Time Duration Calculator
Calculate the exact duration between two clock times. Handles midnight crossovers automatically.
Time Inputs
24-hour (hh:mm:ss)
24-hour (hh:mm:ss)
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How It Works
Both times are converted to total seconds from midnight, then the difference is computed. If the end is earlier than the start, 24 hours (86,400 s) is added — indicating the end is the next calendar day.
Decimal hours = total seconds ÷ 3600. For example, 1h 30m = 1.5h — the format used in billing and payroll.
Formula
Duration = End − Start
If Duration < 0: Duration += 86400s
Decimal = Duration ÷ 3600
Disclaimer: For informational purposes only.
SponsoredAbout the Time Duration Calculator
Calculate the exact duration between two clock times. Handles midnight crossovers. Enter your values above to get instant results from this free online time duration calculator.
Use whenever you need a fast, reliable estimate without manual spreadsheet work.
Adjust the inputs above to model your specific scenario with the Time Duration Calculator.
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