How to Sum Either Odd or Even Rows Only

   A1: 1
   A2: 1
   A3: 1
   A4: =SUM(A1:A3)
				

MORE INFORMATION

If you would like to sum only the Odd or the Even rows in a range, instead of trying to hide rows, which does not work in this case, you can use the following formulas.

Odd Rows

   =SUM(IF(MOD(ROW(A1:A3),2)=1,A1:A3,0))
				

If you enter this as an array formula in cell A4 in the above example, it returns a value of 2.

NOTE: To enter a formula as an array formula in Microsoft Excel for Windows, press CTRL+SHIFT+ENTER. In Microsoft Excel for the Macintosh, press COMMAND+RETURN.

Even Rows

   =SUM(IF(MOD(ROW(A1:A3),2)=0,A1:A3,0))
				

If you enter this as an array formula in cell A4 in the above example, it returns a value of 1.

NOTE: If you still want to hide rows for the above example, the two functions given will still work as outlined.