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Time Duration Calculator

Add or subtract multiple time durations. Enter hours, minutes, and seconds —toggle + / ∀for each row to get the total time instantly.

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00:00:00
Total Duration (HH:MM:SS)
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Hours
0
Minutes
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Seconds

What is Time Duration Calculator?

Time Duration Calculator computes the exact duration between two times or dates, returning the result in hours, minutes, and seconds. Supports both same-day and multi-day spans.

How to Use the Time Duration Calculator

  1. Enter hours, minutes, and seconds in each row.
  2. Toggle the +/∀sign to add or subtract that duration.
  3. Click Add Row for more entries. The total updates instantly.

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Common Use Cases
  • Add up video editing clip durations
  • Calculate total work hours from individual session times
  • Find remaining time after subtracting completed segments
  • Sum up workout or activity durations
Frequently Asked Questions
Can I add more than two durations?

Yes. Click 'Add Row' for as many entries as needed.

How does subtraction work?

Toggle the sign on any row to '∀ to subtract that duration from the running total.