Summing numbers that are equally spaced apart

Danny318

New Member
Joined
Jun 19, 2007
Messages
44
I'm trying to sum up the "subtotals" for a set of numbers that occur at the same intervals but I don't want to say Sum(x1 + x2 +x3...). I thought their was a way to select one cell and do some kind of control alt something to have excel highlight all the cells that were equally spaced apart from one another. It's a huge spreadsheet and I'd rather not get carpel tunnel. Thanks!
 

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What's the range of cells and how equally spaced apart are they?
 
Upvote 0
Are you trying to get a total sum for a column of numbers that includes rows that have sub-totals?

If so, and all the numbers are included in the sub-totals:-

=SUM(A1:A100)/2
 
Upvote 0
Not sure how your data are set up exactly but this will sum the values in A31, A62, A93 etc. Entered as an array formula, ctrl+shift+enter

=SUM(IF((MOD(ROW(A1:A100),31)=0),A1:A100))
 
Upvote 0
Perhaps:

=SUMPRODUCT(--(MOD(ROW(A31:A100)-ROW(A31),31)=0),A31:A100)
 
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