Time Calculator
Add or subtract time durations, or find the elapsed time between two clock times.
About this tool
Adding 2h 45m and 1h 30m in your head is annoying because minutes roll over at 60, not 100. This tool adds and subtracts durations properly, carrying seconds into minutes and minutes into hours.
The second mode finds the elapsed time between two clock times — useful for shift lengths, travel time, or "how long was that meeting, really".
How to use
- For durations: enter two durations and choose add or subtract.
- For elapsed time: pick the start and end clock times.
- Read the result in hours, minutes, and seconds.
Frequently asked questions
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