How this calculator works
An end time earlier than the start is interpreted as the next day. Equal start and end mean zero duration, not a 24-hour shift. This is clock arithmetic for a shift shorter than one day; it does not account for daylight-saving transitions, overtime rules or payroll rounding.
The formula
Elapsed minutes = end − start; add 1,440 if negative. Net minutes = elapsed − break. Decimal hours = minutes/60.A quick example
A shift from 22:00 to 06:00 spans eight hours. After a 30-minute unpaid break, net time is 7.5 hours.
How to use this calculator
- Choose the settings that match your scenario, using the units shown beside each field.
- Enter start time, end time, unpaid break (minutes).
- Calculate, then review the method and assumptions alongside the results.
A few common questions
Can I use this as a simple time-duration calculator?
Yes. Set the break to zero to keep the full interval.
Does 7.5 mean seven hours and fifty minutes?
No. Decimal 7.5 hours means seven hours and thirty minutes.