Need to add every third value in a row of data

B

baurian

Hi,

I need to add every third value in a row of data and I do not know how.

Thank you,

Benedict
 
P

Pete_UK

Try this:

=SUMPRODUCT(--(MOD(ROW(A1:A100),3)=0),A1:A100)

Assumes you are trying to add from column A - adjust to suit. It will
add rows 3, 6, 9, 12 etc.

Hope this helps.

Pete
 
P

Pete_UK

Just noticed you said the data is in a row. Change the formula to
this:

=SUMPRODUCT(--(MOD(COLUMN(A2:AA2),3)=0),A2:AA2)

This looks at row 2 and adds every third column from C onwards.

Hope this helps.

Pete
 
B

baurian

Thank you, Pete. It works with numbers; it does not seem to work with (date
time) in the cell.

Benedict
 
P

Peo Sjoblom

If they are Excel data/times they are numbers, maybe you only need to format
it the right way like [h]:mm etc or
maybe they are text but look like numerical dates times?

--


Regards,


Peo Sjoblom
 
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