Work Hours & Time Card Calculator
Enter your start and end times and unpaid breaks for each day to get total hours, overtime over 40 and gross pay for the week. Overnight shifts work too.
Converting minutes to decimal hours
| Minutes | Decimal hours |
|---|---|
| 15 min | 0.25 |
| 20 min | 0.33 |
| 30 min | 0.50 |
| 40 min | 0.67 |
| 45 min | 0.75 |
Payroll uses decimal hours: 7 hours 45 minutes is 7.75 hours. Under the federal Fair Labor Standards Act, non-exempt employees earn at least 1.5 times their regular rate for hours over 40 in a workweek. Since 2025 the overtime premium (the extra half) can be deducted from federal income tax, up to $12,500 a year; see the no tax on overtime calculator.
Frequently asked questions
How do I calculate hours worked?
Subtract clock-in from clock-out and take away unpaid breaks. 8:30 AM to 5:15 PM with a 30-minute lunch is 8 h 45 m − 30 m = 8 h 15 m, or 8.25 hours.
When does overtime start?
Under federal law, after 40 hours in a workweek. California, Alaska, Nevada and Colorado also have daily overtime rules.
Are breaks paid?
Federal law treats short breaks of 5–20 minutes as paid work time. Meal breaks of 30 minutes or more can be unpaid if you're fully relieved of duty.