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Time Duration Calculator
Calculate the hours and minutes between two times, including overnight.
Duration
8h 30m
= 510 minutes = 8.50 hours
If the end time is earlier than the start, it's treated as crossing midnight (e.g. a night shift).
🔒 This tool runs entirely in your browser. Your data is never uploaded.
Frequently asked questions
Does it handle overnight times?＋
Yes — if the end time is earlier than the start, it's treated as crossing midnight.
What does it output?＋
The duration in hours and minutes, plus total minutes and decimal hours.