One way:

Assume the first formula is entered in A4:

=SUM(OFFSET($A1,,(COLUMNS($A4:A4)-1)*3,,3))

However, if this is for just a single year which only has 4 quarters, what's
wrong with using 4 simple sum formulas:

=SUM(A1:C1)
=SUM(D1:F1)
=SUM(G1:I1)
=SUM(J1:L1)

Using those 4 formulas is better than using the formula I suggested.


--
Biff
Microsoft Excel MVP


"Steve" wrote in message
...
I am converting a monthly revenue table to a quarterly revenue table. I
would
like to add A1:C1 and put it the result in a new cell and then autofill
the
cell to the right of it so that it automatically adds D1:F1 for the next
value
A B C D E F
1 Jan Feb March April May June
2 10 12 12 13 14 15

Qtr1 Qtr 2 Qtr 3
sum A2:C2 Sum D2:F2 Etc... using autofill
currently using autofill the first qtr is correct "=Sum(A2:C2) but the
next
cell gets filled with "=sum(B2:D2) instead of adding the next 3 months.

I appreciate anyone's help!