How to count days of week in the range of dates

Excel 365
From time to time, you need to count days of week in some date range or between two dates (see How to count days of week between two dates). Excel proposes different formulas to work with data. It is easy to create the formula you need for this task:

The formula WEEKDAY returns a number between 1 and 7 that corresponds to a particular day of the week. With default settings, 1 = Sunday, 2 = Monday, 3 = Tuesday, 4 = Wednesday, 5 = Thursday, 6 = Friday and 7 = Saturday.

To count days of week for the date range, for example, to count Fridays in the November holidays (range B2:B5), do one of the following:

To use the COUNTIF formula

   1.   Add new column (or row) for the range and insert the formula:

= WEEKDAY (<date>):

Day of week calculation in Excel 2016

   2.   Use the formula COUNTIF (<data range>, criteria) with the following parameters:

= COUNTIF (D2:D5, "=6"):

or

= COUNTIF (D2:D5, "="&F6):

COUNTIF formula in Excel 2016

To use the SUMPRODUCT formula

This formula is more complex, but doesn't need any additional calculation:

= SUMPRODUCT (-- (WEEKDAY (B2:B5) = 6))

or

= SUMPRODUCT (-- (WEEKDAY (B2:B5) = E7)):

SUMPRODUCT formula in Excel 2016

Whenever you put -- (two hyphens) in the front of the parenthesis, it changes all the values TRUE / FALSE in the array in the parenthesis to the values 1 / 0. So:

  • the formula (WEEKDAY (<date range>) = 6) returns the array of TRUE and FALSE,
  • (-- <array>) returns array of 1 and 0 instead of TRUE and FALSE,
  • SUMPRODUCT just sums all values of an array.

If you have any questions or suggestions, please feel free to ask OfficeToolTips team.

See Also

How to count days of week between two dates

How to count days of week between two dates

From time to time, you need to count days of week between two dates or in some date range (see How to count days of week in the range of dates). Excel proposes different formulas to work with data. It is easy to create the formula you need for this task:
How to calculate the number of work days for a four-day workweek

How to calculate the number of work days for a four-day workweek

When calculating the difference between two dates, you may want to exclude weekends and holidays. Excel proposes a standard formula for calculating the number of workdays for standard, five-day workweek. Also, Excel proposes a formula for calculating the number of workdays for different five-day workweek or six-day workweek.
Calculating the number of days between two dates

Calculating the number of days between two dates

If you need to count the number of dates between two dates in Excel, you don't need to use DATEDIF and other Excel date manipulation functions. Date in Excel isn't a separate type, but a number with proper formatting. The integer part of this number represents days since the fixed moment for all dates. Subtract one date from another, and you will get the number of days between two dates. Also, you can add or subtract an integer from the date, and get the date in the future or the past.