Time to Live (TTL) Calculator
Convert Time to Live (TTL) values between raw seconds and human-readable duration. Built for DNS records, with quick presets for sysadmins and DevOps teams.
Raw Seconds
Quick Presets
Human Readable
TTL Expiry
Expires at
8/6/2026, 10:32:00 PM
Time remaining
59 minutes and 24 seconds
3,600
seconds
Common TTL Values
How It Works
Time to Live (TTL) is a duration in seconds that controls how long cached data remains valid. In DNS, TTL tells resolvers how long to cache a record before requesting a fresh copy. This tool converts between raw seconds and human-readable time for easy configuration.
Lower TTLs (300s) mean faster DNS propagation but more queries to your nameservers. Higher TTLs (86400s) reduce load but slow down changes.
Best Practices
Last Updated: August 2026
About the Time to Live (TTL) Calculator
Converts Time to Live (TTL) values between raw seconds and human-readable duration (days, hours, minutes, seconds). Also calculates when a TTL expires from a given start time.
Use when configuring DNS records (A, CNAME, MX, TXT), planning migrations, or verifying cache durations. DNS providers require TTL in seconds — this tool eliminates conversion errors.
A TTL of 86400 seconds equals 1 day. Lower it to 300 seconds (5 minutes) 24–48 hours before a DNS migration for faster propagation.
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