Time Duration Calculator
Work out how long a shift, meeting or trip lasts.
Duration
8h 0m
Decimal hours
8
Minutes
480
Runs in your browser. Nothing you enter is sent or stored.
How it works
The end time minus the start time gives the duration. If the end is earlier than the start, the period is assumed to cross midnight. Break minutes are subtracted.
Example
09:00 to 17:30 with a 30-minute break is 8 hours (8.00 decimal hours).
Frequently asked questions
Does it handle night shifts?
Yes. 22:00 to 06:00 is calculated as 8 hours.
What are decimal hours?
Hours as a decimal number, e.g. 7h 30m = 7.5 hours, handy for timesheets.
Can it handle durations longer than 24 hours?
No, it covers periods within one 24-hour cycle.