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Time Duration Calculator

Calculators · Done in 3 steps

Stays on your deviceFree · No sign-up
  1. 1Choose a mode
  2. 2
  3. 3
Loading tool…

About

Calculate the time between two clock times — even across midnight — minus breaks, or add and subtract durations like 1h 30m + 45m.

How to use it

  1. 1Choose “Between two times” or “Add / subtract durations”.
  2. 2Enter times as 09:00, 17:30 or 9:15 pm; an end earlier than the start means the next day.
  3. 3Optionally subtract a break, or build a list of durations with + and −.
  4. 4Read the result in h:mm:ss, decimal hours and minutes.
You give
Clock times or durations (1h 30m, 1:30, 90m, 1.5h)
You get
Duration in h m s, h:mm:ss, decimal hours, minutes and seconds
Good to know
Between-times mode assumes the span is under 24 hours. For multi-day spans use the date difference calculator. Every input is saved in the page URL, so you can bookmark or share a result.
Privacy
Processed on your device. Nothing is uploaded, stored or logged.
Last tested
2026-10-28

FAQ

How do I convert minutes to decimal hours for a timesheet?

Divide minutes by 60: 7h 45m = 7 + 45/60 = 7.75 hours. The calculator shows decimal hours for every result.

What if a shift goes past midnight?

Just enter the end time; if it’s earlier than the start, the calculator adds 24 hours automatically.

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