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9pm to 5am Is How Many Hours?

Hours and minutes between two clock times — overnight included — plus adding or subtracting hh:mm durations.

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Calculating the duration
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Result

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.

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Accepted Formats & Rules

  • Time between two clock times with optional break
  • Add or subtract two hh:mm durations
  • Results in hh:mm, decimal hours, and minutes

Key Benefits

✓ Overnight spans are detected automatically when the end time is earlier than the start.
✓ Every result comes in hh:mm, decimal hours, and total minutes at once.
✓ A second mode adds or subtracts two hh:mm durations without base-60 mistakes.

Use Cases

  • • Find out exactly how long a shift lasts: pick the start and end times, subtract the lunch break, and read the result in hh:mm and decimal hours.
  • • Calculate an overnight span like 9pm to 5am — the calculator adds 24 hours automatically when the end time is earlier than the start.
  • • Add two hh:mm durations, such as timesheet entries or flight legs, with minutes carried correctly instead of decimal guesswork.