Umamusume Affinity Calculator

Calculate the breeding affinity score between two Umamusume based on their lineage compatibility. A higher score generally leads to better inheritance. Use our Umamusume Affinity Calculator for optimal breeding!

Affinity Calculator

Parent 1 Lineage

Parent 2 Lineage

Compatibility Summary

Relationship	Compatibility	Value

Summary of selected compatibilities and their scores.

What is an Umamusume Affinity Calculator?

An Umamusume Affinity Calculator is a tool used by players of the game “Umamusume: Pretty Derby” to estimate the breeding affinity between two parent Umamusume (horse girls). Affinity is a crucial factor in the game’s breeding system, as higher affinity between parents and their lineages generally leads to a higher chance of inheriting better stats, skills, and aptitudes for the offspring. The Umamusume Affinity Calculator helps players make informed decisions when selecting breeding pairs to maximize the potential of their new Umamusume.

Anyone who plays Umamusume and engages with the breeding system should use an Umamusume Affinity Calculator. It’s especially useful for players aiming to raise top-tier Umamusume for races and championships. Common misconceptions are that only the direct parents matter, but the entire lineage up to great-grandparents significantly impacts the total affinity score, which the Umamusume Affinity Calculator considers.

Umamusume Affinity Calculator Formula and Mathematical Explanation

The affinity score in Umamusume is calculated based on the compatibility ratings between various pairs within the lineage of the two breeding parents. While the exact in-game formula might have more nuances, a widely accepted model sums up the values assigned to compatibility symbols (◎, ◯, △, X) across different relationships. Our Umamusume Affinity Calculator uses the following base values:

• ◎ (Very Good/Double Circle): 25 points
• ◯ (Good/Circle): 15 points
• △ (Okay/Triangle): 10 points
• X (Bad/Cross): 5 points

The total affinity is the sum of points from:

1. Compatibility between Parent 1 and Parent 2.
2. Compatibility between Parent 1 and her Father & Mother.
3. Compatibility between Parent 2 and her Father & Mother.
4. Compatibility between Parent 1’s Father/Mother and their respective parents (P1’s Grandparents).
5. Compatibility between Parent 2’s Father/Mother and their respective parents (P2’s Grandparents).

So, Total Affinity = (P1-P2) + (P1-P1F + P1-P1M) + (P2-P2F + P2-P2M) + (P1F-P1GF + P1F-P1GM + P1M-P1MF + P1M-P1MM) + (P2F-P2GF + P2F-P2GM + P2M-P2MF + P2M-P2MM).

Variable	Meaning	Unit	Typical Range
P1-P2	Parent 1 & Parent 2 Compatibility Score	Points	5, 10, 15, 25
P1-P1F	Parent 1 & P1 Father Compatibility Score	Points	5, 10, 15, 25
P1-P1M	Parent 1 & P1 Mother Compatibility Score	Points	5, 10, 15, 25
… etc.	Compatibility between other lineage pairs	Points	5, 10, 15, 25
Total Affinity	Sum of all compatibility scores	Points	65 – 325 (for this calculator)

Our Umamusume Affinity Calculator implements this summation.

Practical Examples (Real-World Use Cases)

Example 1: High Affinity Breeding

A player wants to breed Special Week (Parent 1) with Silence Suzuka (Parent 2). They check the lineage and find many ◎ and ◯ compatibilities:

• P1-P2: ◎ (25)
• P1 Lineage (to grandparents): Mostly ◯ and ◎ (average 18 per link, 6 links = 108)
• P2 Lineage (to grandparents): Mostly ◯ and ◎ (average 19 per link, 6 links = 114)

Total Affinity = 25 + 108 + 114 = 247. This is a very high score, suggesting a good chance of strong inheritance. The Umamusume Affinity Calculator would show a high total.

Example 2: Low Affinity Breeding

A player attempts to breed Gold Ship (Parent 1) with Mejiro McQueen (Parent 2), but their lineage has many X and △ compatibilities:

• P1-P2: △ (10)
• P1 Lineage: Mostly X and △ (average 8 per link, 6 links = 48)
• P2 Lineage: Mostly △ (average 10 per link, 6 links = 60)

Total Affinity = 10 + 48 + 60 = 118. This is a low score, and the player might reconsider the pairing or expect weaker inheritance, as indicated by the Umamusume Affinity Calculator.

How to Use This Umamusume Affinity Calculator

1. Select Compatibilities: For each pair listed (Parent 1 & Parent 2, Parent 1 & her parents, etc.), use the dropdown menus to select the compatibility symbol (◎, ◯, △, X) you observe or know from the game/databases.
2. View Results: The “Total Affinity Score” will update automatically as you change the selections. Intermediate scores for different generational contributions are also shown.
3. Check Chart and Table: The chart visualizes the affinity contribution from each level, and the table summarizes your selections.
4. Reset: Use the “Reset” button to return all selections to default values (◯).
5. Copy Results: Use “Copy Results” to copy the scores and key inputs.

The higher the Total Affinity Score from the Umamusume Affinity Calculator, the better the chances of good inheritance during breeding. Scores above 151 are generally considered good, and above 200 very good.

Key Factors That Affect Umamusume Affinity Calculator Results

• Direct Parent Compatibility: The relationship between the two Umamusume you choose to breed is a significant factor. Some pairs have naturally high base affinity.
• Parent-Grandparent Compatibility: The compatibility between your chosen parents and their own parents (the offspring’s grandparents) adds a substantial amount to the total.
• Grandparent-Great-Grandparent Compatibility: Extending further back, the relationships within the grandparent generation also contribute. A strong lineage boosts affinity.
• Specific Character Bonuses: Some specific combinations of characters in the lineage might grant bonus affinity points not directly shown by the simple symbols but known through game data. Our Umamusume Affinity Calculator focuses on the visible symbols.
• In-game Events/Updates: Sometimes, game updates might subtly tweak how affinity is calculated or which pairs have better compatibility.
• Accuracy of Information: The results of the Umamusume Affinity Calculator depend on the accuracy of the compatibility symbols you input, which you usually get from in-game indicators or community resources.

Frequently Asked Questions (FAQ)

What is a good affinity score in Umamusume?

Generally, scores above 151 are considered good, and the higher, the better. Scores above 200-220 are excellent. The Umamusume Affinity Calculator helps you find these scores.

How do I find the compatibility symbols (◎, ◯, △, X)?

In the game, when selecting breeding parents and viewing their lineage, compatibility symbols are often displayed between connected characters. Community databases and breeding simulators also provide this information.

Does the Umamusume Affinity Calculator guarantee good inheritance?

No, a high affinity score increases the *probability* of good inheritance (more blue factors, better stats/skills), but it’s still subject to RNG (Random Number Generation). It improves your odds significantly.

Can I breed Umamusume with low affinity?

Yes, but the chances of inheriting desired traits are lower. It might take more attempts to get a good result.

Are there hidden affinity values?

Yes, it’s widely believed there are hidden values and bonuses for certain character combinations beyond the visible symbols. This Umamusume Affinity Calculator focuses on the visible and commonly accepted symbol values.

How often should I use an Umamusume Affinity Calculator?

Use it every time you are planning a breeding session, especially when trying to create a strong Umamusume for a specific goal.

Does the order of parents matter in the calculator?

For the total score, no. But make sure you input the correct lineage for Parent 1 and Parent 2 respectively.

What if I don’t know the compatibility for great-grandparents?

If unsure, you can assume a default like ◯ (15 points) or try to find the information from game databases. The more accurate your input, the better the Umamusume Affinity Calculator result.