## Compare two columns and highlight values in common

A conditional formatting formula highlights values in column B that also exist in column D.

The same thing happens in column D, a conditional formatting formula highlights values in common between column B and D.

### How to highlight common values

- Select cell range B3:B7
- Go to tab "Home" on the ribbon if you are not there already
- Click on Conditional Formatting button
- Click on "New Rule..."

- Click on "Use a formula to determine which cells to format"
- Type: = COUNTIF($D$3:$D$7, B3)

- Click on "Format..." button
- Click on "Fill" tab.
- Pick a color
- Click OK
- Click OK

Repeat above steps with column D, the formula is at the top of this article.

### Explaining conditional formatting formula

The COUNTIF function counts how many times value in cell B3 is found in cell range $D$3:$D$7. B3 changes to B4 when Excel moves on to next cell below, however, that is not the case with $D$3:$D$7.

The $ dollar signs make this cell reference locked, in other words, it doesn't change.

The Conditional Formatting in Excel interprets all numbers except 0 as TRUE so if the COUNTIF function finds a value twice and returns 2 doesn't matter, it still highlights the cell.

### Download excel *.xlsx file

Compare two columns and highlight matches.xlsx

*This blog article is one out of five articles on the same subject.*

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