So I have an excel file over some years with 10min values [A2;A181441].

I want to SUM every row of 144 values into [C2;C1261].

Looking forward to your answers!

edit: Thanks @Rajesh S for update: Row of 144 values not every 144th value.

  • Did you mean to say that you want to Sum every 144 row in huge range? – Rajesh S Aug 10 at 10:23
  • Yes a row of 144, not 144th – Bfzn Aug 10 at 10:24
  • you mean bunch of 144 rows! – Rajesh S Aug 10 at 10:25
  • ,, do you have values in group like City of Region,, like Col A has City name (same city from 1 to 144) and Column B has number to SUM,, or better share some sample data with us. – Rajesh S Aug 10 at 10:40
  • Col A is Date in 10min: 09.07.2015 00:00, 09.07.2015 00:10, and so on. Col B is Energy in kWh. – Bfzn Aug 10 at 10:47

This will solve the issue:

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  • For better understanding in the shown example I've got the SUM of 5 rows (or bunch of 5 rows).
  • Formula in Cell E98:


  • Your Formula should be written like this.


  • If your data are in Range A1:B1000 along with headers in Row 1 then use this Formula in Cell D2.


Adjust cell references in the formula as needed.


Here is an alternative that uses Index() rather than Offset():


and copy downward.

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