In short: A time card calculator adds up hours worked from clock-in and clock-out times, subtracts unpaid breaks, handles shifts past midnight and totals the week in hours:minutes and decimal hours.
About Hours & Time Card Calculator
Filling in a timesheet means turning clock times into hours, which is where mistakes creep in: 8:45 to 17:15 with a 30-minute lunch is 8 hours, not 8.3. This calculator does the time arithmetic for each day, subtracts breaks and gives the weekly total both as hours and minutes and as decimal hours — the format payroll systems usually want.
If an end time is earlier than the start time, the shift is treated as crossing midnight (for example 22:00 to 06:00 is 8 hours). Add an hourly rate to see gross pay, with hours above the weekly overtime threshold paid at 1.5×.
How to use Hours & Time Card Calculator
- Enter start and end times for each day you worked, and the unpaid break in minutes.
- Read each day’s hours and the weekly total.
- Optionally enter your hourly rate to estimate gross pay including overtime.
Examples
08:45 – 17:15 with a 30 min break = 8:00 hours (8.00 decimal).
22:00 – 06:30 with 30 min break = 8:00 hours.
Frequently asked questions
How do I convert minutes to decimal hours?
Divide by 60: 45 minutes = 0.75 hours, so 7 h 45 min = 7.75 hours.
Are breaks paid?
It depends on your employer and local law. Enter only unpaid break time in the break column.
How is overtime calculated?
Hours above the weekly threshold (40 by default, the US federal rule) are paid at 1.5× your rate. Some states, like California, also have daily overtime rules that are not modelled here.
Is my timesheet saved?
No. Nothing is stored; refreshing the page clears it.
Updated November 2026 · Free, no signup · How we build and test tools