Check your paycheck before payday. Enter your hourly rate and the hours you actually worked, and the calculator splits them into regular hours and overtime hours, then adds up what each is worth. Overtime starts after 40 hours in most US jobs, but you can change that — tap 8 h/day if you are working out a single long shift under a daily overtime rule. Pick 1.5× for time and a half or 2× for double time, or type any multiplier your employer uses. Everything shown is gross pay, before tax and deductions.
How it works: Overtime hours are whatever you worked above the threshold, so regular pay = min(hours, threshold) × rate and overtime pay = extra hours × rate × multiplier. Federal FLSA rules set time and a half after 40 hours in a workweek, but some states add daily overtime and your official “regular rate” can include certain bonuses and shift premiums — check your pay stub or employer’s policy if the numbers do not line up.