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## Coverage Calculation (Count / Count Distinct)

I am struggling to work out what I think should be some fairly straightforward DAX and can't find anything in the forum. Apologies if I have missed another post.

I have a client and product columns. What I am trying to achieve is to calculate what 'client coverage' each product has. Client coverage is defined by the percentage of clients that have a product and is between 0% and 100%. What is throwing a spanner in doing a COUNT(Products)/COUNT DISTINCT(Clients) is that some clients have some products more than once; the way I want my calculation to work is to be binary: A client has it or doesn't. I am not interested in how many times they have bought it.

Example data:

 Client Product A 1 A 2 A 3 B 1 B 1 B 2 C 1

In this instance, all clients have product 1, but Client B has it twice. Therefore coverage should be 100% not 133% if I did the formula above.

Expected caluculated output:

 Product Client Coverage 1 100% 2 67% 3 33%

Any help much appreciated. Thanks in advance.

Super User III

Here's a calculated column that you can use for that.

Coverage = DIVIDE(CALCULATE(DISTINCTCOUNT('Table'[Client]),ALLEXCEPT('Table','Table'[Product])),DISTINCTCOUNT('Table'[Client]))

Make sure to set its aggregation to "Don't summarize".

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