Time Calculator
The Time Calculator adds or subtracts two durations made up of hours, minutes, and seconds — useful for totaling shifts, cooking times, or any clock-based math.
Result
--
Total Seconds--
Decimal Hours--
How it works
Each duration is converted to total seconds, added or subtracted, and converted back into hours, minutes, and seconds:
Total Seconds = (Hours × 3600) + (Minutes × 60) + Seconds
Example: 2h 30m plus 1h 45m equals 4h 15m (4.25 decimal hours).
Related tools
To total hours worked between a start and end clock time (with breaks), use the Hours Calculator. For calendar date math, see the Date Calculator.