How to Calculate Overtime Hours

To calculate overtime hours arithmetically, compare total hours with a chosen regular-hours threshold.

Overtime hours = max(total hours − threshold, 0)

For example, if total hours are 45 and the selected threshold is 40:

45 − 40 = 5 overtime hours

Hourformula lets you edit the threshold. The calculation does not decide which threshold legally applies to a particular worker or situation.

Step 1: Start with the total hours

Use a completed worked-time total before splitting hours into regular and overtime portions.

If your source is a time card, first account for clock-in and clock-out times, overnight shifts, and any excluded breaks.

For example, a weekly worked-time total might be 45.00 hours.

The threshold is the point used to split the total into two numerical buckets.

Hourformula's Overtime Calculator starts with 40 hours as an editable default, but the field is an input rather than a legal conclusion.

If a different arithmetic scenario requires another threshold, enter that value deliberately.

Subtract the threshold from total hours.

If the result would be negative, overtime is zero.

Regular hours are the part of the total at or below the selected threshold.

Regular hours = min(total hours, threshold)

At 45 total hours with a 40-hour threshold:

The two portions should add back to the original total.

Do not produce a negative overtime value.

For 32 total hours with a 40-hour threshold:

max(32 − 40, 0) = 0 overtime hours

All 32 hours stay in the regular arithmetic bucket.

The same formula works with decimal hours.

Example:

43.75 total − 40 threshold = 3.75 overtime hours

3.75 hours corresponds to 3 hours 45 minutes.

Use the threshold that is appropriate for the arithmetic scenario you are modeling, and verify any external rule separately when it matters.