Excel ISNUMBER Function

This Excel Tutorial demonstrates how to use the Excel ISNUMBER Function in Excel to test if a cell is a number, with formula examples.

ISNUMBER Function Description:

The ISNUMBER Function Test if cell is a number. Returns TRUE or FALSE.

Formula Examples:

isnumber function examples

ExampleFormulaResult
Blank=ISNUMBER(C5)False
Text=ISNUMBER(C6)False
Number=ISNUMBER(C7)True
Error=ISNUMBER(C8)False

Syntax and Arguments:

The Syntax for the ISNUMBER Formula is:

Function Arguments ( Inputs ):

value – The test value

Additional Notes

Use the ISNUMBER Function to test if cell is a number. true/false

ISNUMBER Examples in VBA

You can also use the ISNUMBER function in VBA. Type:
application.worksheetfunction.isnumber(value)
For the function arguments (value, etc.), you can either enter them directly into the function, or define variables to use instead.

Return to the List of all Functions in Excel

How to use the ISNUMBER Function in Excel:

To use the AND Excel Worksheet Function, type the following into a cell:
=AND(
After entering it in the cell, notice how the AND formula inputs appear below the cell:
isnumber formula syntax
You will need to enter these inputs into the function. The function inputs are covered in more detail in the next section. However, if you ever need more help with the function, after typing “=ISNUMBER(” into a cell, without leaving the cell, use the shortcut CTRL + A (A for Arguments) to open the “Insert Function Dialog Box” for detailed instructions:
how to use the isnumber function in excel

For more information about the ISNUMBER Formula visit the
Microsoft Website.

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