Calculates the duration between two times or adds a duration to a time.
The time duration calculator finds the exact difference between two date-time values — expressed in years, months, days, hours, minutes, and seconds.
Duration = End datetime − Start datetime Convert to total seconds, then decompose into larger units top-down.
From 8:30 AM 1 March 2025 to 3:15 PM 19 June 2026: 1 year, 3 months, 18 days, 6 hours, 45 minutes.
Loading calculator…