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How to count unique values based on another column in Excel?

doc count unique by criteria 1

It may be common for us to count unique values in only one column, but, in this article, I will talk about how to count unique values based on another column. For example, I have the following two columns data, now, I need count the unique names in column B based on the content of column A to get the following result:

Count unique values based on another column with array formula


Advanced Combine Rows(Combine duplicate rows and count the corresponding values ):

With Kutools for Excel ’s Advanced Combine Rows utiltiy, you can quickly combine multiple duplicate rows into one record based on key columns, and it also can apply some calculations such as sum, average, count and so on for other columns.

1 . Specify the key column that you want to combine other column based on;

2 . Choose the separator or other calculations for your combined data.

doc advanced combine rows 1


arrow blue right bubble Count unique values based on another column with array formula


To solve this problem, the following formula can help you, please do as follows:

1. Enter this formula: =SUMPRODUCT((($A$2:$A$18=D2))/COUNTIFS($A$2:$A$18,$A$2:$A$18&"",$B$2:$B$18,$B$2:$B$18&"")) into a blank cell where you want to put the result, E2, for instance. And then press Ctrl + Shift + Enter keys together to get the correct result, see screenshot:

doc count unique by criteria 2

Note: In the above formula: A2:A18 is the column data that you count the unique values based on, B2:B18 is the column that you want to count the unique values, D2 contains the criteria that you count unique based on.

2. Then drag the fill handle down to get the unique values of the corresponding criteria. See screenshot:

doc count unique by criteria 3


Related articles:

How to count the number of unique values in a range in Excel?

How to count unique values in a filtered column in Excel?

How to count same or duplicate values only once in a column?


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  • To post as a guest, your comment is unpublished.
    JZ · 1 years ago
    This works great, but what if you need to add a 3rd column of criteria and what if some cells have blanks and you don't want to count the blanks?
  • To post as a guest, your comment is unpublished.
    . · 1 years ago
    did you try COUNTIFS?
  • To post as a guest, your comment is unpublished.
    Cara · 1 years ago
    Hi - this formula worked great for a discrete set of data. When I tried to use it with a dynamic range, it did not function properly. Any idea what's going wrong?
  • To post as a guest, your comment is unpublished.
    Manickam · 1 years ago
    That worked like a beauty
  • To post as a guest, your comment is unpublished.
    dude · 1 years ago
    I can't believe the array formula worked.