Ot Calculator
Ot calculator works out Straight-time hours and Overtime hours from Hours worked, Base hourly rate and Regular-hour limit. The default figures on this page give total gross pay of 950.00; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
5 steps
- Straight-time hours = min(45, 40) = 40 h in the week
- Regular pay = 40 x 20 = 800
- Overtime hours = 5 h at 20 x 1.5 = 30 per hour
- Overtime pay = 5 x 30 = 150
- Total gross pay = 950
Its 5 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
3 sources
Keep this result
Save it, change one figure, then compare the two
The calculation stays free. Save this scenario, adjust one assumption, save that too, and put them side by side to see exactly what the change costs you. A free account keeps 5 scenarios and 2 comparisons; Personal makes both unlimited and adds exports and private links. Nothing is saved unless you press Save.
What the ot calculator calculates
Splits hours worked into straight-time, overtime and optional double-time bands and returns the gross pay for each band plus the total, with an optional holiday premium.
How to use this ot calculator
Enter Hours worked, Base hourly rate, Regular-hour limit and Overtime multiplier. Straight-time hours updates as you type, and “Use a worked example” loads checked figures you can adjust. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Straight-time hours, Overtime hours and Double-time hours.
The method follows 29 U.S.C. 207(a)(1) (Fair Labor Standards ACT) - not less than one and one-half times the regular rate for hours over forty in a workweek; the source of the 40-hour and 1.5x defaults, U.S. Department of Labor, Fact Sheet #23: Overtime Pay Requirements of the FLSA and California Labor Code 510(a) - one and one-half times after 8 hours in a workday and twice the regular rate after 12 hours; the source of the daily double-time preset.
Research R614-GT-1: 45 hours at 20/h, 40-hour limit, 1.5x example
With Hours worked: 45, Base hourly rate: 20, Regular-hour limit: 40, Overtime multiplier: 1.5, the calculator returns Regular gross pay: 800, Overtime gross pay: 150, Total gross pay: 950. This example is checked against an independent source in the test suite.
What you can compare
Change one input at a time to see how it affects Straight-time hours, Overtime hours and Double-time hours. The inputs you can vary are Hours worked, Base hourly rate, Regular-hour limit, Overtime multiplier, Double-time starts after and Double-time multiplier.
Understanding Straight-time hours, Overtime hours and Double-time hours
Overtime entitlement depends on your jurisdiction, your exempt/non-exempt status and any collective agreement. This tool applies the thresholds and multipliers you enter; it does not decide which ones the law requires of you.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How do I calculate my OT pay?
Splits hours worked into straight-time, overtime and optional double-time bands and returns the gross pay for each band plus the total, with an optional holiday premium. Open “How this is worked out” beside the result to see each step for your own figures.
How do I calculate my OT rate?
It needs Hours worked, Base hourly rate, Regular-hour limit, Overtime multiplier, Double-time starts after and Double-time multiplier. Nothing else is required, and the figures stay in your browser.
How do I calculate my overtime pay?
The result gives Straight-time hours, Overtime hours, Double-time hours, Regular gross pay, Overtime gross pay and Double-time gross pay, each labelled with its unit so the figure can be read on its own.
How to calculate OT per hour?
The page opens with worked default figures: total gross pay of 950.00. Replace them with your own and every figure updates as you type.
What information do I need for the ot calculator?
You need Hours worked, Base hourly rate, Regular-hour limit, Overtime multiplier, Double-time starts after, Double-time multiplier, Holiday hours and Holiday multiplier. The page opens with default figures that give total gross pay of 950.00, so you can see the scale before entering your own.
What does this ot calculator show?
It shows Straight-time hours, Overtime hours, Double-time hours, Regular gross pay, Overtime gross pay, Double-time gross pay, Holiday gross pay and Total gross pay, with the working and any warnings for your entries.