Time Duration Calculator
Find the time between two clock times, including overnight shifts and breaks.
About the Time Duration Calculator
Enter a start and end time in 24-hour format and any break in minutes. The calculator gives the duration in hours and minutes, in decimal hours and in minutes, with a clock showing the span.
If the end time is earlier than the start time, the calculator assumes it's the next day, as for a night shift.
The formula
Duration = end − start (+24 h if past midnight) − breaks
Worked example
A night shift from 22:00 to 06:30 with a 30-minute break
- 06:30 is earlier than 22:00, so add 24 hours: 8 h 30 min
- Minus the break: 8 h 0 min
- 8 decimal hours, 480 minutes
Things to keep in mind
- Covers up to 24 hours. For longer spans across several days, use the Time Calculator.
Questions people ask
How do I convert to decimal hours?
Divide the minutes by 60: 7 h 25 min = 7.42 h.
Does it handle daylight saving?
Not for clock times alone; on the night clocks change, add or subtract an hour.
How do I enter 2:30 pm?
As 14:30. Add 12 to afternoon hours.