Uma Musume Inheritance Calculator
Optimize breeding chains and factor inheritance for maximum stat gains and skill sparks.
The Uma Musume Inheritance Calculator plans which parents and grandparents to use so your next trainee inherits the stat factors (blue sparks), aptitude factors (pink sparks) and skill sparks you want. It estimates inheritance odds and total stat bonuses so you can build a breeding chain that reliably passes down high stamina, the right distance aptitude and key skills.
Key Facts
- Plans blue (stat), pink (aptitude) and green (skill) factor inheritance
- Accounts for both parents and all four grandparents
- Higher star factors pass down bigger stat bonuses
- Concentrating the same factor across the chain raises spark odds
- Stamina factors are the highest-value picks for long-distance breeders
Breeding feels like a slot machine
Factor inheritance is random, and the game hides the odds. You pick two parents, hope for a triple-stamina spark, and usually get junk. Without knowing how grandparents and star levels stack, you waste your best legacies on chains that never pass the factors you actually need.
Stack the odds in your favour
This calculator shows how blue, pink and skill factors combine across both parents and all four grandparents, and estimates the chance of inheriting each spark at each star level. Plan a chain that concentrates stamina and your goal aptitude, and you turn breeding from a gamble into a repeatable stat engine.
How factor inheritance works
Every trainee can pass down factors earned in its career. Blue factors add flat stat bonuses, pink factors improve distance or surface aptitude, and green factors give a chance to start with a skill. The more copies of a factor across the parent and grandparent slots, the higher the odds it sparks on the child.
Building a stamina engine
For Long-distance trainees, prioritise 3-star stamina blue factors and the correct pink aptitude on every ancestor. The calculator shows the cumulative stamina bonus and the spark probability so you know when a chain is "good enough" to farm repeatedly.
Frequently Asked Questions
How do factor inheritance odds work?
Each factor on a parent or grandparent has a chance to spark on the child, scaled by its star level. Duplicating the same factor across the chain raises the combined odds. The calculator estimates these probabilities for you.
Are blue or pink factors more important?
Blue (stat) factors give the raw stamina/speed you need; pink (aptitude) factors fix a wrong distance or surface rating. For long-distance stamina builds you usually want both β high stamina blues plus the right distance pink.
Do grandparents matter?
Yes. All four grandparents contribute factors and their star levels, so a deep, focused chain out-performs two strong parents with weak grandparents.