About this calculator

Use your clock-in and clock-out times to make a weekly, biweekly or calendar-month timesheet, then check its worked hours against the hours on your payslip or pay stub.

How the hours add up

We measure the interval between the start and end of each shift in whole minutes, then subtract the unpaid break you enter. A 9 am to 5 pm shift with a 30-minute unpaid lunch contributes 450 minutes. That is 7 hours 30 minutes, or 7.50 hours in decimal form.

We add the minutes across the period before displaying decimal hours. This keeps daily rounding from accumulating. Overnight shifts belong to the date they started. Check shifts that cross a clock change against a time record that includes the time zone.

What the comparison tells you

The difference is a duration. A timesheet that is 45 minutes higher than a pay stub tells you how much time to look for. You still need the original shift records to find the cause. Your employer’s pay rules determine things such as overtime rates, paid leave and which breaks count towards pay.

How we write the guides

Our worked examples use illustrative shifts and show the arithmetic so you can check each step. The guides link to sources for clock changes, decimal conversions and payroll terminology. Start with the guide that matches your question, then use your own dates and shifts in the calculator.

Who runs this site

Tally My Shift is an independent, free website. It is not affiliated with any employer, payroll provider or government agency. The calculator has no accounts and keeps your entries in your browser; see the privacy page. Spotted a mistake or want a guide on another question? Get in touch.