SEC Info  
    Home      Search      My Interests      Help      Sign In      Please Sign In
 
We’re going down soon, to move to a new Data Center today.  We’ll be up ASAP.  Sorry.

West Pharmaceutical Services Inc. – ‘10-K’ for 12/31/21 – ‘EX-101.CAL’

On:  Tuesday, 2/22/22, at 4:22pm ET   ·   For:  12/31/21   ·   Accession #:  1628280-22-3342   ·   File #:  1-08036

Previous ‘10-K’:  ‘10-K’ on 2/23/21 for 12/31/20   ·   Next:  ‘10-K’ on 2/21/23 for 12/31/22   ·   Latest:  ‘10-K’ on 2/20/24 for 12/31/23   ·   38 References:   

Find Words in Filings emoji
 
  in    Show  and   Hints

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 2/22/22  West Pharmaceutical Services Inc. 10-K       12/31/21  124:27M                                    Workiva Inc Wde… FA01/FA

Annual Report   —   Form 10-K

Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-K        Annual Report                                       HTML   1.79M 
 3: EX-10.10    Material Contract                                   HTML     91K 
 2: EX-10.9     Material Contract                                   HTML     76K 
 4: EX-21       Subsidiaries List                                   HTML     44K 
 5: EX-23       Consent of Expert or Counsel                        HTML     32K 
 6: EX-31.1     Certification -- §302 - SOA'02                      HTML     35K 
 7: EX-31.2     Certification -- §302 - SOA'02                      HTML     35K 
 8: EX-32.1     Certification -- §906 - SOA'02                      HTML     32K 
 9: EX-32.2     Certification -- §906 - SOA'02                      HTML     32K 
15: R1          Cover                                               HTML     97K 
16: R2          Audit Information                                   HTML     37K 
17: R3          Consolidated Statements of Income                   HTML    110K 
18: R4          Consolidated Statements of Comprehensive Income     HTML     76K 
19: R5          Consolidated Statements of Comprehensive Income     HTML     50K 
                (Parenthetical)                                                  
20: R6          Consolidated Balance Sheets                         HTML    166K 
21: R7          Consolidated Balance Sheets (Parenthetical)         HTML     50K 
22: R8          Consolidated Statement of Equity                    HTML    108K 
23: R9          Consolidated Statement of Equity (Parenthetical)    HTML     34K 
24: R10         Consolidated Statements of Cash Flows               HTML    150K 
25: R11         Basis of Presentation and Summary of Significant    HTML     62K 
                Accounting Policies                                              
26: R12         New Accounting Standards                            HTML     45K 
27: R13         Revenue                                             HTML     82K 
28: R14         Net Income Per Share                                HTML     44K 
29: R15         Property, Plant and Equipment                       HTML     46K 
30: R16         Leases                                              HTML     60K 
31: R17         Affiliated Companies                                HTML     41K 
32: R18         Goodwill and Intangible Assets                      HTML     70K 
33: R19         Other Current Liabilities                           HTML     47K 
34: R20         Debt                                                HTML     57K 
35: R21         Derivative Financial Instruments                    HTML    120K 
36: R22         Fair Value Measurements                             HTML    100K 
37: R23         Accumulated Other Comprehensive Loss                HTML    102K 
38: R24         Stock-Based Compensation                            HTML    144K 
39: R25         Benefit Plans                                       HTML    268K 
40: R26         Other Expense (Income)                              HTML     81K 
41: R27         Income Taxes                                        HTML    108K 
42: R28         Commitments and Contingencies                       HTML     37K 
43: R29         Segment Information                                 HTML    130K 
44: R30         Schedule II - Valuation and Qualifying Accounts     HTML     61K 
45: R31         Basis of Presentation and Summary of Significant    HTML    109K 
                Accounting Policies (Policies)                                   
46: R32         Basis of Presentation and Summary of Significant    HTML     41K 
                Accounting Policies (Tables)                                     
47: R33         Revenue (Tables)                                    HTML     73K 
48: R34         Net Income Per Share (Tables)                       HTML     42K 
49: R35         Property, Plant and Equipment (Tables)              HTML     45K 
50: R36         Leases (Tables)                                     HTML     59K 
51: R37         Affiliated Companies (Tables)                       HTML     38K 
52: R38         Goodwill and Intangible Assets (Tables)             HTML     71K 
53: R39         Other Current Liabilities (Tables)                  HTML     46K 
54: R40         Debt (Tables)                                       HTML     46K 
55: R41         Derivative Financial Instruments (Tables)           HTML    121K 
56: R42         Fair Value Measurements (Tables)                    HTML     94K 
57: R43         Accumulated Other Comprehensive Loss (Tables)       HTML    103K 
58: R44         Stock-Based Compensation (Tables)                   HTML    142K 
59: R45         Benefit Plans (Tables)                              HTML    269K 
60: R46         Other Expense (Income) (Tables)                     HTML     77K 
61: R47         Income Taxes (Tables)                               HTML    110K 
62: R48         Segment Information (Tables)                        HTML    129K 
63: R49         Basis of Presentation and Summary of Significant    HTML     66K 
                Accounting Policies (Details)                                    
64: R50         Revenue - Revenue Recognition (Details)             HTML     78K 
65: R51         Revenue - Contracts Assets and Liabilities          HTML     43K 
                (Details)                                                        
66: R52         Revenue - Contracts and Liabilities, Narrative      HTML     35K 
                (Details)                                                        
67: R53         Revenue - Voluntary Recall (Details)                HTML     33K 
68: R54         Net Income Per Share (Details)                      HTML     64K 
69: R55         Property, Plant and Equipment - Property, Plant     HTML     60K 
                and Equipment, Gross (Details)                                   
70: R56         Property, Plant and Equipment - Narrative           HTML     36K 
                (Details)                                                        
71: R57         Leases - Narrative (Details)                        HTML     45K 
72: R58         Leases - Lease Cost (Details)                       HTML     41K 
73: R59         Leases - Lease Cash Flow and Supplemental           HTML     36K 
                Information (Details)                                            
74: R60         Leases - Maturities of Operating Lease Liabilities  HTML     51K 
                (Details)                                                        
75: R61         Affiliated Companies - Schedule of Investments      HTML     45K 
                (Details)                                                        
76: R62         Affiliated Companies - Narrative (Details)          HTML     65K 
77: R63         Goodwill and Intangible Assets - Goodwill           HTML     49K 
                (Details)                                                        
78: R64         Goodwill and Intangible Assets - Narrative          HTML     53K 
                (Details)                                                        
79: R65         Goodwill and Intangible Assets - Intangible Assets  HTML     53K 
                by Major Class (Details)                                         
80: R66         Other Current Liabilities (Details)                 HTML     60K 
81: R67         Debt - Schedule of Debt (Details)                   HTML     58K 
82: R68         Debt - Narrative (Details)                          HTML    146K 
83: R69         Derivative Financial Instruments - Narrative        HTML     67K 
                (Details)                                                        
84: R70         Derivative Financial Instruments - Foreign          HTML     48K 
                Exchange Rate Risk (Details)                                     
85: R71         Derivative Financial Instruments - Effects of       HTML     92K 
                Derivative Instruments on OCI and Earnings                       
                (Details)                                                        
86: R72         Fair Value Measurements - Fair Value of Assets and  HTML     81K 
                Liabilities (Details)                                            
87: R73         Fair Value Measurements - Changes in Level 3 Fair   HTML     60K 
                Value Measurements (Details)                                     
88: R74         Fair Value Measurements - Other Financial           HTML     36K 
                Instruments (Details)                                            
89: R75         Accumulated Other Comprehensive Loss - Components   HTML     64K 
                of Accumulated Other Comprehensive Income                        
                (Details)                                                        
90: R76         Accumulated Other Comprehensive Loss - Other        HTML     88K 
                Comprehensive Loss Reclassifications (Details)                   
91: R77         Stock-Based Compensation - Narrative (Details)      HTML     93K 
92: R78         Stock-Based Compensation - Allocation of            HTML     49K 
                Share-based Compensation Costs (Details)                         
93: R79         Stock-Based Compensation - Stock Options Activity   HTML     93K 
                (Details)                                                        
94: R80         Stock-Based Compensation - Stock Appreciation       HTML     64K 
                Rights Award Activity (Details)                                  
95: R81         Stock-Based Compensation - Nonvested                HTML     91K 
                Performance-based Award Activity (Details)                       
96: R82         Benefit Plans - Narrative (Details)                 HTML     82K 
97: R83         Benefit Plans - Components of Net Periodic Benefit  HTML     95K 
                Cost (Details)                                                   
98: R84         Benefit Plans - Changes in Projected Benefit        HTML     93K 
                Obligation, Fair Value of Plan Assets and Funded                 
                Status (Details)                                                 
99: R85         Benefit Plans - Amounts Recognized in Balance       HTML     50K 
                Sheet (Details)                                                  
100: R86         Benefit Plans - Amounts Recognized in Other         HTML     45K  
                Comprehensive Income (Loss) (Details)                            
101: R87         Benefit Plans - Expected Benefit Payments           HTML     54K  
                (Details)                                                        
102: R88         Benefit Plans - Assumptions Used (Details)          HTML     51K  
103: R89         Benefit Plans - Weighted Average Interest           HTML     40K  
                Crediting Rating by Geographic Location (Details)                
104: R90         Benefit Plans - Allocation of Plan Assets           HTML     92K  
                (Details)                                                        
105: R91         Other Expense (Income) - Schedule of Other          HTML     62K  
                (Income) Expense (Details)                                       
106: R92         Other Expense (Income) - Narrative (Details)        HTML     86K  
107: R93         Other Expense (Income) - Schedule of Restructuring  HTML     55K  
                and Related Charges (Details)                                    
108: R94         Income Taxes - Unrecognized Tax Benefits (Details)  HTML     44K  
109: R95         Income Taxes - Narrative (Details)                  HTML     75K  
110: R96         Income Taxes - Income Before Income Taxes           HTML     40K  
                (Details)                                                        
111: R97         Income Taxes - Components of Income Tax Expense     HTML     57K  
                (Details)                                                        
112: R98         Income Taxes - Deferred Tax Assets and Liabilities  HTML     61K  
                (Details)                                                        
113: R99         Income Taxes - Effective Income Tax Reconciliation  HTML     61K  
                (Details)                                                        
114: R100        Commitments and Contingencies (Details)             HTML     49K  
115: R101        Segment Information - Narrative (Details)           HTML     33K  
116: R102        Segment Information - Sales by Product Group        HTML     49K  
                (Details)                                                        
117: R103        Segment Information - Sales and Long-lived Assets   HTML     58K  
                by Geographic Location (Details)                                 
118: R104        Segment Information - Segment Financial             HTML    105K  
                Information (Details)                                            
119: R105        Schedule II - Valuation and Qualifying Accounts     HTML     46K  
                (Details)                                                        
122: XML         IDEA XML File -- Filing Summary                      XML    226K  
120: XML         XBRL Instance -- wst-20211231_htm                    XML   4.88M  
121: EXCEL       IDEA Workbook of Financial Reports                  XLSX    164K  
11: EX-101.CAL  XBRL Calculations -- wst-20211231_cal                XML    341K 
12: EX-101.DEF  XBRL Definitions -- wst-20211231_def                 XML   1.09M 
13: EX-101.LAB  XBRL Labels -- wst-20211231_lab                      XML   2.83M 
14: EX-101.PRE  XBRL Presentations -- wst-20211231_pre               XML   1.74M 
10: EX-101.SCH  XBRL Schema -- wst-20211231                          XSD    241K 
123: JSON        XBRL Instance as JSON Data -- MetaLinks              693±  1.01M  
124: ZIP         XBRL Zipped Folder -- 0001628280-22-003342-xbrl      Zip    643K  


‘EX-101.CAL’   —   XBRL Calculations — wst-20211231_cal


This Exhibit is an XBRL XML File.


