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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

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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Comments (18)
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DM
DM
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Классная формула, но как сделать чтобы в столбец A и B можно было постоянно добавлять и не менять формулу ? закрепить не диапазон а столбцы
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skyyang
skyyang     DM
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Hello, DM,
In fact, you can enlarg the cell references as you need. For example:
=SUMPRODUCT((($A$2:$A$10000=D2))/COUNTIFS($A$2:$A$10000,$A$2:$A$10000&"",$B$2:$B$10000,$B$2:$B$10000&""))
Please remeber to press Ctrl + Shift + Enter keys together.
Please have a try, hope it can help you!
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MB
MB
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Is there a way to do this but not count a blank cell as a value?
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skyyang
skyyang     MB
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Hello, MB
To count the unqiue values with criteria and skip the blank cell, you should apply the below array formula:
=SUM(--(FREQUENCY(IF($B$2:$B$15<>"",IF($A$2:$A$15=D2,MATCH($B$2:$B$15,$B$2:$B$15,0))),ROW($B$2:$B$15)-ROW(B2)+1)>0))


After pasting the fromula, please press Ctrl + Shift + Enter keys together.

https://www.extendoffice.com/images/stories/comments/comment-skyyang/doc-count-unique-criteria.png

Please try, hope it can help you!
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Rasheed
Rasheed
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Thank you very much for this but how does it work with a large data set. I realised it returns #N/A when the data is beyond row 78
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Ant
Ant
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I would need to do something similar but with dates: on a sheet in which the dates are indicated in the first column, many repeated, I would like to know how many different dates there are that meet a certain condition that appears in another column. I am applying that formula but it gives me an error. Could you help me? Thanks.
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Scottm
Scottm
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Does anyone know what the ampersand-quotes (" &"" ") in the Criteria 1 and 2 portion of the COUNTIFS formula is doing? This formula worked for me I was just hoping to understand it better.
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isaiah
isaiah
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Worked like a charm. Very much greatful to you.
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EB
EB
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OMG.... I have been searching for over a week for a formula that came close to helping me do a distinct count of one column based on another column.... YOURS FINALLY HELPED ;0) I am so happy!!!!!! Now I just need this formula that you posted to do the same thing but based on 2 column instead of one. I am going to try on my own but do you think you can help?
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skyyang
skyyang     EB
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Hello, EB, To count the unique values based on two columns, please apply the below formula, after entering the formula, please press Ctrl + Shift + Enter keys together to get the correct result.=SUM(IFERROR(($A$2:$A$15=E2)*($B$2:$B$15=F2)/COUNTIFS($C$2:$C$15,$C$2:$C$15,$A$2:$A$15,E2,$B$2:$B$15,F2),0))
Please try, hope it can help you!
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Kate
Kate     skyyang
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WOAH, you're a savior, thank you for sharing
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Why do you post some
Why do you post some
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Nevermind it did
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Why do you post some
Why do you post some
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Didn't work
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JZ
JZ
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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?
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