Thanks BerndP. That's pretty neat. I've seen other ways too. This list is
pretty comprehensive, I think:
< -- =SUMPRODUCT((A2:A105<"")/(COUNTIF(A2:A105,A2:A105&"")))
< -- =SUMPRODUCT((A2:A998<"")/(COUNTIF(A2:A998,A2:A998)+(A2:A998="")))
< --
=SUM(IF(FREQUENCY(IF(LEN(A2:A999)0,MATCH(A2:A999, A2:A999,0),""),IF(LEN(A2:A999)0,MATCH(A2:A999,A2: A999,0),""))0,1))
Note: This is a CSE Function
< -- =SUMPRODUCT((A2:A105<"")/COUNTIF(A2:A105,A2:A105&"")*(A2:A105<""))
< -- =SUMPRODUCT(--(A2:A999<""),1/COUNTIF(A2:A999,A2:A999&""))
< --
=SUM(--(FREQUENCY(IF(A2:A2705<"",MATCH(A2:A2705,A2:A2705 ,0)),ROW(INDIRECT("1:"&ROWS(A2:A2705))))0))
Note: This is a CSE Function
< -- =COUNT(1/FREQUENCY(A1:A400,A1:A400))
< -- =SUM(1/COUNTIF(C13:C17,C13:C17))
Note: This is a CSE Function & it fails if there are any blanks in between
< -- =SUM(IF(A2:A400<"",1/COUNTIF(A2:A400,A2:A400)))
< --
=SUM(IF(FREQUENCY(IF(A2:A1001<"",MATCH("~"&A2:A10 01,A2:A1001&"",0)),ROW(A2:A1001)-ROW(A2)+1),1))

I don't believe this list is exhaustive. There are probably many other ways
of doing this. Maybe some have yet to be discovered (by anyone).

HTH,
Ryan--

--
Ryan---
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"JBeaucaire" wrote:

This will check the whole column, but you can restrict it to just the range
you've noted if you want.

=SUM(IF(FREQUENCY(A:A,A:A)0,1))

--
"Actually, I *am* a rocket scientist." -- JB
(www.MadRocketScientist.com)

Your feedback is appreciated, click YES if this post helped you.


"Karen" wrote:

I have a range of cells (A5:A100). In some cells there are duplicate part
numbers. I want to count ONLY the unique values and not the duplicates. Does
anyone know how this can be done and what formula I would use to accomplish
this?
Thank you very much in advance, Karen