Note: this formula is not case-sensitive, you can find a case-sensitive formula here. The COUNTIF then returns a count of any cells that do not contain “OK” which is compared to zero. If the count is zero, the formula returns TRUE. If the count is anything but zero, the formula returns FALSE.

Ignore empty cells

To ignore empty cells, you can use a more generic version of the formula: This formula generates a count of all matching values, and compares that count to a count of all non-empty cells.

Dave Bruns

Hi - I’m Dave Bruns, and I run Exceljet with my wife, Lisa. Our goal is to help you work faster in Excel. We create short videos, and clear examples of formulas, functions, pivot tables, conditional formatting, and charts.