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
Results are estimates for general information only and are not professional financial, medical, tax, or legal advice. Read the full disclaimer.
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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