Shift Duration and Break Deduction Calculator
Works out the hours in one shift, with unpaid breaks taken off.
Hours worked, after breaks
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Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
In decimal hours — hours
Shift length, before breaks —
Break deducted —
Hours per week — hours
Reading this —
The formula
hours worked = end − start − break if the end is earlier, add 24 hours
Times are converted to minutes since midnight. A clock change during a night shift makes it an hour longer or shorter.
What to watch out for
For different hours each day, use the timesheet calculator.
Frequently Asked Questions
How many hours is a night shift from 22:00 to 06:00?
8 hours before breaks, or 7 hours 30 minutes with a 30-minute unpaid break.
How many hours is 9 to 5 with a lunch hour?
7 hours worked out of 8 hours. Over 5 days that is 35 hours.