Advanced Ark breeding statistics guide
Breeding in Ark is a numbers game. Each baby receives a stat level from one parent for every tracked stat. When parent levels differ, the stronger value is usually the target. This calculator turns those choices into practical odds. It helps you compare pairs before you spend eggs, food, time, and mutation room.
What the calculator estimates
The tool reads both parent stat levels. It marks the higher stat, the lower stat, and the expected baby value. It also estimates the chance of getting every selected keeper stat together. That combined chance is more useful than a single stat chance, because a breeder normally wants several strong traits in one baby.
Mutation planning
Mutation math is handled separately from inheritance. You can set maternal and paternal mutation chances, current counters, and the counter cap. When a side is capped, its mutation roll is ignored. The result shows expected mutation levels, the chance of any mutation, and the chance that a selected stat receives a mutation. This is an estimate, not a promise.
Using target level checks
A target baby level can be added. The calculator uses the expected inherited stat levels and a normal approximation to estimate the chance of reaching that level. This is useful when you breed for a minimum publishable level, a boss line requirement, or a clean combined stat goal.
Reading the result
The keeper chance is the main planning number. A low value does not mean the pair is bad. It means you may need more eggs or narrower goals. The chance of at least one keeper shows how batch size changes the plan. Expected keepers gives a simple average across the selected batch.
Best practice
Enter post-tame or clean breeding levels, not temporary boosted values. Keep notes for each line. Use selected stats only for traits you truly need. Compare several pairs, export the report, and keep the pair with the best balance of odds, mutation room, and target level probability.
Clean stat warning
Do not mix leveled battle stats with breeding records. Domestic level ups can hide the real inherited level. Record fresh babies, use consistent sources, and update counters after each kept mutation in your log carefully.