Decimal hours converter
Convert hours, minutes and seconds to decimal hours, or reverse the conversion for a timesheet. Read the decimal result for arithmetic and the clock result for a familiar duration. Clock text rounds to the nearest second.
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How it works
Formula
Input and formula key
Your result
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Sources
- NIST — SI conversion factorsSources reviewed: 2026-10-30
Assumptions and limitations
Decimal hours use base 10; clock minutes use base 60. Clock text rounds to the nearest second. This does not apply payroll rounding or overtime rules.
How to use this tool
Set up the inputs
Choose the input format. Enter a duration, using 0–59 for minutes and seconds, or enter a decimal hour value.
Worked examples
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Enter a shift in a decimal timesheet
7 h + 30 min = 7.5 h = 450 min = 27,000 s.
Frequently asked questions
How should I read the result from Decimal hours converter?
Read the decimal result for arithmetic and the clock result for a familiar duration. 7.30 decimal hours is not 7 hours 30 minutes.
Processing and privacy
The calculation or transformation runs in your browser. The tool does not send its input values or generated output to an application server. Loading a page still makes infrastructure requests; optional analytics and Google consent messages have separate controls.
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Help and feedback
Consult the linked sources for definitions and reference data. Contact Support if you have a question or notice a problem.
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