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04:30:00

Time Duration Calculator

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Enter a start time and an end time to see elapsed hours, minutes, and seconds — including overnight (11pm to 2am) and stacked timesheet segments.

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Durations (one per line — HH:MM or HH:MM:SS)
Total
04:30:00
= 4.5 hours · 16200 seconds

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<iframe
  src="https://tools.town/embed/time-duration-calculator/"
  width="100%"
  height="600"
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  loading="lazy"
  title="Time Duration Calculator">
</iframe>

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Need hours between two times? This time duration calculator subtracts start from end and shows hours, minutes, and seconds. Turn on spans midnight for overnight shifts; add segments for a timesheet total.

How to use

  1. Enter a start time and an end time (HH:MM:SS format).
  2. Toggle spans midnight if the end time is on the next day.
  3. See the duration in hours, minutes, and seconds.

When to use

Timesheets, shift calculations, meeting duration tracking, or any time you need the elapsed time between two clock readings.

Frequently Asked Questions

Does it handle overnight durations (e.g. 11pm to 2am)?
Yes — toggle 'spans midnight' and the calculator handles next-day end times correctly.
Can I add multiple time segments?
Yes — use multi-segment mode to add up several time ranges (useful for timesheet calculations).
Is anything sent to a server?
No. All calculations run in your browser.
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