hours
minutes
seconds
hours
minutes
seconds
Result
โ
How time math works
Seconds, minutes and hours are added or subtracted with carry-over (60 seconds = 1 minute, 60 minutes = 1 hour). For between two times, the start is subtracted from the end; an earlier end is counted as the next day, so overnight shifts work too.
FAQs
Add each unit and carry over: 2h 30m + 1h 45m = 4h 15m.
End minus start. 22:00 to 06:00 = 8h (overnight).