                                                                                                                                                                                
<?xml version="1.0" encoding="windows-1252"?>
<!-- XBRL Document Created with Wdesk from Workiva -->
<!-- Copyright 2022 Workiva -->
<!-- r:16931477-d118-460a-9b87-93bebd18f571,g:27294c97-ac19-4fc3-944b-75791759f88d -->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
<link:roleRef roleURI="http://www.westpharma.com/role/CONSOLIDATEDSTATEMENTSOFINCOME" xlink:type="simple" xlink:href="wst-20211231.xsd#CONSOLIDATEDSTATEMENTSOFINCOME"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/CONSOLIDATEDSTATEMENTSOFINCOME" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_4b21e854-3acc-42c1-ab1d-1f5b9b00a6aa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GrossProfit"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_ada4588a-8f9f-470a-8cad-ea7a0f547096" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_4b21e854-3acc-42c1-ab1d-1f5b9b00a6aa" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_ada4588a-8f9f-470a-8cad-ea7a0f547096" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_62a92b62-4688-4766-a6e7-830943aea44b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
<link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_4b21e854-3acc-42c1-ab1d-1f5b9b00a6aa" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_62a92b62-4688-4766-a6e7-830943aea44b" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_dc484a3d-60b2-4b9c-a456-48d4a88fd315" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_abbe55a9-be20-49aa-8cce-5a899fbe68d9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_dc484a3d-60b2-4b9c-a456-48d4a88fd315" xlink:to="loc_us-gaap_OperatingIncomeLoss_abbe55a9-be20-49aa-8cce-5a899fbe68d9" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_164248cf-2b0f-404c-b3dd-21b1768cf5c6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestExpense"/>
<link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_dc484a3d-60b2-4b9c-a456-48d4a88fd315" xlink:to="loc_us-gaap_InterestExpense_164248cf-2b0f-404c-b3dd-21b1768cf5c6" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeNet_560c3477-4fe2-4251-8bba-1a04bae99a6d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentIncomeNet"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_dc484a3d-60b2-4b9c-a456-48d4a88fd315" xlink:to="loc_us-gaap_InvestmentIncomeNet_560c3477-4fe2-4251-8bba-1a04bae99a6d" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_4c0600a8-ca37-4139-8af7-33aa9090f046" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_dc484a3d-60b2-4b9c-a456-48d4a88fd315" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_4c0600a8-ca37-4139-8af7-33aa9090f046" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_349d04e4-96d7-4d65-b7fa-1d78ea8f7d25" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_ec1c6170-55b7-4a8c-8c39-4a036380632f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GrossProfit"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_349d04e4-96d7-4d65-b7fa-1d78ea8f7d25" xlink:to="loc_us-gaap_GrossProfit_ec1c6170-55b7-4a8c-8c39-4a036380632f" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_6d17b020-0601-4d12-93d2-49ff503c1d94" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
<link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_349d04e4-96d7-4d65-b7fa-1d78ea8f7d25" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_6d17b020-0601-4d12-93d2-49ff503c1d94" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_abef8276-b0c2-4056-8823-0e060b813b17" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
<link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_349d04e4-96d7-4d65-b7fa-1d78ea8f7d25" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_abef8276-b0c2-4056-8823-0e060b813b17" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_OtherIncomeExpense_7ddc1a49-00a2-45cc-b13c-7e95916646c8" xlink:href="wst-20211231.xsd#wst_OtherIncomeExpense"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_349d04e4-96d7-4d65-b7fa-1d78ea8f7d25" xlink:to="loc_wst_OtherIncomeExpense_7ddc1a49-00a2-45cc-b13c-7e95916646c8" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_c91be74b-ff2f-4054-90ea-661ad3214b6f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_ebf3a59b-584f-463a-8941-bdf24421c080" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c91be74b-ff2f-4054-90ea-661ad3214b6f" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_ebf3a59b-584f-463a-8941-bdf24421c080" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_26c38770-72f4-4c52-879b-a1d3ea7d1478" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
<link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c91be74b-ff2f-4054-90ea-661ad3214b6f" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_26c38770-72f4-4c52-879b-a1d3ea7d1478" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_9f0314a1-2a2d-4006-9dc7-1549585591ea" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c91be74b-ff2f-4054-90ea-661ad3214b6f" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_9f0314a1-2a2d-4006-9dc7-1549585591ea" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME" xlink:type="simple" xlink:href="wst-20211231.xsd#CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_0a68d37f-3b05-4424-8fe0-c2c3756c565e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_c9238b1e-ba5d-4651-a552-bb7bb41acf23" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_0a68d37f-3b05-4424-8fe0-c2c3756c565e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_c9238b1e-ba5d-4651-a552-bb7bb41acf23" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax_9c8f6a66-ab22-43ac-b1b3-218e71ef9716" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax"/>
<link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_0a68d37f-3b05-4424-8fe0-c2c3756c565e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax_9c8f6a66-ab22-43ac-b1b3-218e71ef9716" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_5c406c7b-a345-47fc-9759-b380527ce27d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_0a68d37f-3b05-4424-8fe0-c2c3756c565e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_5c406c7b-a345-47fc-9759-b380527ce27d" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_OtherComprehensiveLossDefinedBenefitPlansSettlementEffectsNetOfTax_107149ad-2fba-4f68-986a-98d6d6ad354f" xlink:href="wst-20211231.xsd#wst_OtherComprehensiveLossDefinedBenefitPlansSettlementEffectsNetOfTax"/>
<link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_0a68d37f-3b05-4424-8fe0-c2c3756c565e" xlink:to="loc_wst_OtherComprehensiveLossDefinedBenefitPlansSettlementEffectsNetOfTax_107149ad-2fba-4f68-986a-98d6d6ad354f" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_53ae67c6-175c-48a0-9968-1e03e1e2f267" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax"/>
<link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_0a68d37f-3b05-4424-8fe0-c2c3756c565e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_53ae67c6-175c-48a0-9968-1e03e1e2f267" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax_525b52e7-e9b2-47ac-b444-065f0d7ea096" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax"/>
<link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_0a68d37f-3b05-4424-8fe0-c2c3756c565e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax_525b52e7-e9b2-47ac-b444-065f0d7ea096" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_badaff89-322d-48eb-bcf8-478c1e93d61f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax"/>
<link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_0a68d37f-3b05-4424-8fe0-c2c3756c565e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_badaff89-322d-48eb-bcf8-478c1e93d61f" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_1e9497e3-a700-451e-ba5a-6d9acfa16321" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent"/>
<link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_0a68d37f-3b05-4424-8fe0-c2c3756c565e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_1e9497e3-a700-451e-ba5a-6d9acfa16321" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_a0451818-0585-4843-883a-053752487a4f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_0eeaf129-c256-4e36-a065-9aa8a8340223" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_a0451818-0585-4843-883a-053752487a4f" xlink:to="loc_us-gaap_NetIncomeLoss_0eeaf129-c256-4e36-a065-9aa8a8340223" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_c7abe496-851f-45dc-aca6-0e8bdf9103ef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_a0451818-0585-4843-883a-053752487a4f" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_c7abe496-851f-45dc-aca6-0e8bdf9103ef" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="wst-20211231.xsd#CONSOLIDATEDBALANCESHEETS"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_3b257daf-f785-4458-83eb-4a490bdf2f81" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsCurrent"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_b82c3e78-d643-4312-8805-ff5038d7c89c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_3b257daf-f785-4458-83eb-4a490bdf2f81" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_b82c3e78-d643-4312-8805-ff5038d7c89c" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_2ff36087-bfa4-4086-b6dd-0feb21a54409" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsReceivableNetCurrent"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_3b257daf-f785-4458-83eb-4a490bdf2f81" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_2ff36087-bfa4-4086-b6dd-0feb21a54409" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_67195e65-64c2-46a4-bb05-01aa0b5d187b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryNet"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_3b257daf-f785-4458-83eb-4a490bdf2f81" xlink:to="loc_us-gaap_InventoryNet_67195e65-64c2-46a4-bb05-01aa0b5d187b" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_86d13c10-bbda-4075-b5b1-f9354a3221ee" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetsCurrent"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_3b257daf-f785-4458-83eb-4a490bdf2f81" xlink:to="loc_us-gaap_OtherAssetsCurrent_86d13c10-bbda-4075-b5b1-f9354a3221ee" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_e77d75ff-7f17-48e4-92e0-92e34f6d481a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_cbf213a4-dae7-4905-ac5d-4b09be418176" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_e77d75ff-7f17-48e4-92e0-92e34f6d481a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_cbf213a4-dae7-4905-ac5d-4b09be418176" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_c5110535-dfc5-487c-bb9c-eb9e008bcb08" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
<link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_e77d75ff-7f17-48e4-92e0-92e34f6d481a" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_c5110535-dfc5-487c-bb9c-eb9e008bcb08" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_e8f459b7-8ea9-47f4-9554-c0cd158dac01" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Liabilities"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_23a2a0cd-4cb1-4b6b-b877-010d71fe431e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_e8f459b7-8ea9-47f4-9554-c0cd158dac01" xlink:to="loc_us-gaap_LiabilitiesCurrent_23a2a0cd-4cb1-4b6b-b877-010d71fe431e" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_e2a27534-f472-4edf-893c-f4f3102cf33d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_e8f459b7-8ea9-47f4-9554-c0cd158dac01" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_e2a27534-f472-4edf-893c-f4f3102cf33d" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_95656915-d29c-40ca-840c-f820b45f4add" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_e8f459b7-8ea9-47f4-9554-c0cd158dac01" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_95656915-d29c-40ca-840c-f820b45f4add" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_cc346290-1751-45c6-8f73-3e083b799058" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_e8f459b7-8ea9-47f4-9554-c0cd158dac01" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_cc346290-1751-45c6-8f73-3e083b799058" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_4628db46-0ace-4c62-bf9b-6c8614b92363" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
<link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_e8f459b7-8ea9-47f4-9554-c0cd158dac01" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_4628db46-0ace-4c62-bf9b-6c8614b92363" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_6a1958c6-2de8-46c3-a32e-f8da30a1edf6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
<link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_e8f459b7-8ea9-47f4-9554-c0cd158dac01" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_6a1958c6-2de8-46c3-a32e-f8da30a1edf6" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_75ec9528-90b8-48df-9605-a62f639ae6a5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent"/>
