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# How to Count Cells that Contain Errors Read time: 29 minutes

We can Count Cells that Contain Errors in a range with a formula that combines the SUMPRODUCT and ISERROR functions. The steps below will walk through the process. Figure 1: How to Count Cells that Contain Errors

## General Formula:

`=SUMPRODUCT(ISERROR(range)*1)`

## Formula

`=SUMPRODUCT(ISERROR(B4:B11)*1)`

## Setting up the Data

• We will set up the data by inputting the DATA into Column B
• Cell C4 in Column C is where we want the formula to return the result for the number of cells with errors Figure 2: Setting up the Data

## Count Cells that Contain Errors

• We will click on Cell C4
• We will insert the formula below into the cell
`=SUMPRODUCT(ISERROR(B4:B11)*1)`
• We will press the enter key Figure 3: Count of Errors in Range B4:B11

## Explanation

The ISERROR function checks the range if they contain errors. The result is returned as an array of TRUE or FALSE.

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

TRUE represents the cells with errors and is converted to 1 so that the array looks like this:

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

The result of this array is then multiplied by 1 and the result is summed and returned as the result by the SUMPRODUCT Function.

## Note

We can use the SUM function instead of SUMPRODUCT function. However, we need to enter as an array formula using CTRL + SHIFT + ENTER. The formula is:

`=SUM(ISERROR(range)*1)`

ISERROR function counts all errors. If you use ISERR function, it will exclude #N/A

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