**How To Calculate Hours Worked**. To calculate in Excel how many hours someone has worked you can often subtract the start time from the end time to get the difference. Support the Team Show your love and help fund our ongoing development of the timecard calculator.

One week two weeks a month up to 31 days. Hours in a year. Hours in a month.

### Hours in a month.

8760 for a 365-day year 8784 for a 366-day year 8766 on average. The first is manually calculating hours and the second preferred method is using a time clock software Performing manual math calculations can be timely and error-prone. Definitions of terms like work day weekend and holiday can vary so this is a summary of the assumptions of this net work hours formula. Calculate Hours allows you to enter times worked like.