<link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_e8f459b7-8ea9-47f4-9554-c0cd158dac01" xlink:to="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_75ec9528-90b8-48df-9605-a62f639ae6a5" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_98891a5f-23c5-4ca0-962d-57cff6dc9de9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_cd2e6c07-7a45-4e10-a34c-b8c508e82029" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherLiabilitiesCurrent"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_98891a5f-23c5-4ca0-962d-57cff6dc9de9" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_cd2e6c07-7a45-4e10-a34c-b8c508e82029" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_46a9691a-eec4-4c1f-bec3-cef2b9aef0c1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsPayableCurrent"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_98891a5f-23c5-4ca0-962d-57cff6dc9de9" xlink:to="loc_us-gaap_AccountsPayableCurrent_46a9691a-eec4-4c1f-bec3-cef2b9aef0c1" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_bf925e46-15ad-44fd-a1c2-b129b6cc44c2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_98891a5f-23c5-4ca0-962d-57cff6dc9de9" xlink:to="loc_us-gaap_AccruedIncomeTaxesCurrent_bf925e46-15ad-44fd-a1c2-b129b6cc44c2" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_baeef45b-6746-4bcc-8035-3aec0979aee8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_98891a5f-23c5-4ca0-962d-57cff6dc9de9" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_baeef45b-6746-4bcc-8035-3aec0979aee8" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_d1390b38-2f47-4794-aefc-b1d5e5c5a76a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
<link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_98891a5f-23c5-4ca0-962d-57cff6dc9de9" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_d1390b38-2f47-4794-aefc-b1d5e5c5a76a" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_NotesPayableAndOtherDebtCurrent_c5342bca-9db9-46b9-968a-8522a6bdd7b8" xlink:href="wst-20211231.xsd#wst_NotesPayableAndOtherDebtCurrent"/>
<link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_98891a5f-23c5-4ca0-962d-57cff6dc9de9" xlink:to="loc_wst_NotesPayableAndOtherDebtCurrent_c5342bca-9db9-46b9-968a-8522a6bdd7b8" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_AccruedSalariesWagesAndBenefitsCurrent_53e439b4-c5b9-4b45-863b-19d584ce5430" xlink:href="wst-20211231.xsd#wst_AccruedSalariesWagesAndBenefitsCurrent"/>
<link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_98891a5f-23c5-4ca0-962d-57cff6dc9de9" xlink:to="loc_wst_AccruedSalariesWagesAndBenefitsCurrent_53e439b4-c5b9-4b45-863b-19d584ce5430" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_450fe815-5a48-4c1c-a5fd-4b7e097bb31d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Assets"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_3f987edb-f614-482c-ae89-eb50a1e51feb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsCurrent"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_450fe815-5a48-4c1c-a5fd-4b7e097bb31d" xlink:to="loc_us-gaap_AssetsCurrent_3f987edb-f614-482c-ae89-eb50a1e51feb" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_52e51dfc-09b6-425c-b38e-ed2caba49441" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_450fe815-5a48-4c1c-a5fd-4b7e097bb31d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_52e51dfc-09b6-425c-b38e-ed2caba49441" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_d0982bba-47c3-47e8-85f4-13107479e7c1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_450fe815-5a48-4c1c-a5fd-4b7e097bb31d" xlink:to="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_d0982bba-47c3-47e8-85f4-13107479e7c1" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_1c263ef6-5a54-4d75-9224-3190926080f2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_450fe815-5a48-4c1c-a5fd-4b7e097bb31d" xlink:to="loc_us-gaap_Goodwill_1c263ef6-5a54-4d75-9224-3190926080f2" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_38a2cf74-8f45-4d42-a802-eb838201e888" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
<link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_450fe815-5a48-4c1c-a5fd-4b7e097bb31d" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_38a2cf74-8f45-4d42-a802-eb838201e888" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_8b5b8314-1f1d-40d3-8173-9e2aeeffd376" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
<link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_450fe815-5a48-4c1c-a5fd-4b7e097bb31d" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_8b5b8314-1f1d-40d3-8173-9e2aeeffd376" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_28a906df-5929-433b-8435-2159bfe18a48" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetsNoncurrent"/>
<link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_450fe815-5a48-4c1c-a5fd-4b7e097bb31d" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_28a906df-5929-433b-8435-2159bfe18a48" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_070d0b3a-47b0-4058-bb86-bd5e84b7ebac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
<link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_450fe815-5a48-4c1c-a5fd-4b7e097bb31d" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_070d0b3a-47b0-4058-bb86-bd5e84b7ebac" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_bcf7059f-480f-454e-abbb-1cf1cfc09d7c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent"/>
<link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_450fe815-5a48-4c1c-a5fd-4b7e097bb31d" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_bcf7059f-480f-454e-abbb-1cf1cfc09d7c" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_bd8c883a-b8a2-45f0-b50b-d35783f1c223" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_82b3625e-46b7-4ba1-9f8b-6e3a7cc97ab3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Liabilities"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_bd8c883a-b8a2-45f0-b50b-d35783f1c223" xlink:to="loc_us-gaap_Liabilities_82b3625e-46b7-4ba1-9f8b-6e3a7cc97ab3" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_0a45d74e-1c55-403d-967c-56e46d457452" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommitmentsAndContingencies"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_bd8c883a-b8a2-45f0-b50b-d35783f1c223" xlink:to="loc_us-gaap_CommitmentsAndContingencies_0a45d74e-1c55-403d-967c-56e46d457452" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_5c4402ba-a6c0-4d7c-b196-4a9575e692c6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_bd8c883a-b8a2-45f0-b50b-d35783f1c223" xlink:to="loc_us-gaap_StockholdersEquity_5c4402ba-a6c0-4d7c-b196-4a9575e692c6" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_5c254d25-89f1-4bc4-bc11-e3a0bbdc6b78" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_b6c57d1d-f7cc-48b3-a1e9-0ad21cf0aa27" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockValue"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_5c254d25-89f1-4bc4-bc11-e3a0bbdc6b78" xlink:to="loc_us-gaap_PreferredStockValue_b6c57d1d-f7cc-48b3-a1e9-0ad21cf0aa27" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_9eedaf90-5f78-46ce-b3b8-e6ef041bd02f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockValue"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_5c254d25-89f1-4bc4-bc11-e3a0bbdc6b78" xlink:to="loc_us-gaap_CommonStockValue_9eedaf90-5f78-46ce-b3b8-e6ef041bd02f" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_98498438-de5d-4925-ae98-c9d013aa5646" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapital"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_5c254d25-89f1-4bc4-bc11-e3a0bbdc6b78" xlink:to="loc_us-gaap_AdditionalPaidInCapital_98498438-de5d-4925-ae98-c9d013aa5646" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_842c05e1-b579-45dc-b454-8ea0f9c369d4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_5c254d25-89f1-4bc4-bc11-e3a0bbdc6b78" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_842c05e1-b579-45dc-b454-8ea0f9c369d4" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_bcd4f945-218b-4842-91bd-351d31560fc6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
<link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_5c254d25-89f1-4bc4-bc11-e3a0bbdc6b78" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_bcd4f945-218b-4842-91bd-351d31560fc6" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_1ef97c79-4a00-440a-b8ff-80c98327e025" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockValue"/>
<link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_5c254d25-89f1-4bc4-bc11-e3a0bbdc6b78" xlink:to="loc_us-gaap_TreasuryStockValue_1ef97c79-4a00-440a-b8ff-80c98327e025" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="simple" xlink:href="wst-20211231.xsd#CONSOLIDATEDSTATEMENTSOFCASHFLOWS"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_246fc1c0-2b52-415e-a9af-dab5b17cd06b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_af083fc4-b234-42d1-a65e-39cbcdf9268a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
<link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_246fc1c0-2b52-415e-a9af-dab5b17cd06b" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_af083fc4-b234-42d1-a65e-39cbcdf9268a" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromOtherEquity_8a6b5179-07da-4c22-b68e-0a300e90efac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromOtherEquity"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_246fc1c0-2b52-415e-a9af-dab5b17cd06b" xlink:to="loc_us-gaap_ProceedsFromOtherEquity_8a6b5179-07da-4c22-b68e-0a300e90efac" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_98a0974b-8990-410c-b820-b3d74a85d2c0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_246fc1c0-2b52-415e-a9af-dab5b17cd06b" xlink:to="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_98a0974b-8990-410c-b820-b3d74a85d2c0" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_bda633e7-67ce-46c9-b504-3932cb48ca45" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock"/>
<link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_246fc1c0-2b52-415e-a9af-dab5b17cd06b" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_bda633e7-67ce-46c9-b504-3932cb48ca45" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfOtherLongTermDebt_5c551aa6-f9aa-4025-818b-4e360f2e81c4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIssuanceOfOtherLongTermDebt"/>
<link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_246fc1c0-2b52-415e-a9af-dab5b17cd06b" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfOtherLongTermDebt_5c551aa6-f9aa-4025-818b-4e360f2e81c4" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_d7ab8f77-2261-41cf-8cfd-44ebcab302cf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
<link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_246fc1c0-2b52-415e-a9af-dab5b17cd06b" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_d7ab8f77-2261-41cf-8cfd-44ebcab302cf" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_5f7f7c57-91ec-4144-be0f-13512a95e8db" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions"/>
<link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_246fc1c0-2b52-415e-a9af-dab5b17cd06b" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_5f7f7c57-91ec-4144-be0f-13512a95e8db" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLinesOfCredit_c3bfbc6b-eaf7-4311-a471-98c0f55de8cd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RepaymentsOfLinesOfCredit"/>
<link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_246fc1c0-2b52-415e-a9af-dab5b17cd06b" xlink:to="loc_us-gaap_RepaymentsOfLinesOfCredit_c3bfbc6b-eaf7-4311-a471-98c0f55de8cd" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_65fb3991-475c-4c7b-8265-dd1b524cbff4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
<link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_246fc1c0-2b52-415e-a9af-dab5b17cd06b" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_65fb3991-475c-4c7b-8265-dd1b524cbff4" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_7ac38d31-4f10-4e42-8060-f46c36e741b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
<link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_246fc1c0-2b52-415e-a9af-dab5b17cd06b" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_7ac38d31-4f10-4e42-8060-f46c36e741b0" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_84cd0ba3-d68e-4686-a1c7-fe5a4367c2ce" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_0ca028da-a3d7-4922-a430-a3a6184ba127" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
<link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_84cd0ba3-d68e-4686-a1c7-fe5a4367c2ce" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_0ca028da-a3d7-4922-a430-a3a6184ba127" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates_da1ca9f5-d99b-49e4-80f3-a7d0bd9c9491" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates"/>
<link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_84cd0ba3-d68e-4686-a1c7-fe5a4367c2ce" xlink:to="loc_us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates_da1ca9f5-d99b-49e4-80f3-a7d0bd9c9491" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_cf3b1ce4-2f11-4af5-a1c0-770f400343d7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
<link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_84cd0ba3-d68e-4686-a1c7-fe5a4367c2ce" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_cf3b1ce4-2f11-4af5-a1c0-770f400343d7" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_8bdfd569-4a7d-4d14-bc3b-61ca6908ce50" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
