There are two other methods to use the ISBLANK function. If you are using the formula and getting FALSE even when the cell is blank, the problem is that the cell contains a Zero-length String.

Formulas are powerful tools for performing calculations and analyzing data in Excel. In this beginner’s guide, you’ll learn how to use formulas and explore some popular built-in functions.

Writing Excel formulas isn't easy if you don't speak the language. Fortunately, at least two sites will translate your request, in English, into Excel code.