The Excel ISBLANK function is an Information formula that returns TRUE if the reference cell is completely empty, and FALSE otherwise. As the name suggests, the formula asks the "Is X blank?" question to its argument. Although a cell must be completely "blank" for the function to count it (i.e. " " will not be considered blank), this function can be especially useful in error handling, troubleshooting, and checking whether a cell contains any valid data. In this guide, we’re going to show you how to use the Excel ISBLANK function and also go over some tips and error handling methods.
- All Excel versions
Excel ISBLANK Function Syntax
|value||The value you want to test.|
The ISBLANK function, like the other IS… functions, requires a single argument for input. The argument can be a blank (empty) cell, a cell containing errors, logical values, strings, numbers, reference values, or a named range referring to any of these. However, any value other than a blank cell will return a FALSE outcome. This behavior makes the Excel ISBLANK function suitable for checking whether a cell contains any valid data.
- The Excel ISBLANK function, as the name suggests, follows an "is empty" logic. Note that a cell with a function that returns an empty string ("") is not considered a blank cell, and will not be counted by this function.
- You can use the ISBLANK function to test an IF =IF(ISBLANK(A1),"It is blank","It is filled")
- Below is a list of other IS… functions.