If you wish to count the same or duplicate values in a column only once in Excel or the count of occurances of duplicate values, read this article.

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.

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 ...

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.

Need to find cells with specific text? The COUNTIF formula in Excel has got you covered.