# Compare Two Lists

This example describes how to **compare two lists** using conditional formatting. For example, you may have two lists of NFL teams.

To highlight the teams in the **first list** that are not in the **second list**, execute the following steps.

1. First, select the range A1:A18 and name it firstList, select the range B1:B20 and name it secondList.

2. Next, select the range A1:A18.

3. On the Home tab, in the Styles group, click Conditional Formatting.

4. Click New Rule.

5. Select 'Use a formula to determine which cells to format'.

6. Enter the formula =COUNTIF(secondList,A1)=0

7. Select a formatting style and click OK.

Result. Miami Dolphins and Tennessee Titans are not in the second list.

Explanation: =COUNTIF(secondList,A1) counts the number of teams in secondList that are equal to the team in cell A1. If COUNTIF(secondList,A1) = 0, the team in cell A1 is not in the second list. As a result, **Excel** fills the cell with a blue background color. Always write the formula for the upper-left cell in the selected range (A1:A18). Excel automatically copies the formula to the other cells. Thus, cell A2 contains the formula =COUNTIF(secondList,A2)=0, cell A3 =COUNTIF(secondList,A3)=0, etc.

8. To highlight the teams in the second list that are not in the first list, select the range B1:B20, create a new rule using the formula =COUNTIF(firstList,B1)=0, and set the format to orange fill.

Result. Denver Broncos, Arizona Cardinals, Minnesota Vikings and Pittsburgh Steelers are not in the first list.