This article describes the formula syntax and usage of the NETWORKDAYS function (function: A prewritten formula that takes a value or values, performs an operation, and returns a value or values. Use functions to simplify and shorten formulas on a worksheet, especially those that perform lengthy or complex calculations.) in Microsoft Excel.
Description
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.
Tip To calculate whole workdays between two dates by using parameters to indicate which and how many days are weekend days, use the NETWORKDAYS.INTL function.
Syntax
NETWORKDAYS(start_date, end_date, [holidays])
The NETWORKDAYS function syntax has the following arguments (argument: A value that provides information to an action, an event, a method, a property, a function, or a procedure.):
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.
Remarks
 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.
 If any argument is not a valid date, NETWORKDAYS returns the #VALUE! error value.
Example
The example may be easier to understand if you copy it to a blank worksheet.
How do I copy an example?
 Select the example in this article. If you are copying the example in Excel Online, copy and paste one cell at a time.
Important: Do not select the row or column headers.
Selecting an example from Help
 Press CTRL+C.
 Create a blank workbook or worksheet.
 In the worksheet, select cell A1, and press CTRL+V. If you are working in Excel Online, repeat copying and pasting for each cell in the example.
Important: For the example to work properly, you must paste it into cell A1 of the worksheet.
 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.
After you copy the example to a blank worksheet, you can adapt it to suit your needs.

A 
B 
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) 

Notes
 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.
 In Excel Online, to view the result in its proper format, select the cell, and then on the Home tab, in the Number group, click the arrow next to Number Format, and click General.