The formula to calculate the number of workdays for any period where the start of the period is in cell `A2` and the end is in cell `B2` with ``` =NETWORKDAYS(A2,B2) ``` To get the number of workdays in a month input the first day of the month in cell `A2` and use `EOMONTH(A2,0)` to get the last day of the month. ``` =NETWORKDAYS(A2, EOMONTH(A2,0)) ``` To calculate the number of workable hours in a month multiply by 8. ``` =NETWORKDAYS(A2, EOMONTH(A2,0)) * 8 ```