Math

Hours calculator.

The time between two times, minus breaks — in hours, minutes and decimal.

From clock times to a timesheet

Enter a start and end time and the calculator returns the gap, subtracts any unpaid break, and shows the result two ways: as hours and minutes, and as decimal hours — the format payroll and invoicing systems expect, where 8 hours 30 minutes is 8.5, not 8.30. The conversion trips people up because there are 60 minutes in an hour, not 100: to convert minutes to decimal, divide by 60 (45 minutes ÷ 60 = 0.75). If the end time is earlier than the start, the calculator assumes the shift ran past midnight and counts it as overnight, so a 10 pm to 6 am shift comes out as 8 hours. It's built for timesheets and shift totals; for a single day's worth of multiple entries, run each and add the decimals. To count whole days instead of hours, see the date calculator.

FAQ

How do I calculate hours between two times?
Enter the start and end time; the calculator returns the duration, minus any break, in hours and minutes and as decimal hours. If the end is before the start it's treated as an overnight shift.
How do I convert minutes to decimal hours?
Divide the minutes by 60. So 30 minutes is 0.5, 15 minutes is 0.25, and 45 minutes is 0.75 — which is why 8 hours 30 minutes is written as 8.5 decimal hours.

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