Summing every nth cell

S

S. Neese

Is there some way to tell Excel to sum (or whatever
calculation) every nth cell in a column?

I'd be most appreciative of any suggestions.
 
L

Leo Heuser

One way:

=SUMPRODUCT((B3:B20)*(MOD(ROW(B3:B20)-ROW(B3),N)=0))

Where N=2, 3, 4, ............
 
F

Frank Kabel

Hi
try the following (to sum every third cell in A1:A100)
=SUMPRODUCT(--(MOD(ROW(A1:A100)-1,3)=0),A1:A100)
 

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