Explosion Tools

Time Duration Calculator

Add or subtract hours, minutes, and seconds to calculate total duration.. Gratuit, sans inscription, fonctionne dans votre navigateur.

Formats: HH:MM, HH:MM:SS, or plain minutes. Prefix with - to subtract.

Total (3 entries)
4h 30m
4.50 decimal hours
Entry breakdown
1:301h 30m
0:450h 45m
2:152h 15m

All calculations happen in your browser. No data is sent to any server.

À propos de Time Duration Calculator

This free time duration calculator adds or subtracts multiple time values in hours, minutes, and seconds. Enter durations line by line to get a cumulative total. Useful for tracking project time, exercise sessions, video editing, cooking times, and travel planning.

Questions fréquentes

How do I add multiple durations?
Enter each duration as hours:minutes:seconds (e.g., 1:30:00 for 1 hour 30 minutes). The calculator sums all entries.
Can I subtract time?
Yes. Prefix a duration with a minus sign (-1:30:00) to subtract it from the total.
What formats are supported?
Enter time as HH:MM:SS, HH:MM, or just minutes. The calculator auto-formats and converts between units.

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