Excel ISNA Function

Excel ISNA Function


The Excel ISNA function returns TRUE when a cell contains the #N/A error and FALSE for any other value, or any other error type.


Test for the #N/A error

Return value 

A logical value (TRUE or FALSE)


=ISNA (value)


  • value – The value to check if #N/A.

Usage notes 

Use the ISNA function to check if a value is #N/A. ISNA will return TRUE when value is #N/A

For example, =ISNA(A1) will return TRUE if A1 contains #N/A.

Normally, value is supplied as a cell address.

ISNA is part of a group of functions called the “IS functions”, which are often used to test the result of formulas for errors.

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