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Time durations & decimal hours calculators
Combine durations and translate between decimal hours and hours-minutes notation.
Choose the right calculation
A duration has no time zone and can exceed 24 hours. A clock time needs a date and potentially a time zone. Decimal hours represent a fraction of sixty minutes rather than a minute remainder written after a decimal point.
Find a tool for your question
Hours Minutes to Decimal Calculator
Convert a duration in whole hours and minutes into decimal hours.
Decimal Hours to Hours Minutes Calculator
Express a non-negative decimal-hour duration as whole hours and rounded minutes.
Time Calculator
Add or subtract signed durations written as hours, minutes and optional seconds.
What does 2.25 decimal hours mean?
It means two hours and fifteen minutes. The fractional part, 0.25, is one quarter of sixty minutes.
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