Umamusume Affinity Calculator

Optimize your inheritance for Double Circle ◎ compatibility

What is the Umamusume Affinity Calculator?

The umamusume affinity calculator is a specialized tool designed for players of “Umamusume: Pretty Derby” to determine the inheritance compatibility (Aishou) between a trainee and their parents. In the world of competitive Umamusume training, achieving a Double Circle ◎ rank is the holy grail for passing on powerful white factors and high-stat blue factors.

New players often mistake base character compatibility for the only factor in inheritance. However, the umamusume affinity calculator proves that race victories and genetic lineage play an equally critical role. By using this tool, trainers can predict whether their pairing will result in a “Triangle” (Poor), “Circle” (Good), or “Double Circle” (Excellent) inheritance event.

Umamusume Affinity Calculator Formula and Mathematical Explanation

The mathematical logic behind the umamusume affinity calculator involves summing various point-based bonuses accumulated through character relationships and training history. The formula used by our calculator follows the community-researched standards for the Japanese and Global versions of the game.

The Core Formula:

Total Points = [(Base Compatibility) + (Total Shared G1 Wins) + (Ancestor Bonus)] × Synergy Multiplier

Variable	Meaning	Typical Range	Impact
Base Compatibility	The static point value between two specific Umamusume.	0 – 100	High
Shared G1 Wins	Number of identical G1 races both parents won in their training.	0 – 24	Moderate
Ancestor Bonus	Points gained from matching grandparents.	0 – 60	Medium
Synergy Multiplier	Hidden bonuses for specific narrative relations.	1.0x – 1.2x	Significant

Table 1: Key variables used in the umamusume affinity calculator to determine inheritance rank.

Practical Examples (Real-World Use Cases)

Example 1: The Long-Distance Specialist Pair

Imagine you are training a Mejiro McQueen and you select Gold Ship as a parent. Your umamusume affinity calculator inputs might look like this:

• Base Compatibility: 65
• Shared G1 Wins: 12 (both won Arima Kinen, Kikuka Sho, etc.)
• Lineage Points: 40
• Synergy: 1.1x

Result: (65 + 12 + 40) × 1.1 = 128.7 Points. This results in a Circle ○ rank, which is very stable for most training scenarios.

Example 2: The Double Circle Optimization

To reach the coveted Double Circle, a trainer uses a highly compatible base and maximizes G1 wins during the parent’s training runs. Using the umamusume affinity calculator:

• Base Compatibility: 80
• Shared G1 Wins: 22 (High-efficiency race rotation)
• Lineage Points: 55
• Synergy: 1.0x

Result: 80 + 22 + 55 = 157 Points. Since this exceeds the 150-point threshold, the umamusume affinity calculator displays the Double Circle ◎ status.

How to Use This Umamusume Affinity Calculator

1. Enter Base Affinity: Consult an affinity chart for your character pair and input the number.
2. Input G1 Wins: Count how many common G1 races both parents have won. This is the primary way to “grind” affinity.
3. Add Lineage Bonus: If the grandparents of the parents match or are highly compatible, add these points.
4. Adjust Synergy: Select the multiplier if the characters have a special lore-based bond.
5. Review the Result: Look at the large rank indicator. Aim for 150+ for the best results.

Key Factors That Affect Umamusume Affinity Results

Understanding the umamusume affinity calculator requires knowledge of several internal game mechanics that dictate success:

• G1 Race Overlap: The most controllable factor. Winning the same G1 races (like the Classic Triple Crown) on both parents significantly boosts points.
• Character Archetypes: Certain archetypes, like “Leaders” or “Stayers,” often have higher base affinity with each other.
• Family Tree Depth: The umamusume affinity calculator considers not just parents, but grandparents. Duplicate ancestors can sometimes reduce total points depending on the game version.
• Seasonal Events: While rare, some game updates adjust character compatibility values, necessitating an update to your calculations.
• Specific Race Bonuses: Some races, like the Arima Kinen, are weighted slightly differently in hidden synergy calculations.
• Inherited Factors: High affinity directly correlates to the percentage chance of “White Factors” triggering during the inheritance events in April of years 2 and 3.

Frequently Asked Questions (FAQ)

What is the threshold for Double Circle ◎ in the umamusume affinity calculator?

Generally, the 150-point mark is the recognized threshold for Double Circle ◎ in the umamusume affinity calculator. Values between 51 and 150 result in a Single Circle ○.

Do G2 and G3 races affect affinity?

In most calculation models used by the umamusume affinity calculator, G2 and G3 races provide negligible or zero points compared to the significant boost from G1 victories.

Why is my affinity still low even with many wins?

Check your base compatibility. If the two Umamusume have a base affinity of 0 (lore rivals), even 20 shared G1 wins might only bring you to a Single Circle.

Can I get Double Circle without shared G1 wins?

It is extremely difficult. Most pairings require at least 10-15 shared wins to cross the 150-point threshold unless their base compatibility is exceptionally high.

Does affinity affect Blue Factor (Stats) inheritance?

Yes, higher affinity increases the probability of receiving more “stars” and triggers from the parents’ factors during training events.

Is the calculator accurate for the Global version?

Yes, the umamusume affinity calculator uses logic that applies to the standard inheritance system found in both the JP and Global servers.

How do I increase Lineage Points?

Lineage points are increased by choosing grandparents who are highly compatible with each other and the current trainee.

Does a low affinity mean I shouldn’t use the parent?

Not necessarily. If a parent has a “9-star Blue Factor,” it might be worth using even with a Single Circle rank, though Double Circle is always preferred for optimization.

Related Tools and Internal Resources

• Comprehensive Umamusume Breeding Guide – A deep dive into stat inheritance.
• G1 Race Schedule Optimizer – Plan your parent training runs for maximum overlap.
• Factor Probability Calculator – Estimate the odds of getting 3-star factors.
• Umamusume Speed Calculator – Calculate target speeds for URA Finals and beyond.
• Support Card Tier List – Find the best cards to pair with your high-affinity trainees.