Time Card Total Calculator
A daily timesheet total is the elapsed time between clock in and clock out, less any unpaid break. This calculator takes the two times and an unpaid break in minutes, then returns the paid time as decimal hours (the format payroll uses) and as hours and minutes (HH:MM). It handles overnight shifts by adding a day when clock out is earlier than clock in. Use it to check a single shift, reconcile a paper time card, or convert minutes into the decimal hours your payroll system expects. Results are exact to the minute, with no rounding applied.
Time card formula
Gross minutes = (clock out - clock in), add 1,440 if negative (overnight)
Paid minutes = gross minutes - unpaid break
Decimal hours = paid minutes / 60
HH:MM = floor(paid minutes / 60) : (paid minutes mod 60)
Times are taken in 24-hour form. The 1,440-minute (24-hour) wrap handles shifts that cross midnight. No rounding is applied; the result is exact to the minute.
Timekeeping context
- Payroll commonly pays in decimal hours: 15 minutes is 0.25, 30 is 0.50, 45 is 0.75.
- The Fair Labor Standards Act requires accurate records of hours worked for non-exempt employees.
- Short rest breaks of 5 to 20 minutes are generally treated as paid time under federal rules.
- Bona fide meal periods (usually 30 minutes or more) need not be paid if the worker is fully relieved of duty.
- Some states set their own meal and rest break rules that are stricter than the federal baseline.
Time card total: frequently asked questions
How do I calculate hours from clock in and clock out times?
Subtract the clock-in time from the clock-out time to get elapsed minutes, then subtract any unpaid break. Divide the paid minutes by 60 to get decimal hours. For example, 9:00 to 17:30 is 510 minutes; minus a 30-minute lunch leaves 480 minutes, which is 8.00 hours.
What is the difference between decimal hours and HH:MM?
Payroll usually pays in decimal hours, where 30 minutes is 0.50 hours and 15 minutes is 0.25 hours. HH:MM keeps minutes as minutes, so 8 hours 30 minutes is 8:30, not 8.30. This calculator shows both so you can match whichever your timesheet uses.
How are overnight shifts handled?
If the clock-out time is earlier than the clock-in time, the shift is treated as crossing midnight and 24 hours are added to the clock-out. So a shift from 22:00 to 06:00 counts as 8 hours, not negative time.
Does this round the time?
No. This calculator returns the exact elapsed time to the minute. If your employer rounds to the nearest quarter hour or another interval, use a rounding tool separately. Under the Fair Labor Standards Act, rounding practices must not, over time, systematically underpay employees.
Should breaks be paid or unpaid?
Under federal Fair Labor Standards Act rules, short rest breaks (commonly 5 to 20 minutes) are generally counted as paid hours worked, while bona fide meal periods (typically 30 minutes or more) need not be paid if the employee is fully relieved of duty. State rules can be stricter. Enter only the unpaid portion as the break.
Official sources
- U.S. Department of Labor: Fair Labor Standards Act (Wage and Hour Division).
- U.S. Department of Labor: Wage and Hour Division fact sheets.
Reviewed by the CalculatorHub team, edited by James Graham, 17 June 2026. See our methodology.