Microsoft Excel is perhaps the most powerful spreadsheet application you can buy. But it also has some simple functions, like finding duplicates in data.

Prevent duplicates before they happen by combining a simple function with data validation.

Duplicates in the same column are easy to find by sorting, filtering, and using conditional formatting. When none of those are an option, try this simple formula solution.

In your sheet, click Extensions, then Remove Duplicates, and choose: Find Duplicates or Uniques. Follow the steps in the add-on wizard to choose the range and columns you'd like to check for ...

If you find yourself in a situation where you need to get a count of cells that contain one or more criteria, Excel includes both the COUNTIF and COUNTIFS functions for you to use.