Clock Duration Calculator
The Clock Duration Calculator works out the elapsed time between a start and end clock time, handling times that cross midnight. Enter start and end times in 24-hour HH:MM format.
Formula
Duration = End − Start (add 24 hours if the end time is on the next day)
- Times are entered in 24-hour HH:MM format.
- If the end time is earlier than the start, it is treated as the next day.
09:00 to 17:30
Inputs
- Start Time (HH:MM): 09:00
- End Time (HH:MM): 17:30
From 09:00 to 17:30 is 8 hours 30 minutes (8.5 hours).
Frequently asked questions
Does it handle overnight shifts?
Yes. If the end time is earlier than the start, it adds 24 hours, so 22:00 to 06:00 gives 8 hours.