uma musume affinity calculator

Optimize your inheritance compatibility and maximize stat gains for your Umamusume.

What is the Uma Musume Affinity Calculator?

The Uma Musume Affinity Calculator is an essential tool for trainers looking to maximize the potential of their Umamusume through the inheritance system. In the game, affinity (often referred to as compatibility) determines the likelihood of inheriting blue factors (stats), red factors (aptitudes), and green factors (unique skills) during the succession events in April of years 2 and 3.

Using an Uma Musume Affinity Calculator allows you to predict whether your chosen parents will result in a Single Circle (○) or the highly coveted Double Circle (◎) compatibility. Higher affinity directly correlates to more stat gains and a higher chance of rank-up for aptitudes, which is critical for competitive PvP and high-rank CM (Champions Meeting) builds.

Uma Musume Affinity Calculator Formula and Mathematical Explanation

The calculation for affinity is multi-layered, involving base character relationships and shared historical achievements. The Uma Musume Affinity Calculator uses the following logic to estimate your total score:

Variable	Meaning	Unit	Typical Range
Base Score	Hidden compatibility between two specific characters	Points	0 – 100
G1 Bonus	Points earned from shared G1 race victories	Points/Race	1.1 per race
Grandparent Bonus	Compatibility inherited from the previous generation	Multiplier	0.15 of GP score
Total Score	Final value determining the compatibility rank	Points	0 – 150+

The core formula used by the Uma Musume Affinity Calculator is:
Total Affinity = Base Compatibility + (Shared G1 Wins × 1.1) + ((GP1 + GP2) × 0.15)

Practical Examples (Real-World Use Cases)

Example 1: The Classic "Loop" Strategy

If you are using Mejiro McQueen and Gold Ship as parents, they have a high base compatibility. If both have won 15 identical G1 races (like the Arima Kinen and Tenno Sho Spring), the Uma Musume Affinity Calculator would show a massive G1 bonus of 16.5 points, likely pushing the total into the ◎ range even with average grandparents.

Example 2: Low Base Compatibility Correction

When pairing characters with low base compatibility (e.g., characters from different eras or specialties), you must compensate. By winning 25+ G1 races on both parents, you can use the Uma Musume Affinity Calculator to see that the G1 bonus (27.5 points) can bridge the gap to reach a ○ rank, making inheritance viable.

How to Use This Uma Musume Affinity Calculator

1. Enter Base Score: Look up the base compatibility for your two chosen parents. Most "Best Friends" have scores above 70.
2. Input G1 Wins: Count how many G1 races both parents won during their respective training runs. Common ones include the Triple Crown races.
3. Add Grandparent Data: Input the compatibility scores of the grandparents to account for lineage depth.
4. Analyze Results: The Uma Musume Affinity Calculator will instantly update the Rank (△, ○, or ◎).
5. Optimize: If you are short of ◎, try to increase the shared G1 wins in your next parent training session.

Key Factors That Affect Uma Musume Affinity Results

• Character Relationships: Characters who are roommates, rivals, or teammates in the lore often have higher base scores in the Uma Musume Affinity Calculator.
• G1 Race Overlap: Winning the same races is the most controllable way to boost affinity. The "G1 Bonus" is the foundation of high-level breeding.
• Distance Aptitudes: Characters with similar distance preferences (e.g., both Long Distance) tend to have better natural compatibility.
• Grandparent Quality: The affinity of the grandparents affects the parents, creating a "Factor Loop" that compounds over generations.
• Scenario Bonuses: Certain training scenarios may offer hidden modifiers to how factors are inherited, though the base affinity remains the primary driver.
• Unique Skill Compatibility: While not directly part of the numerical score, similar unique skill types often align with high-affinity pairings.

Frequently Asked Questions (FAQ)

1. What score is needed for Double Circle (◎) in the Uma Musume Affinity Calculator?

Generally, a total score exceeding 80 points is required to achieve the ◎ rank, though this can vary slightly based on the specific version of the game's hidden math.

2. Does winning G2 or G3 races help affinity?

No, the Uma Musume Affinity Calculator only accounts for G1 races. G2 and G3 wins do not contribute to the inheritance compatibility bonus.

3. Can I reach ◎ with 0 G1 wins?

It is possible only if the base compatibility between the characters is exceptionally high (e.g., 80+), but it is very rare without at least some G1 overlap.

4. Why did I get poor inheritance despite a ◎ rank?

Affinity increases the *probability* of inheritance; it does not guarantee it. Even with the Uma Musume Affinity Calculator showing high scores, RNG still plays a role.

5. How many G1 races are there to win?

There are approximately 30 G1 races available in a standard training run, though most characters can realistically win 10-22 depending on their aptitudes.

6. Does the parent's rank (A, S, UG) affect affinity?

No, the training rank of the parent does not change the affinity score in the Uma Musume Affinity Calculator, only the quality of the factors they might pass down.

7. Is the G1 bonus capped?

There is no hard cap, but the number of available G1 races naturally limits the maximum bonus you can achieve.

8. How often should I use the Uma Musume Affinity Calculator?

You should use it every time you plan a new breeding cycle, especially when aiming for specific stat caps in high-level scenarios.