How to use the Overtime Calculator
This calculator applies the standard overtime pay formula used across payroll and HR: multiply your hourly rate by an overtime multiplier, then by the number of overtime hours worked, and add that to your regular pay. Enter your hourly rate, regular hours, overtime hours, and multiplier to see overtime pay, regular pay, and total gross pay for the period.
The overtime pay formula
Overtime pay = Hourly rate × Overtime multiplier × Overtime hours. Regular pay = Hourly rate × Regular hours. Total gross pay is simply the two added together: Regular pay + Overtime pay. The calculator also reports an effective hourly rate, which is total pay divided by total hours worked — a single blended number useful for comparing weeks with different amounts of overtime.
Time-and-a-half vs. double-time
Under the U.S. Fair Labor Standards Act (FLSA), most nonexempt employees must be paid at least 1.5 times their regular rate ("time-and-a-half") for hours worked beyond 40 in a single workweek. Double-time (2x) is not required by federal law, but some states — notably California, for hours beyond 12 in a day or the 7th consecutive workday — and some union contracts require it. Select the multiplier that matches your situation, or use 1x to see straight-time pay for comparison.
Worked example
At a $22.50/hr rate with 40 regular hours and 8 overtime hours at 1.5x: overtime pay is $22.50 × 1.5 × 8 = $270.00. Regular pay is $22.50 × 40 = $900.00. Total gross pay for the week is $1,170.00, and the effective hourly rate across all 48 hours worked is $1,170.00 ÷ 48 = $24.38/hr.
What this calculator does not include
This tool computes gross overtime pay only. It does not calculate tax withholding, deductions, or take-home pay, and it does not determine whether a given employee is legally exempt or nonexempt from overtime rules — that depends on job duties, salary level, and applicable state law. Check your state labor department or a payroll professional for rules specific to your situation.