Count unique values in Excel

Question

I need to count unique values in range (C2:C2080) in excel. Googled formula:

=SUM(IF(FREQUENCY(MATCH(C2:C2080;C2:C2080;0);MATCH(C2:C280;C2:C2080;0))>0;1))         


        

Answer 1

After reading through this and then investigating further, I've got one that works better for me than anything I see here:

Array-enter:
(Ctrl+Shift+Enter, and don't include the curly brackets)

{=SUM(IFERROR(1/COUNTIF(C2:C2080,C2:C2080),0))}

Or in VBA:

MyResult = MyWorksheetObj.Evaluate("=SUM(IFERROR(1/COUNTIF(C2:C2080,C2:C2080),0))")

It works for both numbers and text, it handles blank cells, it handles errors in referenced cells, and it works in VBA. It's also one of the most compact solutions I've seen. Using it in VBA, it apparently automatically handles the need to be an array formula.

Note, the way it handles errors is by simply including them in the count of uniques. For example, if you have two cells returning #DIV/0! and three cells returning #VALUE!, those 5 cells would add 2 to the final count of unique values. If you want errors completely excluded, it would need to be modified for that.

In my tests, this one from Jacob above only works for numbers, not text, and does not handle errors in referenced cells (returns an error if any of the referenced cells returns an error):

=SUM(IF(FREQUENCY(G4:G29,G4:G29)>0,1))