Pay & Tax

Time Card Calculator

Weekly hours from clock-in and clock-out, breaks deducted.

What it does. Enter each day’s start and finish and any unpaid break, and this totals the week, separates regular from overtime hours and multiplies out gross pay. It handles overnight shifts, where the finish time is earlier than the start.

Runs in your browserNothing uploadsNo signupWorks offline

How to use Time Card Calculator

Enter start, finish and unpaid break for each day.
Set your rate and the overtime threshold.
Read the weekly total and export it.

Decimal hours, not hours and minutes

Payroll runs on decimal hours, and this is where manual timesheets go wrong.

7 hours 45 minutes is 7.75 hours, not 7.45. Adding 7.45 across a week understates by about a third of an hour, and across a year it is real money.

The conversion is minutes ÷ 60. 15 minutes is 0.25, 20 is 0.33, 45 is 0.75. This calculator works in decimal throughout and shows both.

Breaks and rounding

Unpaid breaks are deducted from the shift, and the rules about when a break must be unpaid vary by jurisdiction — in general, short rest breaks are paid and genuine meal breaks are not.

Rounding is regulated more tightly than people expect. US rules permit rounding to the nearest quarter hour only if it is neutral over time; rounding that consistently favours the employer is unlawful, and the seven-minute convention exists because of that neutrality requirement.

If your employer rounds only downward, that is not a rounding policy — it is unpaid work.

Overnight shifts

A shift running 22:00 to 06:00 has a finish time numerically smaller than its start. Subtracting gives a negative, which is the classic timesheet error.

The correct handling adds 24 hours when the finish is earlier than the start, which this does automatically.

Worth checking on your own spreadsheet if you keep one: a formula that simply subtracts will quietly drop eight hours from every night shift.

Frequently asked questions

How do I convert minutes to decimal hours?

Divide by 60. 15 minutes is 0.25, 30 is 0.5, 45 is 0.75. Writing 7 hours 45 minutes as 7.45 rather than 7.75 is the most common timesheet error.

Can my employer round my hours?

In the US, to the nearest quarter hour only if the rounding is neutral over time. Rounding that consistently favours the employer is unlawful — a policy that only rounds down is unpaid work.

How do I handle an overnight shift?

Add 24 hours when the finish time is earlier than the start. A plain subtraction gives a negative and silently drops the shift, which is the classic spreadsheet error.

Are breaks paid?

It varies by jurisdiction, but generally short rest breaks are paid and genuine meal breaks are not. Only unpaid breaks should be deducted from the shift.

Is my timesheet data stored?

No. Everything is calculated in your browser and nothing is transmitted or saved to a server.