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Overtime Hours Calculator

Work out overtime hours from total hours worked against the contracted threshold.

About Overtime Hours Calculator

Overtime is the excess of hours worked over the contracted threshold. The compliance check matters because most jurisdictions cap average weekly hours, and averaging over a reference period is what makes an occasional long week acceptable. Sustained overtime above about a fifth of hours worked is a reliable predictor of burnout and attrition, well before it becomes a compliance problem.

Formula

Overtime Hours

Overtime hours = hours worked − contracted hours, floored at zero

permitted maximum
Statutory weekly ceiling, commonly 48 hours averaged over a reference period

Worked example

With the default values below, Overtime Hours Calculator returns Overtime Hours per Week of 8.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Total hours worked in the weekaccepts 0–120 h
48 h
Contracted hours per weekaccepts 0–80 h
40 h
Weeks in the periodaccepts 1–52 weeks
4 weeks
Maximum permitted weekly hoursaccepts 0–100 h
48 h

Results

Overtime Hours per Week
8.00 h
Overtime Hours in the Period
32.00 h
Overtime as Share of Hours Worked
16.67%
Hours Above the Permitted Maximum
0.00 h
Compliance Status
Within limits

Step by step

  1. 1Values used
  2. 2Overtime Hours
  3. 3Overtime Hours per Week= 8.00 h
  4. 4Overtime Hours in the Period= 32.00 h
  5. 5Overtime as Share of Hours Worked= 16.67
  6. 6Hours Above the Permitted Maximum= 0.00 h
  7. 7Compliance Status= Within limits

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax or fees or charges into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is Overtime Hours calculated?

Overtime hours = hours worked − contracted hours, floored at zero Overtime is the excess of hours worked over the contracted threshold. The compliance check matters because most jurisdictions cap average weekly hours, and averaging over a reference period is what makes an occasional long week acceptable.

Why does Overtime Hours matter?

Sustained overtime above about a fifth of hours worked is a reliable predictor of burnout and attrition, well before it becomes a compliance problem.

What values do I need to enter?

This calculator takes 4 inputs: Total hours worked in the week, Contracted hours per week, Weeks in the period, Maximum permitted weekly hours. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.

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