Where A2 is the top-most cell of the selected range.
In the Format values where this formula is true box, enter a formula similar to this:. On the Home tab, in the Styles group, click Conditional Formatting > New rule > Use a formula to determine which cells to format. To highlight 2 nd and all subsequent duplicate occurrences, select the cells you want to color, and create a formula-based rule in this way: How to highlight duplicates without 1 st occurrences To highlight all duplicates except first instances, create a conditional formatting rule based on formula as explained in the next example. It shades duplicate cells including their first occurrences. To highlight duplicate rows, you would need to create your own rules either based on values in a specific column or by comparing values in several columns. When using Excel's inbuilt rule for highlighting duplicate values, please keep in mind the following two things: If you want to find and highlight matches and differences between 2 columns, follow the examples in the above linked tutorial. When applying the built-in duplicate rule to two or more columns, Excel does not compare the values in those columns, it simply highlights all duplicate instances in the range. Duplicate Remover - the fastest way to find and highlight dupes in Excel. Shade entire rows based on duplicate values in one column. Highlight N th and subsequent duplicate records. Highlight duplicates in a range (multiple columns). Highlight duplicates except 1 st instances. These techniques work in all versions of Excel 365, Excel 2021, Excel 2019, Excel 2016, Excel 2013, Excel 2010 and lower. 
The biggest advantage of this method is that it not only shows dupes in the existing data but automatically checks new data for duplicates right when you enter it in a worksheet. The fastest way to find and highlight duplicates in Excel is using conditional formatting. Undoubtedly, those solutions are very useful, but highlighting duplicate entries in a certain color could make data analysis even easier. Last week, we explored different ways to identify duplicates in Excel with formulas. We are going to have a close look at how to shade duplicate cells, entire rows, or consecutive dupes using conditional formatting and a special tool.
In this tutorial, you will learn how to automatically highlight duplicates in Excel once something has been typed.
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