About This Calculator
Track SSL certificate expiration with this free online calculator. It provides accurate, instant results to help you manage your SSL certificates and avoid unexpected expirations that could harm your website's security and SEO rankings.
Why SSL Certificates Matter
SSL certificates encrypt data between your website and visitors, ensuring secure communications. An expired SSL certificate will:
- Display security warnings to visitors
- Hurt your SEO rankings
- Potentially lose customer trust
- Break secure connections to your site
Pro Tip
Set a calendar reminder 30 days before your SSL certificate expires. Most certificate authorities allow you to renew early without losing any validity days - they'll simply add to your existing certificate time.
Understanding SSL Validity Periods
Since September 2020, SSL/TLS certificates have a maximum validity period of 398 days (approximately 13 months). This was reduced from the previous 825 days to improve security. Different certificate types have varying validity periods:
- Let's Encrypt: 90 days (free)
- Standard DV/OV: Up to 398 days
- Extended Validation (EV): Up to 398 days
- Wildcard: Up to 398 days
How to Check Your Current SSL Certificate
To find your current certificate's issue date, click the padlock icon in your browser's address bar and view the certificate details. You'll see both the issue date and expiration date listed there.