Time Duration Calculator
Calculate the duration between two times or dates in hours, minutes, and seconds.
Result
Fill in the fields above, then press Calculate.
A time duration calculator measures the exact elapsed time between two date-time stamps, broken down into years, months, days, hours, minutes, and seconds.
Examples
From Jan 1 to Dec 31
Start: 2024-01-01 08:00, End: 2024-12-31 17:00. Duration: 11 months, 30 days, 9 hours = 365 days 9 hours total.
Frequently Asked Questions
Does this account for leap years?
Yes. The calculation uses JavaScript Date objects which correctly handle leap years, so February 29 is properly included in leap years.
What about time zones?
This calculator works with local time. For time zone conversions, use the Time Zone Calculator.
Result
Your result appears here and follows you as you scroll.
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Quick Tips
- •Use this to count down to events or measure project timelines.
- •Times are in 24-hour format for clarity.
- •The calculator handles dates where the end is before the start by showing the absolute duration.