You're welcome. Thanks for the feedback!

--
Biff
Microsoft Excel MVP


"gma" wrote in message
...
super...thanks!!!!

"T. Valko" wrote:

To sum every 3rd cell starting from cell C1: (C1,F1,I1,L1,etc.)

=SUMPRODUCT(--(MOD(COLUMN(C1:T1)-COLUMN(C1),3)=0),C1:T1)

To sum every 3rd cell starting from cell D1: (D1,G1,J1,M1,etc.)

=SUMPRODUCT(--(MOD(COLUMN(D1:T1)-COLUMN(D1),3)=0),D1:T1)

In each formula adjust for the correct end of range T1.

Caveat: inserting new columns *within* the referenced range will cause
the
formulas to calculate the incorrect cell interval.

--
Biff
Microsoft Excel MVP


"gma" wrote in message
...
leave it up to me to screw up the question....the formula you gave me
works
great but instead of me needing to add every other column, i need the
formula
to add every third column. how do i do that?

"FSt1" wrote:

hi
you are wanting to sum everyother column ie even numberd column and
odd
numbered columns. your columns may have letters but excel can display
them as
numbered columns. A,C,E,G etc are odd. B,D,F,H are even.
toolsoptionsgeneral tabcheck R1C1 reference style to see what i
mean.
to sum odd columns, in A1 use this fomula.....
=SUMPRODUCT((MOD(COLUMN(C1:M1),2)=1)*(C1:M1))
adjust ranges to suit your data.
to sum even columns, in B1 use this formula.....
=SUMPRODUCT((MOD(COLUMN(D1:M1),2)=0)*(D1:M1))

regards
FSt1

"gma" wrote:

i need a formula in cell A1 to total cell C1 and everyother column
after that
i.e. E1,G1 ect
i need a formula in cell B1 to total cell D1 and everyother column
after
that i.e. F1,H1 ect
how do i do that?


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