A breeding companion, not a wiki dump.

Hatchlog started as a single question: why does every Palworld breeding tool make you re-derive the same math by hand? Most calculators give you an answer with no explanation attached — you get a species name and have to trust it. Hatchlog shows its work: the exact target rank, whether a fixed combo overrode the formula, and a path back to parents you can actually go catch.

What Hatchlog is

• A free breeding calculator covering the standard rank-averaging formula, fixed elemental combos, and same-species pairs.
• A mutation odds reference so you know what a cake is actually buying you before you use it.
• A breeding tree and path finder for planning multi-generation projects instead of guessing one pairing at a time.
• A searchable database of every tracked pal's breeding rank, kept in one place so every tool on the site agrees with itself.

Where the data comes from

Breeding ranks, fixed combos, and mutation mechanics are compiled from community documentation and cross-referenced across multiple sources. This is not official Pocketpair data — the developers haven't published exact breeding values — so treat every number here as a well-tested community approximation rather than gospel. Ranks can drift after balance patches; if something looks off, it probably means the game changed since this page was last updated, not that the formula is wrong.

What Hatchlog isn't

It isn't affiliated with, endorsed by, or connected to Pocketpair, Inc. in any way. Palworld and all pal names referenced on this site are trademarks of their respective owner. Hatchlog is unofficial fan software, built by players, for players.

Get in touch

Spotted a rank that looks wrong, or a fixed combo that's changed since a patch? This page is a good place to note that you'd normally list a contact method here — swap in your real support email or feedback form before you publish.