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.

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.

Creating a list of duplicate values that’s separate from the data source is easier than ever thanks to Microsoft Excel's FILTER() function.