How to display data in a bar chart rounded to thousands in Microsoft Excel:

1. Select the data range that you want to use for your bar chart.
2. Click on the Insert tab in the top menu bar and select Bar from the Charts section.
3. Choose the type of bar chart you want to create. For example, you can choose a clustered bar chart or a stacked bar chart.
4. Once you have created your chart, right-click on any of the bars in the chart and select Format Data Series from the drop-down menu.
5. In the Format Data Series pane that appears on the right-hand side of the screen, click on the Number tab.
6. Under Category, select Custom.
7. In the Type field, enter the following format code:
   Formula:

   #,###;(#,###) 

8. Click Add and then OK to close the Format Data Series pane.

Your bar chart will now display data rounded to the nearest thousand. If you want to change the rounding to a different value, simply modify the format code in step 7 to reflect the desired rounding.