I would use another cell in the same row that mimics the format|Conditional
formatting rules.

Then use count that column.
....maybe =countif(a2:a999,"red")

If you really, really have your heart set on using the conditional formatting,
take a look at Chip Pearson's site for some tips:
http://www.cpearson.com/excel/CFColors.htm

ExcelUser wrote:

The worksheet contains "conditionally formatted" cells.

The "conditions" are different for different cells

Cells "that need attention" are formatted with a red background

I want to count the number of cells with red backgrounds in the worksheet

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Dave Peterson