Excel ISNUMBER Function

Excel ISNUMBER Function


The Excel ISNUMBER function returns TRUE when a cell contains a number, and FALSE if not. 


Test for numeric value

Return value 

A logical value (TRUE or FALSE)


=ISNUMBER (value)


  • value – The value to check.

Usage notes 

Use the ISNUMBER function to check if a value is a number. ISNA will return TRUE when value is numeric and FALSE when not.

For example, =ISNUMBER(A1) will return TRUE if A1 contains a number or a formula that returns a numeric value. If A1 contains text, ISNUMBER will return FALSE.

Normally, value is supplied as a cell address.

ISNUMBER is part of a group of functions called the IS functions.

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