Assume the values are in A1:A10

=SUMPRODUCT(--(A1:A10<""),1/COUNTIF(A1:A10,A1:A10&""))

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Regards,


Peo Sjoblom


"orquidea" wrote in message
...
HI

I have a list of series like this

serie 165125
serie 165126
serie 165127
serie 165125
serie 165126
serie 165124
serie 165125

I want to count how many series I have. The formula have to consider that
some series are repeiting in many rows. ei in the list above will be 4
series.

Could anyone help me please.

Thanks,
Orquidea