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Thread: Sum 3 columns at a time

  1. #1
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    Sum 3 columns at a time

    I have monthly amounts that I want to show in another spreadsheet as quarterly totals. I sum the Jan-Mar numbers (or A1-C1) into a cell in another tab to get a Quarter 1 (Q1) total. Then I click->drag the (Q1) total cell to the next one, hoping I'll get the Apr-Jun (or D1-F1) total, but it adds the Feb-Apr (or B1-D1) cell. How do I make the next cell know that it has to add the next 3 columns?

  2. #2
    Forum Guru NBVC's Avatar
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    Re: Sum 3 columns at a time

    Try:

    =SUM(INDEX(Sheet1!$A$1:$L$1,1+((COLUMN(A1)-1)*3)):INDEX(Sheet1!$A$1:$L$1,3+((COLUMN(A1)-1)*3)))
    adjust sheetnames, ranges to suit and copy across
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