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.

If your spreadsheet has a lot of unwanted duplicate values, you're not stuck with them. You can remove them. We'll show you how to remove duplicates in Excel.

Duplicates aren't bad, but you may need to know how many times a value is repeated or how many unique values are in a data range. Here's how to tackle these tasks in Excel.

How can we find duplicate values across multiple columns? For this task, we’ll use two Excel helper formulas: One to concatenate the columns you’re comparing; a second to count the duplicates.