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Sum every n rows or columns in a range in Excel

Author: Siluvia Last Modified: 2024-09-29

This tutorial explains two formulas based on the SUM and OFFSET functions to sum every n rows or columns in a specified range in Excel.

How to sum every n rows or columns in a given rang in Excel?

To sum every 3 rows in range E5:E14 as shown in the screenshot below, you can try the below formula.

doc-sum-every-n-rows-columns-1

Generic Formulas

=SUM(OFFSET(A1,(ROW()-offset)*n,0,n,1))

Arguments

A1: Represents the first cell of the range you will sum;
N: It is a number that represents every n rows.

How to use this formula?

1. Select a blank cell to output the first result.

2. Copy or enter the below formula into it and press the Enter key. Select the result cell, drag its AutoFill Handle down to get the other results.

=SUM(OFFSET($E$5,(ROW()-ROW($G$6))*3,0,3,1))

doc-sum-every-n-rows-columns-2

Notes:

1) In the formula, G6 is the cell where the formula sits.
2) To sum every n columns as shown on the screenshot below, please try this formula:

=SUM(OFFSET($C$6,,(COLUMNS($C$9:C9)-1)*3,,3))

doc-sum-every-n-rows-columns-3

Explanation of the formula

=SUM(OFFSET($E$5,(ROW()-ROW($G$6))*3,0,3,1))

OFFSET($E$5,(ROW()-ROW($G$6))*3,0,3,1): Here use the OFFSET function to return a range of reference from the starting row of the return range. OFFSET($E$5,0,0,3,1).
SUM(OFFSET($E$5,0,0,3,1)): The number 3 indicates 3 rows need to be summed starting from E5, then the SUM function sums values in E5:E7 and returns 5726.

Related functions

Excel SUM function
The Excel SUM function adds values.

Excel OFFSET function
The Excel OFFSET function returns a reference to a cell or a range of cells that is offset from a specific cell by a given number of rows and columns.

Excel ROW function
The Excel ROW function returns the row number of a reference.

Excel COLUMNS function
The Excel COLUMNS function returns the total number of columns in a given array or reference.

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