Explosion Tools

Time Duration Calculator

Add or subtract hours, minutes, and seconds to calculate total duration.. Kostenlos, ohne Anmeldung, funktioniert im Browser.

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.

Über 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.

Häufig gestellte Fragen

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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