Umamusume Affinity Calculator
Calculate breeding affinity between two Umamusume.
What is Umamusume Affinity?
Umamusume Affinity is a key game mechanic in “Uma Musume Pretty Derby” that represents the compatibility between two Umamusume characters, particularly in the context of breeding (inheritance). A higher affinity score between the parent Umamusume used in breeding generally leads to a higher chance of inheriting better stats, skills, and aptitudes for the offspring. Understanding and maximizing Umamusume Affinity is crucial for producing strong racehorses.
This calculator helps you estimate the Umamusume Affinity based on several factors, allowing players to make more informed breeding pair choices. Anyone looking to optimize their breeding outcomes and create top-tier Umamusume should use an Umamusume Affinity calculator.
A common misconception is that only direct parent-child relationships give significant affinity. While they give the highest bonus, other relationships and shared achievements also contribute to the overall Umamusume Affinity.
Umamusume Affinity Formula and Mathematical Explanation
The total Umamusume Affinity score is generally calculated by summing up bonuses from various sources:
Total Affinity = Base Compatibility Score + Relationship Bonus + Shared G1 Wins Bonus + Other Bonuses
Where:
- Base Compatibility Score: An inherent compatibility value between two specific Umamusume characters or lines. This can vary widely and often needs to be looked up from game data or community resources. Our calculator takes this as an input.
- Relationship Bonus: A bonus awarded based on the familial relationship between the two Umamusume in the breeding pedigree (e.g., Parent-Child, Grandparent-Grandchild).
- Shared G1 Wins Bonus: A bonus based on the number of specific G1 races won by both Umamusume or their direct lines, up to a certain cap.
- Other Bonuses: Sometimes, other factors might add small amounts of affinity, though these are less common or harder to quantify universally.
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Base Compatibility | Inherent compatibility between two lines | Points | 20 – 100+ (can vary) |
| Relationship Bonus | Bonus from family ties | Points | 0, 5, 7, 15 |
| Shared G1 Wins | Number of common G1 victories | Wins | 0 – 10 (effective) |
| Shared G1 Wins Bonus | Bonus per shared G1 win | Points | 0 – 20 (e.g., +2 per win up to 10 wins) |
| Total Affinity | Overall compatibility score | Points | 50 – 151+ |
Practical Examples (Real-World Use Cases)
Example 1: Parent-Child Breeding
Let’s say you are breeding Special Week (Child) with Maruzensky (Parent, not in the calculator list but for example). You look up their Base Compatibility and find it’s 40. They have a Parent-Child relationship, and let’s assume they share 3 G1 wins.
- Base Compatibility Score: 40
- Relationship: Parent-Child (Bonus: +15)
- Shared G1 Wins: 3 (Bonus: 3 * 2 = +6)
- Total Umamusume Affinity = 40 + 15 + 6 = 61
A score of 61 is decent, offering a reasonable chance of good inheritance.
Example 2: Unrelated with High Base and Wins
You breed Tokai Teio and Gold Ship. They are unrelated but have a good base compatibility of 55 from your research. They share 5 G1 wins.
- Base Compatibility Score: 55
- Relationship: Other (Bonus: 0)
- Shared G1 Wins: 5 (Bonus: 5 * 2 = +10)
- Total Umamusume Affinity = 55 + 0 + 10 = 65
Even without a direct family tie, a high base and shared wins result in good Umamusume Affinity.
How to Use This Umamusume Affinity Calculator
- Select Umamusume 1 & 2: Choose the two Umamusume you are considering for breeding from the dropdown lists. If your character isn’t listed, select “Other” and manually input the base score.
- Set Relationship: Indicate the relationship between Umamusume 1 and 2 from Umamusume 1’s perspective in the pedigree (e.g., if 2 is 1’s parent, select “Parent-Child”).
- Enter Shared G1 Wins: Input the number of G1 races that appear in the win history of both Umamusume’s lines (usually capped around 5-10 for bonus calculation).
- Enter Base Compatibility Score: Input the base compatibility score between the two selected Umamusume. You might need to consult external guides or game data for this value, especially if using “Other”. A typical range is 25-60, but it can vary. We default to 30.
