Counting the number of unique values

You can easily count the number of unique values of the range using a simple formula.

For example, you want to count the number of unique values of the range:

Data in Excel 2003

You can enter the next formula to the range D2:D12:

=SUM(1/COUNTIF($A$2:$A$12,$A$2:$A$12))

Summarize amount from a range D2:D12:

Data

This formula has a serious limitation: If the range contains any blank cells, it returns an error. The following formula solves this problem:

=SUM(IF(COUNTIF($A$2:$A$12,$A$2:$A$12)=0,"",1/COUNTIF($A$2:$A$12,$A$2:$A$12)))

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