ISBLANK function

Excel ISBLANK Function checks if a cell is empty or blank. It returns TRUE if the cell is empty and FALSE if it contains any data. This function is useful for various tasks like data validation and conditional formatting.




valueThe cell or range of cells you want to check for emptiness.

How to use

You can use the ISBLANK function in Excel to check whether a cell is empty. Here are some examples:

This formula checks if cell A1 is empty. It will return TRUE if A1 is empty and FALSE if it contains any data.

Here, we check if all cells in the range B2 to B5 are empty. The formula will return TRUE only if all the cells are blank; otherwise, it will return FALSE.

This example uses the ISBLANK function within an IF function to provide a custom message based on whether cell C3 is empty or not.


Let’s look at some practical examples of using the ISBLANK function:


In the first example, ISBLANK(A1) returns FALSE because cell A1 contains the number 42. In the second example, ISBLANK(A2) returns TRUE because cell A2 is empty.

Additional Information

If you want to check if a cell contains a specific type of data (e.g., text, numbers, errors), you can use other Excel functions like ISTEXT, ISNUMBER, or ISERROR in combination with ISBLANK.

Tomasz Decker is an Excel specialist, skilled in data analysis and financial modeling.