Affinity Calculator Uma Musume

An essential tool for optimizing inheritance and building champion horse girls.

Calculate Inheritance Affinity

Affinity Rank: ◯ (Circle)

Affinity Contribution

Visual breakdown of where your affinity points are coming from.

What is the Affinity Calculator Uma Musume?

In Umamusume: Pretty Derby, **Affinity** is a critical, yet often hidden, mechanic that determines the quality of inheritance your trainee receives from her “parents” (or Legacies). A higher affinity score dramatically increases the chances of inheriting higher-level skills (Sparks) and receiving larger starting stat boosts. This **affinity calculator uma musume** helps you quantify this compatibility, moving beyond the simple in-game symbols (△, ◯, ◎) to give you a precise score.

This tool is for trainers who want to optimize their breeding and training cycles. By understanding the factors that contribute to affinity, such as character relationships, shared G1 race wins, and compatibility in race strategy, you can make more informed decisions when selecting legacy characters. The ultimate goal is to consistently achieve a “Double Circle” (◎) rating, which requires an affinity score of 151 or higher, ensuring the best possible start for your trainee. For more detailed strategies, a Uma Musume beginner’s guide is an excellent resource.

Affinity Calculator Uma Musume Formula

The total affinity score is a sum of several components. While the exact internal formula has been reverse-engineered by the community, our calculator uses a widely accepted model to provide a reliable estimate.

Total Affinity = Base Affinity + (Shared G1 Wins * Points per Win) + Compatibility Bonus

Here’s a breakdown of the variables used in our affinity calculator uma musume:

Variable	Meaning	Unit	Typical Range
Base Affinity	The sum of compatibility points from character relationship groups between the trainee, her two parents, and four grandparents.	Points	20 – 100+
Shared G1 Wins	The number of times a G1 race was won by multiple related characters in the lineage (e.g., parent-grandparent pair).	Count	0 – 20+
Points per Win	A fixed point value awarded for each shared G1 win. This is often cited as 3 points per win.	Points	3
Compatibility Bonus	Bonus points awarded if the legacy characters share the same preferred race distance or running strategy as the trainee.	Points	0 – 10

Practical Examples

Example 1: Beginner Setup

A new player is training Special Week. They choose two parents that have a few relationship bonuses and one or two shared G1 wins among the lineage.

• Inputs:
  • Base Affinity: 35
  • Shared G1 Race Wins: 2
  • Parent Compatibility: Poor (0)
• Calculation: 35 + (2 * 3) + 0 = 41
• Result: An affinity score of 41, which falls into the **△ (Triangle)** category. This is a suboptimal pairing, and the player should seek better legacy parents.

Example 2: Optimized Breeding Setup

An advanced player is meticulously planning a legacy loop. They have curated parents and grandparents who are in multiple high-value relationship groups and have farmed specific G1 race wins. Many great Uma Musume guides and tools can help with this planning.

• Inputs:
  • Base Affinity: 90
  • Shared G1 Race Wins: 22
  • Parent Compatibility: Excellent (10)
• Calculation: 90 + (22 * 3) + 10 = 166
• Result: An affinity score of 166. This is a fantastic result, comfortably achieving the **◎ (Double Circle)** rank and maximizing the potential for stat and skill inheritance.

How to Use This Affinity Calculator Uma Musume

Follow these steps to effectively use the calculator and interpret your results:

1. Determine Base Affinity: This is the most complex part. Use an external tool like the one on GameTora to find the compatibility ratings between your trainee and her full lineage (2 parents, 4 grandparents). Add up all the points from the groups they belong to and enter the total here.
2. Count Shared G1 Wins: Carefully check the race histories of your two parents and four grandparents. For each G1 race (like the Satsuki Sho or Arima Kinen), add a point if it was won by both a parent and their parent, or by both parents. Enter the total count.
3. Select Parent Compatibility: Assess if the parents’ primary distance (e.g., Short, Mile, Medium, Long) and strategy (e.g., Runner, Leader, Betweener, Chaser) match your trainee’s strengths. Select the appropriate bonus.
4. Analyze Your Results: The calculator provides a total score and a corresponding rank.
   • △ (Triangle, 1-50): Poor. Avoid using this combination if possible.
   • ◯ (Circle, 51-150): Good. This is the standard for most training runs.
   • ◎ (Double Circle, 151+): Excellent. This is the goal for competitive builds, offering the highest chance for powerful inheritance.

For in-depth explanations on game mechanics, you might find this guide to building strong Umamusume very helpful.

Key Factors That Affect Affinity

• Character Groups: The primary source of affinity. Certain groups of characters have innate compatibility scores. Having multiple members of a high-value group in your lineage provides a massive point boost.
• Shared G1 Wins: A farmable way to increase affinity. Intentionally winning the same G1 races across generations is a key strategy for advanced players.
• Parent-Trainee Similarity: The game rewards you for logical pairings. Matching a long-distance trainee with long-distance parents gives a small but helpful bonus.
• Grandparent stats (Blue Factors): While not directly part of the affinity *score*, the quality of the grandparents’ stats (the blue sparks) is what you *get* from good affinity. High affinity increases the chance these stats are passed down.
• Inheritance Events: Good affinity directly boosts the results of the “Sparks of Inspiration” events that occur during a career run, leading to more stats and skill hints.
• Avoiding “Triangle” Pairs: The penalty for low affinity (△) is severe. It drastically reduces the chance of inheriting good skills and stats, making a run much more difficult.

Frequently Asked Questions (FAQ)

1. What is the highest possible affinity score?

There is no known hard cap. While 151 is the threshold for the best rank (◎), players have achieved scores well over 200 through meticulous planning.

2. Is a Double Circle (◎) rank guaranteed to give the best inheritance?

No, but it gives you the highest *chance*. Inheritance still has a significant random element (RNG), but a ◎ rank maximizes your odds of a favorable outcome.

3. How much does each shared G1 win give?

The community has largely settled on a value of 3 points per applicable win.

4. Does it matter which version of a character I use (e.g., different outfits)?

No, for affinity calculation purposes, all versions of a character are treated the same. For example, [Summer] Special Week has the same relationship values as the standard Special Week.

5. Where can I find the character relationship groups for the Base Affinity value?

Websites like GameTora have comprehensive databases and tools that list all the known character compatibility groups and their point values.

6. Should I prioritize high affinity over good skills on parents?

It’s a balance. Ideally, you want both. However, for a competitive build, high affinity is often the priority because it increases the chance of inheriting the *specific* powerful skills you want from the parents.

7. Does the “Base Affinity” input in this calculator account for grandparents?

Yes, you should use an external tool to sum the affinity from all character relationships (trainee-parent, parent-parent, parent-grandparent) and enter that single number as the “Base Affinity.”

8. What is a “legacy loop”?

A “legacy loop” or “spark loop” is the process of repeatedly training characters with the specific goal of creating ideal parents and grandparents with high-star factors and specific G1 wins, to then be used for training a final, competitive character. A high affinity score is central to this strategy.