How are overnight time spans calculated?

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Time Duration Calculator

Calculate exact elapsed hours, minutes, and decimal payroll hours between two times, including overnight spans.

Calculation Parameters

Start Time

End Time

Common Shift Presets:

Elapsed Time Duration

8h 15m

From 09:30 to 17:45. Equivalent to 8.25 decimal hours.

Decimal Hours (Payroll)8.25 hrs

Total Elapsed Minutes495 mins

Total Elapsed Seconds29700 secs

Overnight SpanNo (Same day)

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Pick clock start time.

Pick completion or end time.

See total hours and minutes plus decimal hours for payroll.

verifiedOvernight Shift Support

Correctly computes durations crossing midnight (e.g. 10:00 PM to 6:00 AM).

verifiedDecimal Payroll Hours

Instantly converts 8h 30m to 8.50 hours for payroll software.

When the end time is earlier than the start time on a clock, the calculator automatically adds a 24-hour cycle to compute elapsed duration.

Date & Time

Calculate the exact duration between two dates in total days, full weeks, months, years, and working business days.

Calculate working business days and total working hours between two dates, excluding weekends and custom holidays.

Convert and compare times across major world time zones with 24-hour timeline scrubbing and business hours badges.

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