Fuse or Keep Calculator: Is Fusing 3 Pets Worth It? - Steal An Egg

Should I fuse this stack?

Open the Fuse Machine, select the pet, and read the result’s $/s from the preview. Enter it here with how many copies you own and what one copy earns.

What is the formula?

fuses possible  = floor(plain copies ÷ 3)
slots freed     = fuses × 2
income before   = one copy $/s × copies owned
income after    = fused $/s × fuses + one copy $/s × leftover copies

Only plain copies count toward a fuse; mutated ones are held back. The verdict compares before and after, and also shows income per slot, which is what matters when your Pen is full. How the machine itself works is in the fuse machine guide.

When does “keep” win?

Two cases:

1. You have empty slots. Three copies equipped beat one fused pet if the fused income is below 3× a single copy. The “income after” number shows this directly.
2. The result would sit on the bench. If the fused pet still does not clear your weakest equipped pet, fusing only helps if you needed the free slots. Check the cut line in the Pen slot optimizer.

What about the pet index?

Fusing consumes the inputs. Make sure at least one copy of any limited-time pet has been recorded before you feed the stack in — index rewards are free, and event pets do not return. Base values for comparison are on the all pets list.