# Count cells that contain odd numbers with SUMPRODUCT

February 28, 2022

In this article, I'll explain how to count cells that contain odd numbers in Excel. This example uses two functions: SUMPRODUCT and MOD.

## The syntax

If you are familiar with SUMPRODUCT, then the syntax for this formula really simple:

`=SUMPRODUCT(--(MOD(range, 2)=1))`

where range is the range of numbers to check against your criteria

## How MOD function works

MOD function returns the remainder after a number has been divided and takes two parameters: number and divisor.

By definition, an odd number is one that, after being divided by 2, returns a remainder of 1. So, for MOD, we will supply the range of cells where we want to count all odd values as the `number` parameter and 2 for the `divisor`.

## Step by step SUMPRODUCT formula

In the exercise file, I have prepared a range of 7 numbers which are stored in cells D3:D9. The formula I've used is shown below:

`=SUMPRODUCT(--(MOD(D3:D9, 2)=1))`

To write the formula pick any blank cell and:

1. Type =SUMPRODUCT(
2. Followed by -- to coerce the TRUE/FALSE values to numbers.
3. Open a parenthesis that will hold your criterion.
4. Then type MOD(
5. Select or type the range to be used as your `number` parameter, followed by a comma. In my example, it's `D3:D9`.
6. Insert 2 as the divisor, and ) to close the MOD function.
7. Then, type =1 to make sure your formula is checking for odd numbers.
8. Finally, type )) and then press Enter to complete the SUMPRODUCT formula.

The formula will return 4, because there are 4 odd numbers in the range D3:D9.

Remember that this formula will not work if you don't coerce the TRUE/FALSE values to numbers using the double negative.

## The formula explained

The nice part about this formula is that the SUMPRODUCT function works directly with arrays. This means you don't need to combine multiple functions and convert your formula to an array using the CTRL + SHIFT + ENTER keyboard combination.

It also means that you can perform a test directly on an array using one or more criteria and count the results.

Since we are looking to count all the odd numbers from our range, we create a condition using the MOD function:

`MOD(D3:D9, 2)=1`

Because our divisor is 2, MOD will return either a remainder of 1 (for odd numbers) or a remainder of zero (for even numbers).

Then, SUMPRODUCT will run the test against each of the 7 values from cells D3:D9 and return an array of TRUE and FALSE values:

`{FALSE, TRUE, FALSE, FALSE, TRUE, TRUE, TRUE}`

After all the TRUE/FALSE values are coerced (using the -- double negative), we have:

`{0, 1, 0, 0, 1, 1, 1}`

In the final step, SUMPRODUCT will sum all the values from the coerced array and return 4.

## What to do next?

If you are looking to improve your Excel counting skills, I recommend that you also read the following articles about how to: My name is Radu Meghes, and I'm the owner of excelexplained.com. Over the past 15+ years, I have been using Microsoft Excel in my day-to-day job. I’ve worked as an investment and business analyst, and Excel has always been my most powerful weapon. Its flexibility and complexity make it a highly demanded skill for finance employees. I launched excelexplained.com back in 2017, and it has become a trusted source for Excel tutorials for hundreds of thousands of people each year.

If you'd like to get in touch, you can contact me on LinkedIn.

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