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Salary, Payroll & Tax

Overtime Hours Calculator

Count overtime hours for a week from daily hours using weekly, daily or combined daily-then-weekly rules.

Your inputs

Results

Overtime hours

3

Regular hours
39
Total hours
42

✓Exact calculation — rounded only for display

Notes for this result

  • Overtime rules depend on your jurisdiction and contract. Check which thresholds legally apply to you.

Inputs are never added to links for financial, salary or health calculators.

What this calculator does

Some rules pay overtime after a weekly total (e.g. 40 hours), others after daily hours (e.g. 8 per day), and some apply both. The combined rule counts daily overtime first and then weekly overtime on the remaining hours to avoid double counting.

Formula and method

Daily OT = Σ max(0, dayHours − daily threshold) Combined OT = daily OT + max(0, total − daily OT − weekly threshold)

Worked example

Calculated by this tool with its default inputs:

Inputs

  • Hours worked each day of the week: 9, 10, 8, 8, 7, 0, 0
  • Overtime rule: Daily first, then weekly on remaining hours
  • Daily threshold: 8
  • Weekly threshold: 40

Results

  • Overtime hours: 3
  • Regular hours: 39
  • Total hours: 42

How to read the results

Check which rule applies to you before relying on the figure.

Assumptions and limitations

  • Double-time and seventh-day rules used in some places are not modelled.

Tax and payroll figures depend on rules that differ by country, region and year and change often. Enter official current rates, and consult the tax authority or a qualified adviser — nothing here is tax advice.

Questions

Why does the combined rule subtract daily overtime first?

So the same hour is not counted as overtime twice.

Methodology and verification

Result type
Exact mathematical calculation (rounded only for display)
Formula version
1.0
Automated verification
5 reference and validation test cases, checked against independently computed values. The site cannot be built if any of them fail.
Editorial review
Awaiting human editorial review. The explanation was drafted with AI assistance; the formula and examples are verified by the automated tests above.

Privacy

Everything you enter is calculated in this browser and is not sent to Numerith or anyone else. Because this calculator can involve personal financial or health details, your inputs are never added to share links or saved to history. Privacy policy