How do I get a sum of every seventh cell in a column?

J

Jubilado

Hello I am trying to find out how to get a sum of cells with a specific fixed
interval between them
 
B

Bernard Liengme

This will sum every seventh value in column A
=SUMPRODUCT(--(MOD(ROW(A1:A100),7)=1),A1:A100)
best wishes
 
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