EachCalculatorTime Calculator
Add or subtract two time durations (hours, minutes, and seconds) — useful for totaling work hours, cooking times, or workout splits.
Duration A
Operation
Duration B
Result
2h 16m 15s
How It Works
Converting to seconds
Both durations are converted to total seconds first, then added or subtracted, then converted back into hours, minutes, and seconds.
Handling negative results
If subtracting a longer duration from a shorter one, the result is negative — the calculator shows this clearly rather than an confusing raw negative number.
Example Calculation
1 hour 45 minutes 30 seconds plus 30 minutes 45 seconds equals 2 hours 16 minutes 15 seconds.
Common Mistakes
- Forgetting that minutes and seconds carry over into the next unit at 60, not 100 — time isn't decimal.
- Mixing up which duration is first vs. second when subtracting, which flips whether the result is positive or negative.
Frequently Asked Questions
- Can I use this to total up work hours?
- Yes — enter each duration you want to add together; for more than two durations, add them one pair at a time.