Work Hours and Timecard Calculator
Calculate shift length and paid work hours from clock-in, clock-out and an unpaid break, including overnight shifts.
Set your values
Adjust the values, then calculate your result.
How to use Work Hours and Timecard Calculator
- Enter the measurements or amounts in the fields above.
- Check that dimensions, rates and units match the labels.
- Select “Calculate work hours” to see a clear estimate and the formula used.
How the work hours and timecard calculator works
Elapsed shift time is the difference between clock-out and clock-in; when the end time is earlier, the shift is treated as crossing midnight. Paid time subtracts the unpaid break.
Check your measurements and assumptions
Enter local clock times in HH:MM. This calculates duration only; it does not determine overtime, payroll rounding or employment-law requirements.
Review the estimate before you act
Compare this result with an independent measurement, supplier quote or institution guidance when the decision matters. Confirm that the units and assumptions match the labels above, and update the inputs when the conditions change. Keep a note of the values used so you can reproduce the estimate later. This calculator is a planning aid and does not replace professional, product-specific or local guidance.
How do I calculate hours worked overnight?
If clock-out is earlier than clock-in, the calculator treats clock-out as the following day.
Is input uploaded?
Processing takes place in your browser. This tool does not send your input or selected files to a conversion API.