SSL Certificate Checker / Utilities
Certificate Lifetime Calculator
Work out the longest lifetime allowed for a certificate issued on a given date (398, 200, 100 and then 47 days under SC-081), when to renew, and how many renewals a year that means.
- Longest allowed
- 200 days (issued from 2026-03-15)
- Expires
- 2027-06-03
- Renew by
- 2027-03-28 (two thirds of the lifetime)
- Days left today
- 199
- Renewals a year
- 1.8
| Issued from | Maximum lifetime (SC-081) |
|---|---|
| before 2026-03-15 | 398 days |
| 2026-03-15 | 200 days |
| 2027-03-15 | 100 days |
| 2029-03-15 | 47 days |
At 47 days a certificate renews about eight times a year: renewal has to be automated (ACME). Domain validation can be reused for at most 10 days from March 2029.
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The SSL Certificate Checker reads the certificate your server actually sends, its chain, revocation, CAA and renewal health.
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