Ellie bought two packs of beads. Altogether she has 1,254 beads.
If the number of beads in each bag is the same, how many beads are in three packs?
Ellie has a total of 1,254 beads in two packs, so she has 1,254/2 = <<1254/2=627>>627 beads in each pack.
Therefore, three packs of beads will have 627 x 3 = <<627*3=1881>>1,881 beads. Answer: \boxed{1881}.