Overtime calculator
Enter your scheduled hours and the hours you actually worked. The calculator shows your overtime and, with your hourly rate, the gross overtime pay – using the US federal rule of time and a half over 40 hours a week or a premium rate of your choice.
Example: Period: Week · Scheduled hours 40 hrs · Hours actually worked 45 hrs · Regular hourly rate (optional) 20 · Overtime rule: US federal law (FLSA): 1.5× over 40 hrs a week → Overtime: +5 hrs. Source: U.S. Department of Labor, Wage and Hour Division – Overtime Pay (accessed 27 Sep 2026). Updated: .
How it is calculated
How to calculate overtime hours
Overtime = hours worked − scheduled hours. If you are scheduled for 40 hours and work 45, you have 5 hours of overtime – 12.5% more than scheduled. A negative result means you worked fewer hours than planned.
How to calculate overtime
- Choose the period and enter your scheduled hours.
- Enter the hours actually worked – the calculator shows overtime or hours short.
- Add your regular hourly rate and the overtime rule (e.g. time and a half) to see the overtime pay.
Overtime pay formula
Overtime pay = overtime hours × hourly rate × 1.5 (time and a half). Example: 5 hours × 20 × 1.5 = 150, made up of 100 at the regular rate and a 50 premium. For double time, use a premium of 100%.
The federal rule: time and a half over 40 hours
Under the Fair Labor Standards Act (FLSA), covered non-exempt employees must be paid at least one and one-half times their regular rate for every hour over 40 in a workweek (29 U.S.C. § 207(a)(1)). The threshold is 40 hours, not your schedule: if you are scheduled for 37.5 hours and work 45, the first 2.5 extra hours are paid at the regular rate and only the 5 hours above 40 at 1.5×. At 20 an hour that is 50 + 150 = 200.
The FLSA measures overtime per workweek – hours cannot be averaged over two weeks or a month. For biweekly paychecks, calculate each week separately and add the results.
Using your own premium rate
Choose “My own premium rate” if your employer, union contract or local law pays more, or if you live outside the US. Some state laws add rules on top of the FLSA, and exempt employees (for example many salaried professionals) are not covered by the overtime requirement – check the Department of Labor pages linked below.
What the calculator does not include
All amounts are gross. Taxes and deductions depend on your situation and are not subtracted. The regular rate under the FLSA can include bonuses and shift differentials; the calculator uses the hourly rate you enter.
Related calculators: convert pay with the hourly to salary calculator, log shifts and breaks with the time card calculator, and add up hours and minutes with the hours calculator.
Frequently asked questions
How do I calculate time and a half?
Multiply your hourly rate by 1.5: 20 becomes 30 an hour. Then multiply by the overtime hours – 5 hours × 30 = 150.
When does overtime start under federal law?
After 40 hours worked in a workweek. Covered non-exempt employees must receive at least 1.5 times their regular rate for each hour over 40 (29 U.S.C. § 207).
Is overtime calculated per week or per pay period?
Under the FLSA, per workweek. Two weeks of 45 and 35 hours give 5 overtime hours in the first week, even though the total is 80 hours.
How do I calculate double time?
Choose “My own premium rate” and enter 100%. 5 hours × 20 × 2 = 200.
Does the calculator show overtime pay after taxes?
No. It shows gross pay. Withholding depends on your tax situation and state.
Can I use it outside the US?
Yes. Select “My own premium rate”, enter the rate that applies to you and read the amounts in your currency.
Sources and legal basis
- U.S. Department of Labor, Wage and Hour Division – Overtime Pay (accessed 27 Sep 2026)
- 29 U.S.C. § 207(a)(1): Fair Labor Standards Act – overtime at not less than 1.5 × the regular rate over 40 hours per workweek
- 29 CFR § 778.107: eCFR – General standard for overtime pay
As of: · Editorial policy
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