<link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_84cd0ba3-d68e-4686-a1c7-fe5a4367c2ce" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_8bdfd569-4a7d-4d14-bc3b-61ca6908ce50" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_0a2394a8-49b2-4c29-993c-d0c6aebd6949" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_53bf7b6a-dcd3-4879-afe6-aaedc68c64f7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_0a2394a8-49b2-4c29-993c-d0c6aebd6949" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_53bf7b6a-dcd3-4879-afe6-aaedc68c64f7" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0db7420d-e404-4810-bf9d-41645794bb56" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_0a2394a8-49b2-4c29-993c-d0c6aebd6949" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0db7420d-e404-4810-bf9d-41645794bb56" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_5cf092c4-d250-4523-aaf6-7183b05709dc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_0a2394a8-49b2-4c29-993c-d0c6aebd6949" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_5cf092c4-d250-4523-aaf6-7183b05709dc" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_5c234eff-9ebe-42e7-ab26-ee75ece37adb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_0a2394a8-49b2-4c29-993c-d0c6aebd6949" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_5c234eff-9ebe-42e7-ab26-ee75ece37adb" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_25a0d903-043d-4788-bc2c-811ca5b6f79b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_us-gaap_NetIncomeLoss_25a0d903-043d-4788-bc2c-811ca5b6f79b" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_26fe2b8e-092a-4573-ae22-04d078c62634" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Depreciation"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_us-gaap_Depreciation_26fe2b8e-092a-4573-ae22-04d078c62634" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentForAmortization_2e90f7b5-888e-45fc-94ed-2d18e4796334" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentForAmortization"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_us-gaap_AdjustmentForAmortization_2e90f7b5-888e-45fc-94ed-2d18e4796334" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_e05c5f57-85df-4d14-a29f-b80fdf4d7e9e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensation"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_us-gaap_ShareBasedCompensation_e05c5f57-85df-4d14-a29f-b80fdf4d7e9e" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveSettledWithoutCash2_1c2d4f95-145c-4f9b-9339-ee666d9ff9ee" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringReserveSettledWithoutCash2"/>
<link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_us-gaap_RestructuringReserveSettledWithoutCash2_1c2d4f95-145c-4f9b-9339-ee666d9ff9ee" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_93e3fc54-c3b9-4428-be20-affb9b212996" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments"/>
<link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_93e3fc54-c3b9-4428-be20-affb9b212996" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentForContingentConsiderationLiabilityOperatingActivities_002309d8-4e6d-4df9-92b2-9154ff63ffc7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentForContingentConsiderationLiabilityOperatingActivities"/>
<link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_us-gaap_PaymentForContingentConsiderationLiabilityOperatingActivities_002309d8-4e6d-4df9-92b2-9154ff63ffc7" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_28dfd7c1-9882-4b6a-af35-5363b6f66304" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment"/>
<link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_28dfd7c1-9882-4b6a-af35-5363b6f66304" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_d8e431dc-12b3-4e10-b61d-cf3243d430a4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
<link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_d8e431dc-12b3-4e10-b61d-cf3243d430a4" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_PensionAndOtherPostretirementBenefitExpenseNet_3fe5e7b4-4e9c-488c-9ec6-86cb28f773c3" xlink:href="wst-20211231.xsd#wst_PensionAndOtherPostretirementBenefitExpenseNet"/>
<link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_wst_PensionAndOtherPostretirementBenefitExpenseNet_3fe5e7b4-4e9c-488c-9ec6-86cb28f773c3" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_44ede249-f516-4858-af1b-3555b81406b9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions"/>
<link:calculationArc order="11" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_44ede249-f516-4858-af1b-3555b81406b9" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_ca19c851-b17c-4673-adab-380de2d84c00" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
<link:calculationArc order="12" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_ca19c851-b17c-4673-adab-380de2d84c00" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_075a885f-ac21-4d33-bcd8-7b7efe5cd265" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInInventories"/>
<link:calculationArc order="13" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_075a885f-ac21-4d33-bcd8-7b7efe5cd265" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_dc2f2f2d-42b9-4df2-aca2-672b6da478fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets"/>
<link:calculationArc order="14" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_dc2f2f2d-42b9-4df2-aca2-672b6da478fb" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_4afc03fe-c1bd-41b7-9246-72494362763c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
<link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_4afc03fe-c1bd-41b7-9246-72494362763c" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_0f8da413-975e-47b5-acf9-22d76006c04a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet"/>
<link:calculationArc order="16" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c4047e83-46b4-4ca7-ada0-eb309ce1fb28" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_0f8da413-975e-47b5-acf9-22d76006c04a" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_42e05ba7-8b67-4627-bdee-9231bccb7243" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryNet"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_6b5376d4-f0a6-4611-9ee8-d8a54c90ae46" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_42e05ba7-8b67-4627-bdee-9231bccb7243" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_6b5376d4-f0a6-4611-9ee8-d8a54c90ae46" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_c3fd1a22-bcf2-4d64-b60d-70c0ec0a18d0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryWorkInProcessNetOfReserves"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_42e05ba7-8b67-4627-bdee-9231bccb7243" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_c3fd1a22-bcf2-4d64-b60d-70c0ec0a18d0" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_d618adc2-1ec5-4fb1-8847-71888a8e6abf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryRawMaterialsNetOfReserves"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_42e05ba7-8b67-4627-bdee-9231bccb7243" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_d618adc2-1ec5-4fb1-8847-71888a8e6abf" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/NetIncomePerShareDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#NetIncomePerShareDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/NetIncomePerShareDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_f400cd35-4e36-49b3-8a1e-4cf0b7914100" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_6049b306-e383-4398-b5e8-de239ffd1e3f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_f400cd35-4e36-49b3-8a1e-4cf0b7914100" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_6049b306-e383-4398-b5e8-de239ffd1e3f" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_66bceb7a-876b-4247-8ab2-2148b02cab64" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_f400cd35-4e36-49b3-8a1e-4cf0b7914100" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_66bceb7a-876b-4247-8ab2-2148b02cab64" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/LeasesLeaseCostDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#LeasesLeaseCostDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/LeasesLeaseCostDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_d9446d3e-ee12-450f-802c-e07bd1c154e6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseCost"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_cc01e246-4b90-4deb-af23-e14e7496ef63" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseCost"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_d9446d3e-ee12-450f-802c-e07bd1c154e6" xlink:to="loc_us-gaap_OperatingLeaseCost_cc01e246-4b90-4deb-af23-e14e7496ef63" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermLeaseCost_4834e350-ff3c-45b1-af5b-26d4cd936f92" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShortTermLeaseCost"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_d9446d3e-ee12-450f-802c-e07bd1c154e6" xlink:to="loc_us-gaap_ShortTermLeaseCost_4834e350-ff3c-45b1-af5b-26d4cd936f92" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableLeaseCost_86efb2b4-22b7-4018-9c3d-1c7f247d41f8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableLeaseCost"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_d9446d3e-ee12-450f-802c-e07bd1c154e6" xlink:to="loc_us-gaap_VariableLeaseCost_86efb2b4-22b7-4018-9c3d-1c7f247d41f8" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/LeasesMaturitiesofOperatingLeaseLiabilitiesDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#LeasesMaturitiesofOperatingLeaseLiabilitiesDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/LeasesMaturitiesofOperatingLeaseLiabilitiesDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_30e060df-8a9b-47e2-81a7-3e4ff3526d4c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_c85f85e6-c7ec-4914-9ed3-9b960010dd83" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_30e060df-8a9b-47e2-81a7-3e4ff3526d4c" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_c85f85e6-c7ec-4914-9ed3-9b960010dd83" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_31ddb7d5-4fe4-4d64-bab9-97d5eab771b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiability"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_30e060df-8a9b-47e2-81a7-3e4ff3526d4c" xlink:to="loc_us-gaap_OperatingLeaseLiability_31ddb7d5-4fe4-4d64-bab9-97d5eab771b0" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/LeasesMaturitiesofOperatingLeaseLiabilitiesDetails_1" xlink:type="simple" xlink:href="wst-20211231.xsd#LeasesMaturitiesofOperatingLeaseLiabilitiesDetails_1"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/LeasesMaturitiesofOperatingLeaseLiabilitiesDetails_1" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_82f28495-62a2-4d0c-b779-6737e2b1f6d9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_7504d5ab-31d9-48b7-944c-26ab1cfe91a2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_82f28495-62a2-4d0c-b779-6737e2b1f6d9" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_7504d5ab-31d9-48b7-944c-26ab1cfe91a2" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_712f7699-5cf3-4bf9-9315-28c364c126cf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_82f28495-62a2-4d0c-b779-6737e2b1f6d9" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_712f7699-5cf3-4bf9-9315-28c364c126cf" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_8caf47ce-3690-41a3-9c6a-ad06d33cc2de" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_82f28495-62a2-4d0c-b779-6737e2b1f6d9" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_8caf47ce-3690-41a3-9c6a-ad06d33cc2de" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_0acebc58-a389-420e-bd2b-96299cacf2c6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_82f28495-62a2-4d0c-b779-6737e2b1f6d9" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_0acebc58-a389-420e-bd2b-96299cacf2c6" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_b0ee559c-45c5-4dfb-9be3-de8d9ba91200" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
<link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_82f28495-62a2-4d0c-b779-6737e2b1f6d9" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_b0ee559c-45c5-4dfb-9be3-de8d9ba91200" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_79a407f1-6a8a-4b67-82ca-63ae6a90da81" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive"/>
<link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_82f28495-62a2-4d0c-b779-6737e2b1f6d9" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_79a407f1-6a8a-4b67-82ca-63ae6a90da81" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/GoodwillandIntangibleAssetsIntangibleAssetsbyMajorClassDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#GoodwillandIntangibleAssetsIntangibleAssetsbyMajorClassDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/GoodwillandIntangibleAssetsIntangibleAssetsbyMajorClassDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_233156ec-7153-4e7e-aac9-52fe94d6dc29" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_ffcd1430-eb67-4bcf-9601-21c0f92cd07c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_233156ec-7153-4e7e-aac9-52fe94d6dc29" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_ffcd1430-eb67-4bcf-9601-21c0f92cd07c" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_77a1f2a9-4d5e-4811-8100-bfe495c31e1a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
