Dates calculator
Time Duration Calculator
Convert hours, minutes and seconds into one duration.
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Behind the answer
How to calculate
Total seconds = hours × 3,600 + minutes × 60 + seconds
Worked example
2 hours and 30 minutes equals 2.5 hours or 150 minutes.
What to keep in mind
Minutes and seconds may exceed 59 and are normalized in the result.
Results display up to 8 decimal places; exported numbers preserve calculation precision. This is a calculation summary, not an official certificate.