## Count number of date cells in a range by day of week

Excel provides the combination of SUMPRODUCT and WEEKDAY functions to help us easily count the number of specified weekdays within a range. This tutorial provides a step by step guide to help you get through it.

#### How to count date cells by day of week?

As the below screenshot shown, B3:B9 is the original data range where you want to count the dates, D3:D9 contains the sequential weekday names, and E3:E9 contains the sequential numbers from 1 to 7 to represent the weekday numbers. To count how many dates in B3:B9 equal to Monday, Tuesday, Wednesday and so on, you can do as follows.

Generic Formula

=SUMPRODUCT(--(WEEKDAY(dates)=day_num))

Arguments

Dates (required): The range contains the dates we want to count.

Day_num (required): The weekday number we will count based on.

How to use this formula?

1. Select a blank cell to output the result.

2. Enter the below formula into it and press the Enter key. Select the result cell, and then drag its AutoFill Handle down to other cells in current column to apply the formula.

=SUMPRODUCT(--(WEEKDAY(\$B\$3:\$B\$9,2)=E3))

Note: If there are blank cells in the original range, you will get incorrect results. To exclude blank cells, please apply the below formula:

=SUMPRODUCT((WEEKDAY(\$B\$3:\$B\$9,2)=E3)*(\$B\$3:\$B\$9<>""))

How this formula works?

=SUMPRODUCT(--(WEEKDAY(\$B\$3:\$B\$9,2)=E3))

• WEEKDAY(\$B\$3:\$B\$9,2): The WEEKDAY function returns an integer number from 1 to 7 to represent the day of week from B3:B9. Here the result is {5;3;1;2;2;4;1}.
• {5;3;1;2;2;4;1}=E3: {5;3;1;2;2;4;1}=1 Here check if each number in the array equals to 1, and return an array of TURE/FALSE values as {FALSE;FALSE;TRUE;FALSE;FALSE;FALSE;TRUE}.
• --({FALSE;FALSE;TRUE;FALSE;FALSE;FALSE;TRUE}): These two minus signs convert “TRUE” into 1 and convert “FALSE” into 0. Here you will get a new array as {0;0;1;0;0;0;1}.
• SUMPRODUCT{0;0;1;0;0;0;1}: The SUMPRODUCT function sums all number in the array and returns the final result as 2.

#### Related functions

Excel SUMPRODUCT function
The Excel SUMPRODUCT function can be used to multiply two or more columns or arrays together, and then get the sum of products.

Excel WEEKDAY function
The Excel WEEKDAY function returns an integer number from 1 to 7 to represent the day of the week for a given date in Excel.

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