<link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_233156ec-7153-4e7e-aac9-52fe94d6dc29" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_77a1f2a9-4d5e-4811-8100-bfe495c31e1a" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/OtherCurrentLiabilitiesDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#OtherCurrentLiabilitiesDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/OtherCurrentLiabilitiesDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_9e36ca97-9e3f-4792-97bf-5249d61d2737" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherLiabilitiesCurrent"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_dd396d5d-8bf2-473f-bd96-560c46ea6639" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringReserve"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_9e36ca97-9e3f-4792-97bf-5249d61d2737" xlink:to="loc_us-gaap_RestructuringReserve_dd396d5d-8bf2-473f-bd96-560c46ea6639" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent_8908f43e-5235-4b4f-ba5a-ac0784e82741" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_9e36ca97-9e3f-4792-97bf-5249d61d2737" xlink:to="loc_us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent_8908f43e-5235-4b4f-ba5a-ac0784e82741" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedSalesCommissionCurrentAndNoncurrent_225b1b16-f5d0-4d88-a2e1-1b57b36c6983" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedSalesCommissionCurrentAndNoncurrent"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_9e36ca97-9e3f-4792-97bf-5249d61d2737" xlink:to="loc_us-gaap_AccruedSalesCommissionCurrentAndNoncurrent_225b1b16-f5d0-4d88-a2e1-1b57b36c6983" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableCurrent_4e5773ad-a553-41d4-bedf-0b89d380dd25" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsPayableCurrent"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_9e36ca97-9e3f-4792-97bf-5249d61d2737" xlink:to="loc_us-gaap_DividendsPayableCurrent_4e5773ad-a553-41d4-bedf-0b89d380dd25" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitsPayableCurrentAndNoncurrent_135bff77-7e3f-4839-b18d-1e2e602d09e3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherPostretirementBenefitsPayableCurrentAndNoncurrent"/>
<link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_9e36ca97-9e3f-4792-97bf-5249d61d2737" xlink:to="loc_us-gaap_OtherPostretirementBenefitsPayableCurrentAndNoncurrent_135bff77-7e3f-4839-b18d-1e2e602d09e3" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredRevenueCurrent_df041016-8b20-4ba1-a7cb-b2e0ff75e16b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredRevenueCurrent"/>
<link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_9e36ca97-9e3f-4792-97bf-5249d61d2737" xlink:to="loc_us-gaap_DeferredRevenueCurrent_df041016-8b20-4ba1-a7cb-b2e0ff75e16b" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent_41d34f6a-265c-4ba7-990a-01f95d7dab0a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestPayableCurrent"/>
<link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_9e36ca97-9e3f-4792-97bf-5249d61d2737" xlink:to="loc_us-gaap_InterestPayableCurrent_41d34f6a-265c-4ba7-990a-01f95d7dab0a" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedProfessionalFeesCurrent_ece4347e-5f79-44ee-9a7a-0516493ea925" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedProfessionalFeesCurrent"/>
<link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_9e36ca97-9e3f-4792-97bf-5249d61d2737" xlink:to="loc_us-gaap_AccruedProfessionalFeesCurrent_ece4347e-5f79-44ee-9a7a-0516493ea925" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSundryLiabilitiesCurrent_8d6c18f0-5ac0-43fc-b6dc-8486b2bd9c22" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherSundryLiabilitiesCurrent"/>
<link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_9e36ca97-9e3f-4792-97bf-5249d61d2737" xlink:to="loc_us-gaap_OtherSundryLiabilitiesCurrent_8d6c18f0-5ac0-43fc-b6dc-8486b2bd9c22" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesCurrent_7c6f9d9a-b0d9-42c5-b28f-6e456ab5a114" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLiabilitiesCurrent"/>
<link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesCurrent_9e36ca97-9e3f-4792-97bf-5249d61d2737" xlink:to="loc_us-gaap_DerivativeLiabilitiesCurrent_7c6f9d9a-b0d9-42c5-b28f-6e456ab5a114" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/DebtScheduleofDebtDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#DebtScheduleofDebtDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/DebtScheduleofDebtDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_e9568908-fc70-4ed8-918f-3730bf5d1e4a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebt"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_312f5b0c-72a8-4d7b-acd3-d36894db8cdc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtCurrent"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_e9568908-fc70-4ed8-918f-3730bf5d1e4a" xlink:to="loc_us-gaap_LongTermDebtCurrent_312f5b0c-72a8-4d7b-acd3-d36894db8cdc" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_e2f0b272-237f-41c1-80d8-175d50b4785e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_e9568908-fc70-4ed8-918f-3730bf5d1e4a" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_e2f0b272-237f-41c1-80d8-175d50b4785e" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/DebtScheduleofDebtDetails_1" xlink:type="simple" xlink:href="wst-20211231.xsd#DebtScheduleofDebtDetails_1"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/DebtScheduleofDebtDetails_1" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_ff86f8e6-2fbe-46ab-981c-2ab65cde0e50" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebt"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_7d4eca45-0c48-456c-ac42-f670ed671ef5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_ff86f8e6-2fbe-46ab-981c-2ab65cde0e50" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_7d4eca45-0c48-456c-ac42-f670ed671ef5" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_c6becb05-d4a0-4c7f-b708-0852e8bf01ef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense"/>
<link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_ff86f8e6-2fbe-46ab-981c-2ab65cde0e50" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_c6becb05-d4a0-4c7f-b708-0852e8bf01ef" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/DerivativeFinancialInstrumentsEffectsofDerivativeInstrumentsonOCIandEarningsDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#DerivativeFinancialInstrumentsEffectsofDerivativeInstrumentsonOCIandEarningsDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/DerivativeFinancialInstrumentsEffectsofDerivativeInstrumentsonOCIandEarningsDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings_d74ac393-394b-4bab-8c84-11283fae0a97" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet_98fb9d4c-d6a4-470b-b11b-0f7e37cad883" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings_d74ac393-394b-4bab-8c84-11283fae0a97" xlink:to="loc_us-gaap_GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet_98fb9d4c-d6a4-470b-b11b-0f7e37cad883" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1_26abd898-0814-4932-a85d-488b0e8da512" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings_d74ac393-394b-4bab-8c84-11283fae0a97" xlink:to="loc_us-gaap_ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1_26abd898-0814-4932-a85d-488b0e8da512" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1_a8816e55-2d37-4519-ae34-43b79acfc60b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings_d74ac393-394b-4bab-8c84-11283fae0a97" xlink:to="loc_us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1_a8816e55-2d37-4519-ae34-43b79acfc60b" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/FairValueMeasurementsFairValueofAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#FairValueMeasurementsFairValueofAssetsandLiabilitiesDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/FairValueMeasurementsFairValueofAssetsandLiabilitiesDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_c7a73951-7680-4ad0-99b8-b32077abfc2f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_ba42c2fc-6b66-4f6b-b432-1cf61d871b8f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosure_c7a73951-7680-4ad0-99b8-b32077abfc2f" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_ba42c2fc-6b66-4f6b-b432-1cf61d871b8f" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherDeferredCompensationArrangementsLiabilityClassifiedNoncurrent_bcb1c6ef-8774-4032-b867-7787b2c5971a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherDeferredCompensationArrangementsLiabilityClassifiedNoncurrent"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosure_c7a73951-7680-4ad0-99b8-b32077abfc2f" xlink:to="loc_us-gaap_OtherDeferredCompensationArrangementsLiabilityClassifiedNoncurrent_bcb1c6ef-8774-4032-b867-7787b2c5971a" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure_b1c3da9e-688c-4f3f-ae1f-a709013a73d0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosure_c7a73951-7680-4ad0-99b8-b32077abfc2f" xlink:to="loc_us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure_b1c3da9e-688c-4f3f-ae1f-a709013a73d0" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_d7803065-af9f-45f3-94c7-ab5890cccc95" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsFairValueDisclosure"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_8ee79ed9-5bc9-4c00-8b5c-a5321e6759fc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignCurrencyContractAssetFairValueDisclosure"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_d7803065-af9f-45f3-94c7-ab5890cccc95" xlink:to="loc_us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_8ee79ed9-5bc9-4c00-8b5c-a5321e6759fc" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationPlanAssets_d7026569-f761-46f8-92d5-965e9f4342eb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredCompensationPlanAssets"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_d7803065-af9f-45f3-94c7-ab5890cccc95" xlink:to="loc_us-gaap_DeferredCompensationPlanAssets_d7026569-f761-46f8-92d5-965e9f4342eb" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_f2d053b3-25d3-4bbf-9342-fcb86331fe79" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeAssets"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_d7803065-af9f-45f3-94c7-ab5890cccc95" xlink:to="loc_us-gaap_DerivativeAssets_f2d053b3-25d3-4bbf-9342-fcb86331fe79" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/AccumulatedOtherComprehensiveLossComponentsofAccumulatedOtherComprehensiveIncomeDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#AccumulatedOtherComprehensiveLossComponentsofAccumulatedOtherComprehensiveIncomeDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/AccumulatedOtherComprehensiveLossComponentsofAccumulatedOtherComprehensiveIncomeDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_9b343829-f7b5-40a4-8e4a-0082059a2ed6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_4da7b0c0-6901-43f4-9af3-43d0f9c6d6f7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_9b343829-f7b5-40a4-8e4a-0082059a2ed6" xlink:to="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_4da7b0c0-6901-43f4-9af3-43d0f9c6d6f7" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_4cea735b-ef42-43ac-8c71-54092f72dfb0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent"/>
<link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_9b343829-f7b5-40a4-8e4a-0082059a2ed6" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_4cea735b-ef42-43ac-8c71-54092f72dfb0" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/BenefitPlansComponentsofNetPeriodicBenefitCostDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#BenefitPlansComponentsofNetPeriodicBenefitCostDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/BenefitPlansComponentsofNetPeriodicBenefitCostDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_c075deb1-5df2-4e44-9d87-e396b03f751f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_8dd6afac-2293-4302-a767-c1cffdc40f4f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_c075deb1-5df2-4e44-9d87-e396b03f751f" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_8dd6afac-2293-4302-a767-c1cffdc40f4f" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_3da9bc31-5581-4bf5-8cc8-aa6bdc9ea0df" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_c075deb1-5df2-4e44-9d87-e396b03f751f" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_3da9bc31-5581-4bf5-8cc8-aa6bdc9ea0df" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_2d7ca63e-cb3e-4a00-8452-f643389be235" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
<link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_c075deb1-5df2-4e44-9d87-e396b03f751f" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_2d7ca63e-cb3e-4a00-8452-f643389be235" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_26be7dc4-c8dc-4d07-8fe5-1dc3e3bdf0f3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_c075deb1-5df2-4e44-9d87-e396b03f751f" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_26be7dc4-c8dc-4d07-8fe5-1dc3e3bdf0f3" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_38c0ed9f-ffa6-4272-96fc-8475e2763e62" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
<link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_c075deb1-5df2-4e44-9d87-e396b03f751f" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_38c0ed9f-ffa6-4272-96fc-8475e2763e62" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_a2d476e9-41f4-45fd-8b39-8cd3e62a5a00" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1"/>
<link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_c075deb1-5df2-4e44-9d87-e396b03f751f" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_a2d476e9-41f4-45fd-8b39-8cd3e62a5a00" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax_bba27477-b2a0-469a-9156-7c2fd1013148" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_ec940f01-306a-4884-b5de-0ed9fcc6635f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax_bba27477-b2a0-469a-9156-7c2fd1013148" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_ec940f01-306a-4884-b5de-0ed9fcc6635f" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_a18c259c-e565-4010-aef5-2a1aad02319a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax_bba27477-b2a0-469a-9156-7c2fd1013148" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_a18c259c-e565-4010-aef5-2a1aad02319a" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_f42de44b-fd65-4acc-8bb4-205692cfb057" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_08f66b51-9408-43ca-8e7f-2adaf2e76622" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax"/>
