Do I need to install anything to use Duration Calculator?

No installation needed. Duration Calculator works directly in any modern web browser — Chrome, Firefox, Safari, or Edge.

Can I use this on mobile devices?

Yes, this tool works on any device with a modern browser including phones and tablets.

Add or subtract time durations. Enter hours, minutes, and seconds to get a running total.

H: M: S:

No entries yet. Add a duration above.

00:00:00

0 seconds

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