Time Duration Calculator

Enter a start and end time and get the exact duration in hours, minutes, and seconds. It handles overnight spans too, so night shifts and cross-midnight travel times work fine.

How to use

  1. Enter your start time - you can use 24-hour format or AM/PM, either works.
  2. Enter the end time the same way.
  3. If the end time is earlier than the start time, it automatically assumes you crossed midnight.
  4. Hit Calculate for the duration in hours, minutes, and seconds.

Related tools:

Work Hours CalculatorDate DifferenceBusiness Days Calculator