<link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_f42de44b-fd65-4acc-8bb4-205692cfb057" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_08f66b51-9408-43ca-8e7f-2adaf2e76622" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax_d377dd00-2f04-4fef-b68f-5ad8689c9caf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_f42de44b-fd65-4acc-8bb4-205692cfb057" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax_d377dd00-2f04-4fef-b68f-5ad8689c9caf" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax_dd6de949-a959-47dc-be66-c6daea7aecbf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax"/>
<link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_f42de44b-fd65-4acc-8bb4-205692cfb057" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax_dd6de949-a959-47dc-be66-c6daea7aecbf" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_b429393b-f91b-466d-8464-3335979f5e39" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_f42de44b-fd65-4acc-8bb4-205692cfb057" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_b429393b-f91b-466d-8464-3335979f5e39" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_OtherComprehensiveIncomeLossDefinedBenefitPlanSettlementGainLossBeforeTax_a224e5a1-3177-4f11-8b36-39e0aaf48c29" xlink:href="wst-20211231.xsd#wst_OtherComprehensiveIncomeLossDefinedBenefitPlanSettlementGainLossBeforeTax"/>
<link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_f42de44b-fd65-4acc-8bb4-205692cfb057" xlink:to="loc_wst_OtherComprehensiveIncomeLossDefinedBenefitPlanSettlementGainLossBeforeTax_a224e5a1-3177-4f11-8b36-39e0aaf48c29" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_OtherComprehensiveIncomeLossDefinedBenefitPlanForeignCurrencyExchangeRateChanges_5eb74179-4d3c-4993-b92a-8028164c5f18" xlink:href="wst-20211231.xsd#wst_OtherComprehensiveIncomeLossDefinedBenefitPlanForeignCurrencyExchangeRateChanges"/>
<link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_f42de44b-fd65-4acc-8bb4-205692cfb057" xlink:to="loc_wst_OtherComprehensiveIncomeLossDefinedBenefitPlanForeignCurrencyExchangeRateChanges_5eb74179-4d3c-4993-b92a-8028164c5f18" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/BenefitPlansChangesinProjectedBenefitObligationFairValueofPlanAssetsandFundedStatusDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#BenefitPlansChangesinProjectedBenefitObligationFairValueofPlanAssetsandFundedStatusDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/BenefitPlansChangesinProjectedBenefitObligationFairValueofPlanAssetsandFundedStatusDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_38351223-0c25-4fa8-95f6-51e61f52a546" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_acff150c-7f8f-46ce-95da-8c06aa048090" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation"/>
<link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_38351223-0c25-4fa8-95f6-51e61f52a546" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_acff150c-7f8f-46ce-95da-8c06aa048090" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_3a279a8c-a7f5-4624-9d2e-fae70d24993e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_38351223-0c25-4fa8-95f6-51e61f52a546" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_3a279a8c-a7f5-4624-9d2e-fae70d24993e" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/BenefitPlansAmountsRecognizedinBalanceSheetDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#BenefitPlansAmountsRecognizedinBalanceSheetDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/BenefitPlansAmountsRecognizedinBalanceSheetDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_52248cbf-9165-4ee0-8bf0-2c606c4d6771" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_4c27d902-54e7-4c0a-a38b-86afd198e7b4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_52248cbf-9165-4ee0-8bf0-2c606c4d6771" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_4c27d902-54e7-4c0a-a38b-86afd198e7b4" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_dc01d217-97c9-4cca-8101-2122fec2dacd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_52248cbf-9165-4ee0-8bf0-2c606c4d6771" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_dc01d217-97c9-4cca-8101-2122fec2dacd" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_AssetsDefinedBenefitPlansNoncurrent_33535aa4-556a-4d98-a7eb-da4b357fb41d" xlink:href="wst-20211231.xsd#wst_AssetsDefinedBenefitPlansNoncurrent"/>
<link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_52248cbf-9165-4ee0-8bf0-2c606c4d6771" xlink:to="loc_wst_AssetsDefinedBenefitPlansNoncurrent_33535aa4-556a-4d98-a7eb-da4b357fb41d" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/BenefitPlansAmountsRecognizedinOtherComprehensiveIncomeLossDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#BenefitPlansAmountsRecognizedinOtherComprehensiveIncomeLossDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/BenefitPlansAmountsRecognizedinOtherComprehensiveIncomeLossDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_b8e91892-f388-4436-85b0-5afa508338de" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_09700c3a-9921-4716-bdf9-6ebdd148a874" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax"/>
<link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_b8e91892-f388-4436-85b0-5afa508338de" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_09700c3a-9921-4716-bdf9-6ebdd148a874" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_af487142-1bff-4caa-8d70-9a38d8878f0d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_b8e91892-f388-4436-85b0-5afa508338de" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_af487142-1bff-4caa-8d70-9a38d8878f0d" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/BenefitPlansExpectedBenefitPaymentsDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#BenefitPlansExpectedBenefitPaymentsDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/BenefitPlansExpectedBenefitPaymentsDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_wst_DefinedBenefitPlanExpectedFutureBenefitPayments_0594169e-03eb-4c41-aa70-aea9b961a764" xlink:href="wst-20211231.xsd#wst_DefinedBenefitPlanExpectedFutureBenefitPayments"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_56438b62-575b-42a7-a1e0-10fdd23ec5da" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wst_DefinedBenefitPlanExpectedFutureBenefitPayments_0594169e-03eb-4c41-aa70-aea9b961a764" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_56438b62-575b-42a7-a1e0-10fdd23ec5da" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_8c37e445-5ad6-4244-a849-8aa766aa6233" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wst_DefinedBenefitPlanExpectedFutureBenefitPayments_0594169e-03eb-4c41-aa70-aea9b961a764" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_8c37e445-5ad6-4244-a849-8aa766aa6233" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_bc72ee87-bd32-4e12-990f-342bc41a00c8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wst_DefinedBenefitPlanExpectedFutureBenefitPayments_0594169e-03eb-4c41-aa70-aea9b961a764" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_bc72ee87-bd32-4e12-990f-342bc41a00c8" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_680a3bfd-dfbf-4d9e-8a59-96d9975afcd0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wst_DefinedBenefitPlanExpectedFutureBenefitPayments_0594169e-03eb-4c41-aa70-aea9b961a764" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_680a3bfd-dfbf-4d9e-8a59-96d9975afcd0" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_52244b69-ff7e-46ea-854b-9e6806e69639" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive"/>
<link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wst_DefinedBenefitPlanExpectedFutureBenefitPayments_0594169e-03eb-4c41-aa70-aea9b961a764" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_52244b69-ff7e-46ea-854b-9e6806e69639" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_de7cb507-95cc-41ac-bfcc-380b93bc7d1d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter"/>
<link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wst_DefinedBenefitPlanExpectedFutureBenefitPayments_0594169e-03eb-4c41-aa70-aea9b961a764" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_de7cb507-95cc-41ac-bfcc-380b93bc7d1d" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/OtherExpenseIncomeScheduleofOtherIncomeExpenseDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#OtherExpenseIncomeScheduleofOtherIncomeExpenseDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/OtherExpenseIncomeScheduleofOtherIncomeExpenseDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostIncurredCost_db9d33b3-14ff-44bc-81d1-e5df3efa11a8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringAndRelatedCostIncurredCost"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeveranceCosts1_345143ad-0d0a-42ee-b55d-35cfca0910fa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeveranceCosts1"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RestructuringAndRelatedCostIncurredCost_db9d33b3-14ff-44bc-81d1-e5df3efa11a8" xlink:to="loc_us-gaap_SeveranceCosts1_345143ad-0d0a-42ee-b55d-35cfca0910fa" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_62bde61a-8cfe-45bf-aefe-9e8982d2cff4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetImpairmentCharges"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RestructuringAndRelatedCostIncurredCost_db9d33b3-14ff-44bc-81d1-e5df3efa11a8" xlink:to="loc_us-gaap_AssetImpairmentCharges_62bde61a-8cfe-45bf-aefe-9e8982d2cff4" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRestructuringCosts_1784cfab-6d2f-4736-bf2d-301112bc27fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherRestructuringCosts"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RestructuringAndRelatedCostIncurredCost_db9d33b3-14ff-44bc-81d1-e5df3efa11a8" xlink:to="loc_us-gaap_OtherRestructuringCosts_1784cfab-6d2f-4736-bf2d-301112bc27fb" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_OtherIncomeExpense_5f47fe9f-4a70-413c-bd38-b8047a7a98b1" xlink:href="wst-20211231.xsd#wst_OtherIncomeExpense"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_DevelopmentAndLicensingIncome_587c6dc7-46d8-4598-8b02-2d737c03f551" xlink:href="wst-20211231.xsd#wst_DevelopmentAndLicensingIncome"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wst_OtherIncomeExpense_5f47fe9f-4a70-413c-bd38-b8047a7a98b1" xlink:to="loc_wst_DevelopmentAndLicensingIncome_587c6dc7-46d8-4598-8b02-2d737c03f551" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_da443ce2-4bc4-4459-8a03-ed3233d31311" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wst_OtherIncomeExpense_5f47fe9f-4a70-413c-bd38-b8047a7a98b1" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_da443ce2-4bc4-4459-8a03-ed3233d31311" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnInvestments_f6bcd4a6-19b6-41db-a88d-7e91e62edead" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnInvestments"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wst_OtherIncomeExpense_5f47fe9f-4a70-413c-bd38-b8047a7a98b1" xlink:to="loc_us-gaap_GainLossOnInvestments_f6bcd4a6-19b6-41db-a88d-7e91e62edead" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionLossBeforeTax_3374ff23-8789-4553-a96d-280c4cde0812" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignCurrencyTransactionLossBeforeTax"/>
<link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wst_OtherIncomeExpense_5f47fe9f-4a70-413c-bd38-b8047a7a98b1" xlink:to="loc_us-gaap_ForeignCurrencyTransactionLossBeforeTax_3374ff23-8789-4553-a96d-280c4cde0812" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_BrazilTaxRecovery_e735e2dc-8a6f-4ff9-8c4a-76c6d1ed06e8" xlink:href="wst-20211231.xsd#wst_BrazilTaxRecovery"/>
<link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wst_OtherIncomeExpense_5f47fe9f-4a70-413c-bd38-b8047a7a98b1" xlink:to="loc_wst_BrazilTaxRecovery_e735e2dc-8a6f-4ff9-8c4a-76c6d1ed06e8" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostIncurredCost_63d68f10-9c06-4c05-a5ba-4ac2b1ec30ae" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringAndRelatedCostIncurredCost"/>
<link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wst_OtherIncomeExpense_5f47fe9f-4a70-413c-bd38-b8047a7a98b1" xlink:to="loc_us-gaap_RestructuringAndRelatedCostIncurredCost_63d68f10-9c06-4c05-a5ba-4ac2b1ec30ae" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetImpairmentCharges_fb88bd30-f118-4538-b096-7e2d3f104656" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetImpairmentCharges"/>
<link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wst_OtherIncomeExpense_5f47fe9f-4a70-413c-bd38-b8047a7a98b1" xlink:to="loc_us-gaap_OtherAssetImpairmentCharges_fb88bd30-f118-4538-b096-7e2d3f104656" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_e0189a36-933f-4b02-9f49-ca5fd486046b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1"/>
<link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wst_OtherIncomeExpense_5f47fe9f-4a70-413c-bd38-b8047a7a98b1" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_e0189a36-933f-4b02-9f49-ca5fd486046b" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseNet_71d9297a-9754-4b5e-84a1-b888a812504c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherOperatingIncomeExpenseNet"/>
