Adding Every Other Cell in a Column

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Today’s author is Bill Jelen, author of 24 books on Microsoft Office Excel. He is a regular guest on TechTV with Leo Laporte and the host of, which includes more than 300,000 questions and answers about Excel.

Jenny asks “Is there a quick way of adding every other cell ?, I have a column of about 250 cells, and I have to select them manually using Ctrl. Can you help ?”

Jenny, this is a matter of using a little math to remember how to determine if a number is even or is odd, and then translate that into the formula.

The formula
would return 0 if the number is even and 1 if odd. If we use instead of A1, the ROW() function, we can know if a particular row is even or odd. Now, suppose you’re trying to calculate this formula

=A1+A3+A5+A7+A9 … etc.
or this one


Remember, this is a CSE Formula, to enter it you must press at the same time Control Shift Enter, instead of just Enter as regular formulas.

You can also use this non-array formula


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