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Breeding Line Builder
Live
Odds engine: ArkUtils (Apache-2.0), tested 1,148 cases
We estimate how many females a target-stat mutation line needs. Start with the breeding guide.
Line Setup
InputsGenetic targetMelee Damage
Preset label
Planning label
Desired mutation
ArkUtils model
Target-stat counter
Advanced probability overrides
Recommended Breeding Pool
ArkUtils baselineFemales required at selected confidence
335females
At baseline ASA mutation odds, 335 females gives the line about a 90% chance of producing the selected target-stat mutation in one breeding round.
90.0%Round confidence
Per-baby target chance
0.686%
After roll, stat, cap, higher-stat, and gender rules
Pool success chance
49.7%
Using your current pool of 100 females
Mutations remaining
20
Target-stat successes left to your goal
Rounds to one success
2
Approximate rounds until one target-stat success with this pool
Breeding line flow
Breeder
Rex MaleCarry the best current target stat forward.→
Female pool
335 females90% target confidence→
Desired roll
Melee DamageAccept the target-stat mutation and preferred gender.→
Promote
Next breederReplace the active breeder, then repeat the line.Repeat this loop for 20 successful target-stat mutations. The calculator estimates probability per round; it does not assume a fixed number of rounds to finish the full line.
What does my current pool do?Compare actual females to recommendation
Success this round49.7%
Failure this round50.3%
Expected one success~2 rounds
Mutation probability modelYour per-baby target chance compounds across the female pool to produce the selected confidence for each breeding round.
ConfidenceFemales required
50%101
75%202
90%335
95%436
99%670
99.9%1,005
ASA Trait Loadout
Father + MotherFather
Mother
Roll bonus+0%
Target weight+0
Higher pick+0%
This loadout exceeds an ArkUtils stack limit. Extra copies are ignored in the calculation.
Line Steps
20 remaining01
Anchor the clean female poolUse identical baseline females for the stat line and keep the target breeder isolated.
02
Breed Rex for Melee DamageRun approximately 335 females for a 90% confidence target.
03
Promote only the desired mutationKeep the target-stat mutation. Gender filtering follows the line settings above.
04
Repeat against the same clean poolContinue until the target-stat line reaches 20 mutations.
Saved Lines
0 savedSave this setup to keep the species, target stat, probability settings, traits, and confidence target together.
What this does not do
- Color mutations, creature levels, breeding cooldown, or twins.
- Live cluster rates. Odds use the ArkUtils 2.5% mutation model, tested on 1,148 cases.
- Cloud saves. Saved lines stay in this browser.