- Calculate: The calculator automatically updates the Total Umamusume Affinity and its components.
- Read Results: The “Total Affinity” is your primary result. Higher is better. See the breakdown to understand where the affinity comes from.
- Interpret and Decide: Use the Total Umamusume Affinity score to compare different breeding pairs. Scores above 50 are generally good, with 60+ being very good, and 70+ excellent, though the ideal threshold depends on your breeding goals and the specific Umamusume involved.
Key Factors That Affect Umamusume Affinity Results
- Base Compatibility: This is a fundamental score between pairs. Some pairs are naturally more compatible. This value is often data-mined or found in community resources, and it significantly impacts the final Umamusume Affinity.
- Direct Relationships: Parent-Child (+15) and Grandparent-Grandchild (+7) relationships provide the largest fixed bonuses to Umamusume Affinity, making close relatives often good initial breeding partners.
- Shared G1 Wins: Having common G1 race victories in the lineages of both Umamusume adds a variable bonus, usually +2 per shared win up to a cap (e.g., 5 wins for +10). More shared wins boost Umamusume Affinity.
- “Same Character” Bonus: Breeding different versions of the same character (e.g., different outfits/rarities) usually provides a small affinity bonus (+5).
- Pedigree Depth: While not directly in the simple formula, the relationships considered (parent, grandparent) highlight the importance of the immediate pedigree for calculating Umamusume Affinity.
- Game Updates: The exact values for bonuses or how base compatibility is determined might be subject to change with game updates, influencing the real Umamusume Affinity.
Frequently Asked Questions (FAQ)
What is a good Umamusume Affinity score?
While there’s no official “good” score, generally, affinity scores above 50 are considered decent, 60+ is good, and 70+ is very good for increasing inheritance chances. Higher is always better for Umamusume Affinity.
How do I find the Base Compatibility Score?
Base Compatibility Scores are not explicitly shown in-game. You typically need to refer to community-run wikis, databases, or guides that compile this information from game data or extensive testing. This calculator requires you to input it.
Does affinity guarantee good inheritance?
No, high Umamusume Affinity increases the *probability* of inheriting better factors (stats, skills, aptitudes), but it doesn’t guarantee it. There’s still an element of chance involved.
Is it always best to breed with the highest affinity pair?
Not necessarily. While high Umamusume Affinity is beneficial, you also need to consider the stats, skills, and aptitudes of the parents to ensure they pass on desirable traits, even if their affinity is slightly lower than another pair.
What are “Shared G1 Wins”?
These refer to specific G1 races that have been won by Umamusume in both the sire’s and dam’s lineage being considered for the breeding pair. The game checks for common G1 victories to grant an Umamusume Affinity bonus.
Can I breed two Umamusume with no relationship?
Yes, you can breed unrelated Umamusume. Their relationship bonus will be 0, but they can still have a good total Umamusume Affinity through base compatibility and shared G1 wins.
How does the “Same Character” bonus work?
If you breed using two different versions of the same Umamusume (e.g., [Special Dreamer] Special Week and [Starting Future] Special Week), you often get a small fixed Umamusume Affinity bonus.
Where does the +2 per shared G1 win come from?
The +2 points per shared G1 win (up to a cap) is a commonly observed bonus for Umamusume Affinity in the game, though the exact cap can vary or be specific to certain race combinations.
Related Tools and Internal Resources
- Umamusume Breeding Guide: A comprehensive guide to the breeding system and maximizing your Umamusume breeding outcomes.
- Uma Musume Inheritance Explained: Details on how stats, skills, and aptitudes are passed down during Uma Musume inheritance.
- Best Breeding Pairs: Discover some of the best breeding pairs for achieving high Umamusume Affinity and stats.
- Support Card Affinity and Effects: Learn about support card affinity and how it impacts training.
- Training Success Rate Boosters: Tips and tricks to improve your training success rate.
- Umamusume Beginner’s Guide: New to the game? Start with our Umamusume guide for beginners.