Time Calculator
Add and subtract clock times (hours and minutes).
Guide: Time Calculator
Add two durations given in hours and minutes, for example combining study blocks or production shifts. Results are expressed in total hours and minutes. Duration math is subtly different from clock math: 25 hours is a valid duration even though a wall clock only shows 0–23 in a single day.
Overflow beyond 24 hours
The tool totals minutes and normalizes into hours. It does not wrap to clock time; that is intentional for duration math.
If you later need wall-clock arrival time, add the duration to a starting timestamp in a calendar app with timezone awareness.
Subtracting durations
When the UI supports subtraction, watch for negative totals if the second block exceeds the first—some workflows use that to detect schedule overruns.