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Overtime hours calculator online

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

Result

Overtime, hours

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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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