Uma Musume Legacy Calculator
Optimize your parent selection and maximize inheritance probability
63
Estimated total attribute points gained from two inheritance events.
1.20x
14.5
126
Inheritance Efficiency Projection
Chart visualizing relative contribution of each generation to the legacy score.
What is Uma Musume Legacy Calculator?
The uma musume legacy calculator is an essential tool for trainers looking to optimize their horse girls’ performance through the inheritance system. In the game Uma Musume Pretty Derby, inheritance (also known as the “Legacy” or “Factor” system) occurs at the start of training and during specific milestones in April of the second and third years. This system passes down attributes, surface aptitudes, and unique skills from the pedigree line.
Many trainers mistakenly believe that inheritance is purely random. However, using a uma musume legacy calculator reveals that factors such as compatibility (◎ vs ○) and the star ratings of factors significantly influence the expected outcome. Our calculator helps you quantify these variables to ensure you aren’t wasting energy on sub-optimal parent pairings.
Uma Musume Legacy Calculator Formula and Mathematical Explanation
The core logic behind the uma musume legacy calculator relies on the base stats provided by stars. In general, 1-star factors provide a small boost, 2-star factors a medium boost, and 3-star factors the maximum boost. The formula for expected stat gain used by the uma musume legacy calculator is as follows:
Total Expected Gain = (Σ Stars × Star Multiplier) × Compatibility Bonus × Inheritance Events
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Compatibility | Affinity between girl and parents | Multiplier | 0.5 – 1.5 |
| Blue Factor Stars | Attribute stars (Speed, Stamina, etc) | Stars (★) | 1 – 3 per slot |
| Inheritance Events | Fixed trigger points in April | Count | 2 Events |
| Star Value | Base stat increase per star | Points | ~7 pts per star |
Practical Examples (Real-World Use Cases)
Example 1: High Compatibility Build
A trainer selects two parents with “Great” (◎) compatibility. The total blue stars for Speed across the pedigree is 18★. Using the uma musume legacy calculator, we determine that the expected Speed gain over two years would be approximately 126 points, assuming all factors trigger successfully.
Example 2: Budget Parent Pairing
A trainer uses parents with “Average” (△) compatibility and only 9 total stars. The uma musume legacy calculator shows a significantly lower expected gain of 45 points. This illustrates why focusing on 3-star factor parents is critical for competitive PVP builds.
How to Use This Uma Musume Legacy Calculator
- Select Compatibility: Check the inheritance screen in-game and choose the icon that matches your current setup (◎, ○, △, or X).
- Enter Parent Stars: Count the blue stars of your two main parents and enter the total.
- Enter Grandparent Stars: Count the blue stars of the four grandparents in the pedigree.
- Choose Focus: Select which specific stat you are calculating for (Speed, Power, etc.).
- Analyze Results: Use the “Expected Total Stat Gain” to decide if the pairing is worth the training energy.
Key Factors That Affect Uma Musume Legacy Calculator Results
- Inheritance Compatibility: This is the single most important multiplier in the uma musume legacy calculator. Higher compatibility increases the probability that factors will trigger.
- Blue Factor Density: 3-star factors offer nearly double the value of 2-star factors. Always aim for 9-star parents.
- Race History (G1 Wins): Winning the same G1 races across different generations in the pedigree increases compatibility scores hidden in the uma musume legacy calculator logic.
- Relationship Tags: Certain girls have naturally higher compatibility with others based on their real-life historical relationships.
- RNG Variance: While the uma musume legacy calculator provides expectations, the actual inheritance is subject to random chance.
- Aptitude (Pink Factors): These don’t provide stat points but are calculated similarly for passing down surface and distance rankings.
Frequently Asked Questions (FAQ)
Q: Does compatibility affect the chance of getting a 3-star factor?
A: No, getting a 3-star factor at the end of training is based on having at least a B-rank (600) in that stat; the uma musume legacy calculator focuses on inheritance from parents.
Q: Can I use the same parent twice?
A: No, the game requires two distinct parents, but they can share the same grandparents.
Q: How does the calculator handle 1-star vs 3-star factors?
A: The uma musume legacy calculator assigns a weighted point value to each star, reflecting that higher stars grant more points per trigger.
Q: What is the maximum stat gain possible?
A: With 18 stars and max compatibility, it is possible to gain over 150 points in a single stat, though rare.
Q: Do unique skills affect the legacy calculation?
A: Unique skills use a different inheritance logic (Red Factors) and are not included in the blue stat calculation.
Q: Is ‘Great’ compatibility always better?
A: Yes, in every scenario provided by the uma musume legacy calculator, higher compatibility yields more frequent factor triggers.
Q: Does training distance affect inheritance?
A: Distance aptitude affects race performance but does not change the math inside the uma musume legacy calculator.
Q: Can I influence the inheritance during the training run?
A: No, inheritance events are fixed at the start and in April; you can only influence them by choosing better parents beforehand.
Related Tools and Internal Resources
- Speed and Stamina Optimizer – Fine-tune your training distributions.
- Uma Musume Compatibility Database – Find the best matches for your horse girl.
- Skill Proc Calculator – Calculate the probability of your skills activating.
- Training Efficiency Guide – Learn how to maximize your turns.
- G1 Race Planner – Optimize your compatibility by winning common races.
- Factor Grinding Tips – Strategies for farming 3-star blue factors.