9pm to 5am Is How Many Hours?
Measure a clock span, including overnight, or add and subtract hh:mm durations. 09:00 to 17:00 is 8:00. A 30-minute break makes it 7:30.
Processed entirely in your browser — nothing you enter here is ever uploaded.
Result
About this tool
From 9:00 in the evening to 5:00 the next morning is exactly 8 hours. This page opens the duration calculator with 21:00 and 05:00 preloaded — and because the end time is earlier on the clock, the tool automatically counts the span across midnight instead of producing a nonsense negative number.
Night-shift arithmetic is where manual timesheets fail most often. The overnight 9-to-5 counts 3 hours before midnight and 5 after; take a 30-minute unpaid break at, say, 1am and the worked total becomes 7.5 hours — 7:30 in hh:mm. Enter your break in minutes and the calculator deducts it for you.
The result also appears as decimal hours and total minutes, ready for payroll systems and night-differential calculations. Any other overnight pair — 22:00 to 6:00, 23:30 to 7:15 — works the same way, locally in your browser.
Example. 09:00 to 17:00 is 8:00, 480 minutes, 8.00 hours. A 30-minute break makes 7:30, 450 minutes, 7.50 hours. 21:00 to 05:00 is an overnight 8:00.
Limit. Clock times are 00:00–23:59. A break longer than the span is rejected. 09:00 to 09:00 is zero, not 24 hours. Durations can be negative when you subtract.