# How to Sum Numbers in A Month

The SUMPRODUCT function is to return the sum of the products of corresponding ranges or arrays. It can sum the numbers in a certain year, a month, or a day. The following example is to sum numbers in a month.

Example: You are working with a dataset with the product name in column A, the date sold in column B, and the amount sold in column C.

Formula 1: To count the total number of products sold in June

=SUMPRODUCT( –(MONTH(B2:B12)=6),C2:C12)

(MONTH(B2:B12)=6): if the month is June, it returns true, otherwise false;
The double hyphens (–) convert true into 1, and false into 0;
The SUMPRODUCT returns the sum of the products of the array.

The result returns 9,189, and 9,189 products were sold in June.

Formula 2: To count the total number of products sold in November

=SUMPRODUCT( –(MONTH(B2:B12)=11),C2:C12)

The result returns 2,834, and 2,834 products were sold in November.

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 then add.
– Array2 is optional, the second array is to multiply and then add.