Time Card Calculator
Timesheet math has three traps that a calculator removes: subtracting lunch twice (or never), overnight shifts where the clock-out is a smaller number than the clock-in, and the hour-and-minute to decimal conversion payroll actually wants. Fill in the week's in/out pairs, set one unpaid-lunch figure, and this time card returns total hours in h m format, the decimal total for the payroll system, hours past the 40-hour overtime line, and the average day.
Empty days are simply skipped, so part-time weeks and mid-week starts work without zero-filling. Overnight shifts roll past midnight automatically, and the whole week is remembered on your device — next week you edit the days that changed instead of retyping the roster. It pairs with the hours calculator for single spans and the overtime pay calculator once the hours become money.
How to use
- Enter clock-in and clock-out for each day worked - leave days blank.
- Set the unpaid lunch minutes deducted per day (0 if none).
- Read the weekly total in hours-minutes and decimal, plus overtime over 40h.
Frequently asked questions
How do I calculate hours worked from clock times?
Convert both times to minutes since midnight and subtract: 09:00 is 540, 17:00 is 1020, and 1020 - 540 = 480 minutes = 8 hours. Overnight shifts add 24 hours to the out-time when it is smaller than the in-time; the calculator applies both rules and deducts lunch once per worked day.
Why does payroll want decimal hours?
Payroll systems multiply wage by hours as a plain number, and 7h 30m breaks that arithmetic — it must become 7.5. The decimal total here is rounded to two places, which matches typical payroll exports; the h m display stays for humans.
When does overtime start?
In the US, FLSA overtime runs past 40 hours in a workweek — daily overtime rules in states like California differ. The calculator flags everything past 40 weekly hours; multiply that figure by your 1.5x rate in the overtime pay calculator for the dollar amount.
What about breaks - are they paid?
Short rest breaks (5-20 minutes) are paid working time under FLSA; bona fide meal periods (typically 30+ minutes) are unpaid only if you are fully relieved of duty. The lunch deduction here models the unpaid meal break; paid breaks need no deduction at all.