Work Hours Calculator
Enter a start and end time to get the hours and minutes worked.
Type in a start time and an end time and this calculator returns the elapsed duration in hours and minutes — the number you need for a timesheet, an invoice line, or just checking how long a shift actually ran. It works out the difference in your browser as soon as both times are set, with nothing to submit.
Shifts that cross midnight
The tricky case in any hours calculation is a shift that ends the next day — clock in at 22:00 and out at 06:00 and a naive subtraction gives a nonsensical negative eight hours. When the end time is earlier than the start time, the correct reading is that the finish falls on the following day, so the real answer is eight hours. Enter the times exactly as they occurred and check the result makes sense for an overnight shift.
Remember to subtract your breaks
This gives you the gross span between clock-in and clock-out. It does not know about an unpaid lunch or rest breaks, so if your pay is based on hours actually worked, subtract those separately — a 09:00 to 17:00 day with a 30-minute unpaid lunch is 7.5 paid hours, not 8. For payroll or billing, treat the figure as the raw duration and adjust for breaks and any rounding rules your workplace uses.
Frequently Asked Questions
Does it handle overnight shifts past midnight?
Yes — when the end time is earlier than the start time, it treats the finish as the next day. So 22:00 to 06:00 correctly reads as 8 hours, not a negative number.
Are lunch and breaks taken out automatically?
No. It returns the full span between the two times. Subtract any unpaid break yourself — for example 09:00–17:00 minus a 30-minute lunch is 7.5 paid hours.
What time format should I use?
Enter both times in 24-hour format so afternoon and evening times are unambiguous (17:00 rather than 5:00).
Is my data stored anywhere?
No. The calculation happens in your browser and nothing is sent or saved.