The Excel Networkdays function calculates the number of whole work days between two supplied dates. This includes all weekdays (Mon - Fri), excluding a supplied list of holidays.
The format of the function is:
The start of the period for which we are counting days(the start date is counted in the returned number of days)
The end of the period for which we are counting days(the end date is counted in the returned number of days)
|[holidays]||-||An optional argument, which specifies an array of dates (in addition to weekends) that are not to be counted as working days|
Note that the start_date, end_date and [holidays] arguments should be input as either:
- If you attempt to input these date arguments as text, Excel may misinterpret them, due to different date systems, or date interpretation settings.
Warning: Although you can input date arguments as date serial numbers, this is not recommended as date serial numbering does vary across different computer systems.
The spreadsheets below show simple examples of the Excel Networkdays function calculating the number of work days between the two dates 01-Dec-2010 and 05-Jan-2011.
The format of the function is shown in the top spreadsheet and the results are shown below.
In the above spreadsheet :
Note also that, as recommended by Microsoft, in all three calls to the Networkdays function, the start_date, end_date, and [holidays] arguments have been supplied as either cell references or the return value from a function (in this case the Excel Date function).
Further examples of the Excel Networkdays function can be found on the Microsoft Office website.
If you get an error from the Excel Networkdays function this is likely to be one of the following :
|#VALUE!||-||Occurs if any of the supplied arguments are not valid dates|
Occurs when Analysis ToolPak add-in is not enabled in your Excel.