Works: Calculating Number of Working Days Between Two Dates

This article was previously published under Q114946
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SUMMARY
You can calculate the number of workdays between two arbitrary datesby using the following formula in conjunction with the days left tableshown below
=Int((EndDay-StartDay)/7)*5+VlookUp(Mod((EndDay-StartDay),7),A3:H9, Choose(Mod(StartDay,7),1,2,3,4,5,6,7))
where StartDay is the starting date and EndDay is the ending date of the time span you are trying to find the number of working days for.

DAYS LEFT TABLE

The Days Left table uses cells A3:H9 as shown:
        A      B    C    D    E    F     G    H 1                  Day Started 2 Days Left  Sat  Sun  Mon  Tue  Wed  Thur  Fri 3      0      0    0    0    0    0     0    0 4      1      0    1    1    1    1     1    0 5      2      1    2    2    2    2     1    0 6      3      2    3    3    3    2     1    1 7      4      3    4    4    3    2     2    2 8      5      4    5    4    3    3     3    3 9      6      5    5    4    4    4     4    4				
MORE INFORMATION
The formula works because any seven days will always contain five workingdays, which is calculated by "Int((EndDay-StartDay)/7)*5". Then the DaysLeft table indicates how many working days are left over (after subtracting all the full seven-day weeks), depending on what day of the week the StartDay is.

NOTE: The Days Left table could have just as easily been based on the EndDay (then the EndDay would be used in the Choose function and the values in the table would be different).
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Article ID: 114946 - Last Review: 01/11/2015 15:24:45 - Revision: 4.0

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