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Time Duration Calculator

Enter a start and end time to get the duration in hours and minutes (and decimal hours). Handy for shifts, study sessions and timing tasks.

How to use the Time Duration Calculator

  1. Enter start and end times.
  2. Tick overnight if needed.
  3. Click Calculate for the duration.

100% free, no sign-up, and it all runs in your browser — your data never leaves your device.

FAQ

How do I handle an overnight shift?

Tick "End is next day" when the end time is earlier than the start (e.g. 10pm to 6am), and it adds the 24-hour rollover for you.

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