Excel NETWORKDAYS.INTL Function

Related Function:
NETWORKDAYS
WORKDAY

Basic Description

The Excel Networkdays.Intl function calculates the number of whole work days between two supplied dates. This excludes all weekends and a supplied list of holidays. The function allows the user to specify which days are counted as weekends.

This function is new in Excel 2010 and so is not available in earlier versions of Excel. However, it is similar to the Networkdays function, which is available in earlier versions of Excel.

The syntax of the Networkdays.Intl function is:

NETWORKDAYS.INTL( start_date, end_date, [weekend], [holidays] )

Where the arguments are as follows:

start_date -

The start of the period for which we are counting days

(the start date is counted in the returned number of days)
end_date -

The end of the period for which we are counting days

(the end date is counted in the returned number of days)
[weekend] - An optional argument, which specifies which weekdays should be counted as weekends. This can be either a number or a string. These are explained below:

Possible number values for the [weekend] argument are:

[weekend] days counted
as weekend
1
(or omitted)
Sat & Sun
2 Sun & Mon
3 Mon & Tue
4 Tue & Wed
5 Wed & Thu
6 Thu & Fri
7 Fri & Sat
11 Sunday only
12 Monday only
13 Tuesday only
14 Wednesday only
15 Thursday only
16 Friday only
17 Saturday only

Possible string values for the [weekend] argument consist of a series of seven 0's and 1's which represent the seven weekdays, starting from Monday.

Each 1 denotes a day that should be counted as a weekend and each 0 represents a working day.

For example,

0000100 - denotes Fridays only counted as weekend days
0001100 - denotes Thursdays and Fridays counted as weekend days
0000111 - denotes Fridays, Saturdays and Sundays counted as weekend days
The string "1111111" is not valid.
[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 Microsoft advises that you do not type dates directly into functions, as Excel may interpret text representations of dates differently, depending on the date interpretation settings on your computer. Therefore the start_date, end_date and [holidays] arguments for the Networkdays.Intl function should be input as either:

    or

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.


Networkdays.Intl Function Examples

The spreadsheets below show simple examples of the Excel Networkdays.Intl 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.

 Formulas:
Examples of use of the Excel Networkdays.Intl Function
 Results:
Excel Networkdays.Intl Function Results

In the above spreadsheet :

Note also that, as recommended by Microsoft, in all three calls to the Networkdays.Intl function, the start_date, end_date, and [holidays] arguments have been supplied as cell references.


For further examples of the Excel Networkdays.Intl function, see the Microsoft Office website


Networkdays.Intl Function Errors

If you get an error from the Excel Networkdays.Intl function, this is likely to be one of the following:

Common Errors
#NUM! - Occurs if the supplied [weekend] argument is invalid (see above explanation of this argument).
#VALUE! - Occurs if the supplied start_date, end_date, or any of the values in the supplied [holidays] array are not valid dates.
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