Returns the number of whole working days between start_date and end_date. Working days exclude weekends and any dates identified in holidays. Use NETWORKDAYS to calculate employee benefits that accrue based on the number of days worked during a specific term.

If this function is not available, and returns the #NAME? error, install and load the Analysis ToolPak add-in.


  1. On the Tools menu, click Add-Ins.
  2. In the Add-Ins available list, select the Analysis ToolPak box, and then click OK.
  3. If necessary, follow the instructions in the setup program.



 Important   Dates should be entered by using the DATE function, or as results of other formulas or functions. For example, use DATE(2008,5,23) for the 23rd day of May, 2008. Problems can occur if dates are entered as text.

Start_date     is a date that represents the start date.

End_date     is a date that represents the end date.

Holidays     is an optional range of one or more dates to exclude from the working calendar, such as state and federal holidays and floating holidays. The list can be either a range of cells that contains the dates or an array constant (array: Used to build single formulas that produce multiple results or that operate on a group of arguments that are arranged in rows and columns. An array range shares a common formula; an array constant is a group of constants used as an argument.) of the serial numbers that represent the dates.


  • Microsoft Excel stores dates as sequential serial numbers so they can be used in calculations. By default, January 1, 1900 is serial number 1, and January 1, 2008 is serial number 39448 because it is 39,448 days after January 1, 1900. Microsoft Excel for the Macintosh uses a different date system as its default.
  • If any argument is not a valid date, NETWORKDAYS returns the #VALUE! error value.


The example may be easier to understand if you copy it to a blank worksheet.

ShowHow to copy an example

  1. Create a blank workbook or worksheet.
  2. Select the example in the Help topic.

 Note   Do not select the row or column headers.

Selecting an example from Help

Selecting an example from Help
  1. Press CTRL+C.
  2. In the worksheet, select cell A1, and press CTRL+V.
  3. To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.
Date Description
10/01/2008 Start date of project
3/01/2009 End date of project
11/26/2008 Holiday
12/4/2008 Holiday
1/21/2009 Holiday
Formula Description (Result)
=NETWORKDAYS(A2,A3) Number of workdays between the start and end date above (108)
=NETWORKDAYS(A2,A3,A4) Number of workdays between the start and end date above, excluding the first holiday (107)
=NETWORKDAYS(A2,A3,A4:A6) Number of workdays between the start and end date above, excluding every holiday above (105)

 Note   To convert the range of cells used for holidays in the last example into an array constant, select reference A4:A6 in the formula and then press F9.

Applies to:
Excel 2003