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Overtime hours calculator

Enter the scheduled hours norm and the actual hours worked over the same period. The calculator works out the overtime.

Result

Overtime, hours

Your inputs are stored in this browser, so everything is still here next time. Nothing is sent to a server.

This calculation is for informational purposes only and does not replace advice from a qualified professional. Formulas and rates may not fit your exact situation — double-check the figures before making decisions.

How it is calculated

Overtime = actual hours worked − scheduled hours norm, floored at zero: if an employee worked less than the norm, that's a shortfall or absence, not negative overtime.

The norm and the actual hours need to come from the same period — usually a month, but it could be a week or a quarter depending on how working time is tracked. Mixing periods (say, a monthly norm against a weekly actual) gives a meaningless result.

This calculation gives hours only, not money — to convert overtime into pay with premium multipliers, use the overtime pay calculator.

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