Workforce certification expiry calendar calculator

Calculate renewal initiation dates by certificate and certificates whose initiation date is on/before audit with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use renewal initiation dates by certificate and certificates whose initiation date is on/before audit to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Certificates: ID, role, current expiry inclusive, renewal lead days, planned renewal completed date or none, renewed expiry inclusive or none
A,Fork,2026-10-20,10,2026-10-22,2027-10-22 B,Fork,2026-10-25,5,none,none C,Medic,2026-10-19,7,2026-10-19,2027-10-19
Required current certificates: role, count
Fork,2 Medic,1
Audit date
2026-10-20
Renewal initiation dates by certificate
A: 2026-10-10; B: 2026-10-20; C: 2026-10-12
Certificates whose initiation date is on/before audit
A, B, C
Current supplied coverage by role
Fork: 2; Medic: 1
Current certificate shortfall by role
Fork: 0; Medic: 0
Inter-renewal uncovered calendar days by certificate
A: 1; B: Unknown: no renewal planned; C: 0

Try another scenario

Certificates: ID, role, current expiry inclusive, renewal lead days, planned renewal completed date or none, renewed expiry inclusive or none
A,Fork,2026-10-20,10,2026-10-22,2027-10-22 B,Fork,2026-10-25,5,none,none C,Medic,2026-10-19,7,2026-10-19,2027-10-19
Required current certificates: role, count
Fork,2 Medic,1
Audit date
2026-10-21
Renewal initiation dates by certificate
A: 2026-10-10; B: 2026-10-20; C: 2026-10-12
Certificates whose initiation date is on/before audit
A, B, C
Current supplied coverage by role
Fork: 1; Medic: 1
Current certificate shortfall by role
Fork: 1; Medic: 0
Inter-renewal uncovered calendar days by certificate
A: 1; B: Unknown: no renewal planned; C: 0
Calculation method

Calculation method

Renewal initiation dates by certificate

Current inclusive expiry minus supplied lead days.

Certificates whose initiation date is on/before audit

Compare the initiation date to the audit date, including previously completed renewals.

Current supplied coverage by role

Count an old certificate through expiry, or a renewed certificate from completion through its supplied new expiry; count each record at most once.

Current certificate shortfall by role

max(0,required count−current certificate records).

Inter-renewal uncovered calendar days by certificate

max(0,completion−old expiry−1); an unplanned renewal has an unknown future gap.

Symbols and units
a
Certificates: ID, role, current expiry inclusive, renewal lead days, planned renewal completed date or none, renewed expiry inclusive or none
b
Required current certificates: role, count
c
Audit date

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • A supplied certificate-calendar scenario. Records represent independently valid coverage units; role qualification, initial validity and renewal approval are not inferred. Future renewal completion dates are assumptions, not completed actions.
Are these inputs private?

These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.

Further reading

ILO: supplied workforce records and full-time-equivalent measurement background ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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