Start with what you know
Enter two parents you already own, or choose the offspring you are trying to hatch.
Choose two parents to see what they make, or pick the Pal you want and work backward through every direct pair.
Most pairs are decided by averaging the parents' hidden breeding ranks. Special combos and same-Pal breeding are checked first because they follow their own rules.
Enter two parents you already own, or choose the offspring you are trying to hatch.
The calculator looks for a listed special combo before using the normal rank calculation.
The badge tells you whether the pair is a special combo, a same-Pal result or a rank calculation.
The full release added Pals and changed the breeding table, so an old spreadsheet can give you the wrong egg even when the pair used to work.
This build has 299 selectable Pals and 136 listed special combos. Astralym is recorded in the data, but it is not available as a parent because its breeding status is still unconfirmed.
You do not need to learn the whole formula to use the tool. Just check the badge beside the result when a pair matters to your route.
The two parents are listed as a specific 1.0 combination that overrides the normal rank rule.
The result comes from averaging both parent ranks and selecting the nearest eligible Pal.
Breeding a Pal with the same Pal returns that species.
Search for the Pal you want, compare the direct pairs, and start with parents you already have. A route that looks longer on paper can still save time if it avoids another capture.
Reusing a leveled or trait-ready parent is often faster than chasing the perfect theoretical pair.
A listed special pair beats the rank calculation, so do not skip the badge.
If the game updates, compare the patch date with the date shown at the top of the page.
Yes. It uses the 1.0.0 breeding data checked on July 13, 2026, including 299 breedable Pals and the Terraria crossover roster.
Verified results are special combos listed in the 1.0 data. Calculated results use the normal breeding-rank rule. The badge beside each result tells you which one you are looking at.
No. It tells you which species should hatch. Stats, passives and mutations are separate rolls and are not included in the result.
Their result depends on which parent is male and which is female. Choose the gender route shown in the calculator to switch between Katress Ignis and Wixen Noct.
No. Astralym is present in the 1.0 roster data, but its breeding status is still unconfirmed, so it stays out of the parent list for now.