Automatic numbering with letters

[rayybay]

I need to automatic number using letters instead of numbers, but after "Z" I
need the lettering to be AA, BB, CC, DD ... and should it go over ZZ, I need
it to be AAA, BBB, CCC, etc. Any help would be fantastic. Thanks!

 

[David Biddulph]

=REPT(CHAR(MOD(ROW()-1,26)+65),1+(ROW()-1)/26)

 

[rayybay]

This only allows me to start in cell A1, but with my title rows, I have it
starting in A7. Can the formula be modified to allow me to start with A in
A7 instead of G? Thanks!

 

[Rick Rothstein]

Give this modification to David's formula a try...

=REPT(CHAR(MOD(ROW(A1)-1,26)+65),1+(ROW(A1)-1)/26)

 

[David Biddulph]

Use ROW(A1) in the formula, instead of ROW()

 

[rayybay]

FANTASTIC!!!! Thank you both!!

Give this modification to David's formula a try...

=REPT(CHAR(MOD(ROW(A1)-1,26)+65),1+(ROW(A1)-1)/26)