<link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wst_OtherIncomeExpense_5f47fe9f-4a70-413c-bd38-b8047a7a98b1" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseNet_71d9297a-9754-4b5e-84a1-b888a812504c" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/IncomeTaxesIncomeBeforeIncomeTaxesDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#IncomeTaxesIncomeBeforeIncomeTaxesDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/IncomeTaxesIncomeBeforeIncomeTaxesDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_ee4f1a2a-3305-4e4a-b78d-5aad4fb00344" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_7e357b5f-2dbd-4a01-a074-40fa7a7c165e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_ee4f1a2a-3305-4e4a-b78d-5aad4fb00344" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_7e357b5f-2dbd-4a01-a074-40fa7a7c165e" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_58fbc550-f689-40aa-a07f-07e4d758e55e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_ee4f1a2a-3305-4e4a-b78d-5aad4fb00344" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_58fbc550-f689-40aa-a07f-07e4d758e55e" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/IncomeTaxesComponentsofIncomeTaxExpenseDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#IncomeTaxesComponentsofIncomeTaxExpenseDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/IncomeTaxesComponentsofIncomeTaxExpenseDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_2e2a6da7-80da-43aa-ad88-77288079a300" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_DeferredFederalStateAndLocalIncomeTaxExpenseBenefit_1244dd4a-1acd-4c77-b398-8e92167d48c3" xlink:href="wst-20211231.xsd#wst_DeferredFederalStateAndLocalIncomeTaxExpenseBenefit"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_2e2a6da7-80da-43aa-ad88-77288079a300" xlink:to="loc_wst_DeferredFederalStateAndLocalIncomeTaxExpenseBenefit_1244dd4a-1acd-4c77-b398-8e92167d48c3" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_60d0c9ed-5386-4e20-a6e1-6cae3b0aca10" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_2e2a6da7-80da-43aa-ad88-77288079a300" xlink:to="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_60d0c9ed-5386-4e20-a6e1-6cae3b0aca10" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_476b6fbb-c430-49d5-b7e9-1e45e7fafadc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_98da7e02-84aa-432a-9f94-f3fd54e03881" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_476b6fbb-c430-49d5-b7e9-1e45e7fafadc" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_98da7e02-84aa-432a-9f94-f3fd54e03881" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_64b534b1-5f8c-4199-aef3-f879a0ff054c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_476b6fbb-c430-49d5-b7e9-1e45e7fafadc" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_64b534b1-5f8c-4199-aef3-f879a0ff054c" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_d7ce0b1e-d0c6-487f-9f36-a55dbd6e60f5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_4682fd24-fc5c-47a9-977d-87869c6e77b8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_d7ce0b1e-d0c6-487f-9f36-a55dbd6e60f5" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_4682fd24-fc5c-47a9-977d-87869c6e77b8" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_8b3b2491-ad67-49c2-aaf4-16a0a116cce6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_d7ce0b1e-d0c6-487f-9f36-a55dbd6e60f5" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_8b3b2491-ad67-49c2-aaf4-16a0a116cce6" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentForeignTaxExpenseBenefit_95c9489f-d75f-456b-8607-76b39cd17fa5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CurrentForeignTaxExpenseBenefit"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_d7ce0b1e-d0c6-487f-9f36-a55dbd6e60f5" xlink:to="loc_us-gaap_CurrentForeignTaxExpenseBenefit_95c9489f-d75f-456b-8607-76b39cd17fa5" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/IncomeTaxesDeferredTaxAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#IncomeTaxesDeferredTaxAssetsandLiabilitiesDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/IncomeTaxesDeferredTaxAssetsandLiabilitiesDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_902a46f0-6310-455b-a222-a6f4e418b8cc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_e42f20a6-efd9-44c3-b1fe-0f577a6e62f5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_902a46f0-6310-455b-a222-a6f4e418b8cc" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_e42f20a6-efd9-44c3-b1fe-0f577a6e62f5" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings_ba786c1a-c4bb-42db-9c18-2b1f8b97f54a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_902a46f0-6310-455b-a222-a6f4e418b8cc" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings_ba786c1a-c4bb-42db-9c18-2b1f8b97f54a" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOther_15f0e701-962f-4564-bef0-567d2869a2cf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOther"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_902a46f0-6310-455b-a222-a6f4e418b8cc" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOther_15f0e701-962f-4564-bef0-567d2869a2cf" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_98f90ffa-741c-4a24-95a5-0c14b2d17ab9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsNet"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_709a6665-45a5-487d-ad89-49f528fd0732" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwards"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_98f90ffa-741c-4a24-95a5-0c14b2d17ab9" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_709a6665-45a5-487d-ad89-49f528fd0732" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_327dca52-4ebf-43c2-b28b-65d8a79e35e7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
<link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_98f90ffa-741c-4a24-95a5-0c14b2d17ab9" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_327dca52-4ebf-43c2-b28b-65d8a79e35e7" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_36d354be-f0e5-42e6-b594-3002d80a3c65" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_98f90ffa-741c-4a24-95a5-0c14b2d17ab9" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_36d354be-f0e5-42e6-b594-3002d80a3c65" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits_8f74f808-13d7-42fb-b561-48d9bff32db8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_98f90ffa-741c-4a24-95a5-0c14b2d17ab9" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits_8f74f808-13d7-42fb-b561-48d9bff32db8" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_DeferredTaxAssetsRoyaltyAcceleration_e7e97960-c037-41b5-bb7a-a41f4d511643" xlink:href="wst-20211231.xsd#wst_DeferredTaxAssetsRoyaltyAcceleration"/>
<link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_98f90ffa-741c-4a24-95a5-0c14b2d17ab9" xlink:to="loc_wst_DeferredTaxAssetsRoyaltyAcceleration_e7e97960-c037-41b5-bb7a-a41f4d511643" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_5192b14f-dbde-4e17-a7a8-76164dd554f4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsOther"/>
<link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_98f90ffa-741c-4a24-95a5-0c14b2d17ab9" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_5192b14f-dbde-4e17-a7a8-76164dd554f4" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_54316f8f-828c-4e21-b0a0-05a8ebc4ec8f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_4c65b63a-0e6c-4ac9-9032-bfa9e14e0705" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsNet"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_54316f8f-828c-4e21-b0a0-05a8ebc4ec8f" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_4c65b63a-0e6c-4ac9-9032-bfa9e14e0705" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_855196c4-eada-4eae-8046-9e8f679fc9ad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
<link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_54316f8f-828c-4e21-b0a0-05a8ebc4ec8f" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_855196c4-eada-4eae-8046-9e8f679fc9ad" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/IncomeTaxesEffectiveIncomeTaxReconciliationDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#IncomeTaxesEffectiveIncomeTaxReconciliationDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/IncomeTaxesEffectiveIncomeTaxReconciliationDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8f379f6a-6a7d-45d1-af31-5f01beefe644" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_2d1882c5-45d3-441d-a76c-9a326b551224" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8f379f6a-6a7d-45d1-af31-5f01beefe644" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_2d1882c5-45d3-441d-a76c-9a326b551224" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_1bf22214-2669-406a-a39a-3d55bfeed95f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8f379f6a-6a7d-45d1-af31-5f01beefe644" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_1bf22214-2669-406a-a39a-3d55bfeed95f" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes_e5976930-65cb-442e-94fe-f19ce4e6e7ae" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes"/>
<link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8f379f6a-6a7d-45d1-af31-5f01beefe644" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes_e5976930-65cb-442e-94fe-f19ce4e6e7ae" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarningsNetOfForeignTaxCreditsPercent_8a47dd8f-d283-4e5e-857a-7c63e0f58617" xlink:href="wst-20211231.xsd#wst_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarningsNetOfForeignTaxCreditsPercent"/>
<link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8f379f6a-6a7d-45d1-af31-5f01beefe644" xlink:to="loc_wst_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarningsNetOfForeignTaxCreditsPercent_8a47dd8f-d283-4e5e-857a-7c63e0f58617" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_54be01d4-d939-4437-941e-cff9831f96dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
<link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8f379f6a-6a7d-45d1-af31-5f01beefe644" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_54be01d4-d939-4437-941e-cff9831f96dd" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_6e146d49-6267-4df8-ae5c-693b4ebd50b1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch"/>
<link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8f379f6a-6a7d-45d1-af31-5f01beefe644" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_6e146d49-6267-4df8-ae5c-693b4ebd50b1" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent_a6265ee8-4980-4e97-ab24-ddbfea7a2a51" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent"/>
<link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8f379f6a-6a7d-45d1-af31-5f01beefe644" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent_a6265ee8-4980-4e97-ab24-ddbfea7a2a51" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_EffectiveIncomeTaxRateReconciliationRoyaltyAccelerationPercent_61a06c32-e3d4-44e0-9ec2-36021dd493c8" xlink:href="wst-20211231.xsd#wst_EffectiveIncomeTaxRateReconciliationRoyaltyAccelerationPercent"/>
<link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8f379f6a-6a7d-45d1-af31-5f01beefe644" xlink:to="loc_wst_EffectiveIncomeTaxRateReconciliationRoyaltyAccelerationPercent_61a06c32-e3d4-44e0-9ec2-36021dd493c8" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_EffectiveIncomeTaxRateReconciliationUndistributedEarningsOfSubsidiariesPercentage_a21f48cf-8db5-4f90-a22f-89312e579123" xlink:href="wst-20211231.xsd#wst_EffectiveIncomeTaxRateReconciliationUndistributedEarningsOfSubsidiariesPercentage"/>
<link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8f379f6a-6a7d-45d1-af31-5f01beefe644" xlink:to="loc_wst_EffectiveIncomeTaxRateReconciliationUndistributedEarningsOfSubsidiariesPercentage_a21f48cf-8db5-4f90-a22f-89312e579123" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_b6fe033b-aa00-472b-a608-201aaa7f2aae" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments"/>
<link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8f379f6a-6a7d-45d1-af31-5f01beefe644" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_b6fe033b-aa00-472b-a608-201aaa7f2aae" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_wst_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomeDeductionsFDIIPercent_355d073a-7b54-4588-936d-3426a31aa345" xlink:href="wst-20211231.xsd#wst_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomeDeductionsFDIIPercent"/>
<link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8f379f6a-6a7d-45d1-af31-5f01beefe644" xlink:to="loc_wst_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomeDeductionsFDIIPercent_355d073a-7b54-4588-936d-3426a31aa345" xlink:type="arc"/>
</link:calculationLink>
<link:roleRef roleURI="http://www.westpharma.com/role/SegmentInformationSegmentFinancialInformationDetails" xlink:type="simple" xlink:href="wst-20211231.xsd#SegmentInformationSegmentFinancialInformationDetails"/>
<link:calculationLink xlink:role="http://www.westpharma.com/role/SegmentInformationSegmentFinancialInformationDetails" xlink:type="extended">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_06d1e1d1-6bc5-45ad-860f-4c312f35d597" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_ff69efc2-91ec-4d5c-940c-4cb5362bae28" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NonoperatingIncomeExpense"/>
<link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_06d1e1d1-6bc5-45ad-860f-4c312f35d597" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_ff69efc2-91ec-4d5c-940c-4cb5362bae28" xlink:type="arc"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_f26f17b4-5eca-4606-9534-d68afdec51af" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
<link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_06d1e1d1-6bc5-45ad-860f-4c312f35d597" xlink:to="loc_us-gaap_OperatingIncomeLoss_f26f17b4-5eca-4606-9534-d68afdec51af" xlink:type="arc"/>
</link:calculationLink>
</link:linkbase>


