Time Calculator
Add and subtract durations expressed as hours, minutes, and seconds.
- Time 1 · 2h 30m2h 30m
- Time 2 · 1h 45m1h 45m
- Result · 4 h 15 m4h 15m
How it works
Convert everything to seconds, sum, and re-express as H:M:S.
2h 45m + 1h 30m = 4h 15m.
Frequently asked questions
- Handles negatives?
- Yes — the result can be a negative duration.
- Over 24 hours?
- Yes — no wrap-around.
- Fractional seconds?
- Enter decimals in the seconds field.
- Am/pm times?
- This calculator handles durations, not clock times.
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