Work hours calculator
Calculate working time after unpaid breaks for a daytime or overnight shift.
Time math
Calculate the hours and minutes between two clock times, including overnight periods.
510 minutes · fixed clock arithmetic
Find how long a shift, class, or activity lasts from its start and end clock readings. Select Next day when the end belongs to the following day.
Worked example
09:00 to 17:30 is 8 hours 30 minutes. 22:00 to 06:00 on the next day is 8 hours.
This is clock arithmetic over at most 24 hours. Use the time-zone converter for real instants across a daylight-saving transition.
Use Copy result to copy the displayed answer. Share link preserves the inputs so someone else can open and edit the calculation. This link does not start timing or request permissions.