5 Subsequent Filings that Reference this Filing

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 2/20/24  West Pharmaceutical Services Inc. 10-K       12/31/23  127:35M
 2/21/23  West Pharmaceutical Services Inc. 10-K       12/31/22  122:16M
10/27/22  West Pharmaceutical Services Inc. 10-Q        9/30/22   82:9.8M
 7/28/22  West Pharmaceutical Services Inc. 10-Q        6/30/22   83:9.6M
 4/28/22  West Pharmaceutical Services Inc. 10-Q        3/31/22   84:7.8M


33 Previous Filings that this Filing References

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

10/28/21  West Pharmaceutical Services Inc. 10-Q        9/30/21   83:9.7M
 5/06/21  West Pharmaceutical Services Inc. 8-K:5,9     5/04/21   13:259K
 3/01/21  West Pharmaceutical Services Inc. 8-K:5,9     2/23/21   13:402K
 2/23/21  West Pharmaceutical Services Inc. 10-K       12/31/20  129:17M
10/23/20  West Pharmaceutical Services Inc. 10-Q        9/30/20   87:11M
 7/24/20  West Pharmaceutical Services Inc. 10-Q        6/30/20   87:11M
 2/24/20  West Pharmaceutical Services Inc. 10-K       12/31/19  123:19M
 1/16/20  West Pharmaceutical Services Inc. 8-K:1,9     1/10/20   13:540K
10/16/19  West Pharmaceutical Services Inc. 8-K:1,7,9  10/15/19   14:511K
 5/08/19  West Pharmaceutical Services Inc. 10-Q        3/31/19   86:7.2M
 7/31/18  West Pharmaceutical Services Inc. 10-Q        6/30/18   73:7.8M
 6/21/18  West Pharmaceutical Services Inc. 8-K:5,9     6/21/18    3:445K
10/31/17  West Pharmaceutical Services Inc. 10-Q        9/30/17   70:6.9M
 2/28/17  West Pharmaceutical Services Inc. 10-K       12/31/16  108:13M
10/31/16  West Pharmaceutical Services Inc. 10-Q        9/30/16   67:6.8M
 4/30/15  West Pharmaceutical Services Inc. 8-K:2,5,7,9 4/24/15    5:2.6M
 4/15/15  West Pharmaceutical Services Inc. 8-K:5,9     4/13/15    3:445K
 8/01/14  West Pharmaceutical Services Inc. 10-Q        6/30/14   64:7.7M
 5/08/14  West Pharmaceutical Services Inc. 10-Q        3/31/14   64:5.9M
 2/27/14  West Pharmaceutical Services Inc. 10-K       12/31/13  110:17M
 7/10/12  West Pharmaceutical Services Inc. 8-K:1,2,7,9 7/10/12    3:3.2M
 5/06/11  West Pharmaceutical Services Inc. 8-K:5,9     5/03/11    3:278K
11/04/09  West Pharmaceutical Services Inc. 10-Q        9/30/09    6:1.1M
 5/06/09  West Pharmaceutical Services Inc. 10-Q        3/31/09    6:810K
 2/27/09  West Pharmaceutical Services Inc. 10-K       12/31/08   17:3.1M
 1/06/09  West Pharmaceutical Services Inc. 8-K:5,9     1/06/09    2:97K
 5/08/08  West Pharmaceutical Services Inc. 10-Q        3/31/08    7:883K                                   Toppan Merrill/FA
 8/03/07  West Pharmaceutical Services Inc. 10-Q        6/30/07    6:938K                                   Toppan Merrill/FA
 3/30/07  West Pharmaceutical Services Inc. DEF 14A     5/01/07    1:1.2M                                   Toppan Merrill/FA
 8/07/06  West Pharmaceutical Services Inc. 10-Q        6/30/06    8:1M                                     Toppan Merrill/FA
 5/10/06  West Pharmaceutical Services Inc. 10-Q        3/31/06    9:897K                                   Toppan Merrill/FA
 8/09/05  West Pharmaceutical Services Inc. 10-Q        6/30/05    6:895K
 5/06/99  West Pharmaceutical Services Inc. 10-K       12/31/98   12:372K
Top
Filing Submission 0001628280-22-003342   –   Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)

Copyright © 2024 Fran Finnegan & Company LLC – All Rights Reserved.
AboutPrivacyRedactionsHelp — Sat., May 11, 5:23:32.3am ET