To count the number of cells in the current month, you can use the COUNTIFS or SUMPRODUCT functions.
Example: You are working with a worksheet with the first name in column A, the last name in column B, and the date of appointment in column C.
Question: How many people have appointments in the current month?
=COUNTIFS(C2:C12, ">=" & (EOMONTH(TODAY(),-1)+1), C2:C12, "<=" & (EOMONTH(TODAY(),0)))
The result returns 2, so there are two appointments in the current month if the current month is November 2022.
Explanation:
- Step 1: TODAY(): To have today's date;
- Step 2: (EOMONTH(TODAY(),-1)+1): The result returns the first day of the current month;
- Step 3: (EOMONTH(TODAY(),0)): The result returns the last day of the current month;
Alternatively, you can use the SUMPRODUCT function to have the same results.
=SUMPRODUCT(–(C2:C12 >= (EOMONTH(TODAY(),-1)+1)), –(C2:C12 <= (EOMONTH(TODAY(),0))))
=SUMPRODUCT((C2:C12 >= (EOMONTH(TODAY(),-1)+1))*1, (C2:C12 <= (EOMONTH(TODAY(),0)))*1)
Explanation:
- Step 1: TODAY(): To have today's date;
- Step 2: (EOMONTH(TODAY(),-1)+1): The result returns the first day of the current month;
- Step 3: (EOMONTH(TODAY(),0)): The result returns the last day of the current month;
- Step 5: (C2:C12 >= (EOMONTH(TODAY(),-1)+1)): The result returns TRUE if a date is after the first day of the current month;
- Step 6: (C2:C12 <= (EOMONTH(TODAY(),0))): The result returns TRUE if the date is before the last of the current month;
- Step 7: The hyphen (or times one) converts TRUE into one and FALSE into zero;
- Step 8: The SUMPRODUCT function returns the sum of the products of the new array.
Notes: The SUMPRODUCT function
The SUMPRODUCT function adds all the multiplication results for all arrays.
Formula:
=SUMPRODUCT(array1, [array2], …)
Explanations:
– Array1 is required; the first array is to multiply and add.
– Array2 is optional; the second array is to multiply and add.