Time duration calculator

Minutes and hours between two clock times, or the total of duration lines.

What do you need?

Calculated in this browser. Nothing is sent anywhere.

Clock times are 24h HH:MM (seconds are accepted and rounded). Durations may exceed 24 hours. Dates and time zones are not handled.

How to use

  1. Choose elapsed or sum mode.
  2. Enter clock times or one H:MM duration per line.
  3. Read the total in hours and minutes.

What it supports

24-hour clock times; overnight spans need the next-day option. Duration sums may exceed 24 hours. Dates and time zones are not handled.

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