Umamusume Affinity Calculator
Calculate the breeding affinity between two Umamusume to improve inheritance chances. Fill in the details below.
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What is the Umamusume Affinity Calculator?
The Umamusume Affinity Calculator is a tool designed for players of the game “Umamusume: Pretty Derby” to estimate the breeding affinity between two parent Umamusume. High affinity is crucial for increasing the chances of inheriting better stats, skills, and aptitudes from the parents and grandparents to the offspring during the breeding process. This calculator helps you optimize your Umamusume breeding guide strategies.
Anyone looking to breed stronger Umamusume and get better inheritance results should use an Umamusume Affinity Calculator. It’s particularly useful when planning which parents to pair together to maximize the potential of the foal. Common misconceptions include thinking that only base compatibility matters, while in reality, shared race history and ancestry play significant roles, which the Umamusume Affinity Calculator helps quantify.
Umamusume Affinity Calculator Formula and Mathematical Explanation
The total affinity score in Umamusume is generally calculated by summing up several components:
- Base Affinity: An inherent compatibility score between the two parent characters.
- Shared G1 Wins Bonus: Points awarded for identical G1 race victories between the parents, and between each parent and the other’s ancestors.
- Shared Ancestors Bonus: Points awarded for having common grandparents.
- Special Pairing Bonus: Extra points for specific, recognized pairings of characters.
- Inbreeding Adjustment: A significant penalty is usually applied if the parents are the same character.
A simplified formula used by this Umamusume Affinity Calculator is:
Total Affinity = Base + (SharedG1_P1P2 * 2) + SharedG1_P1P2Anc + SharedG1_P2P1Anc + (SharedGrandparents * 5) + SpecialBonus + InbreedingAdjustment
Where Inbreeding Adjustment is a large negative number (e.g., -50 or -100) if parents are the same, and 0 otherwise.
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Base Affinity | Initial compatibility between parents | Points | 0 – 150 |
| SharedG1_P1P2 | Shared G1 wins between P1 and P2 | Wins | 0 – 10 |
| SharedG1_P1P2Anc | Shared G1 wins between P1 and P2’s ancestors | Wins | 0 – 20 |
| SharedG1_P2P1Anc | Shared G1 wins between P2 and P1’s ancestors | Wins | 0 – 20 |
| SharedGrandparents | Number of common grandparents | Count | 0 – 4 |
| SpecialBonus | Bonus for specific pairings | Points | 0 – 50 |
| InbreedingAdjustment | Penalty for identical parents | Points | -100 to 0 |
Variables used in the Umamusume Affinity Calculator.
Practical Examples (Real-World Use Cases)
Example 1: High Affinity Pair
Let’s say you are breeding Special Week with Silence Suzuka, a known good pair.
- Base Affinity: 100 (hypothetical high base)
- Same Parents: No (0)
- Shared G1 P1&P2: 2
- Shared G1 P1&P2Anc: 3
- Shared G1 P2P1Anc: 4
- Shared Grandparents: 1
- Special Bonus: 30 (for the pair)
Total Affinity = 100 + (2*2) + 3 + 4 + (1*5) + 30 + 0 = 100 + 4 + 3 + 4 + 5 + 30 = 146. This high score from the Umamusume Affinity Calculator suggests good inheritance chances.
Example 2: Low Affinity Pair with Inbreeding
Breeding Gold Ship with Gold Ship (using one as parent, another as rental):
- Base Affinity: 30 (assuming low base for self)
- Same Parents: Yes (-70 adjustment)
- Shared G1 P1&P2: 5 (all wins are shared)
- Shared G1 P1&P2Anc: 8
- Shared G1 P2P1Anc: 8
- Shared Grandparents: 4 (all shared)
- Special Bonus: 0
Total Affinity = 30 + (5*2) + 8 + 8 + (4*5) + 0 – 70 = 30 + 10 + 8 + 8 + 20 – 70 = 7. The Umamusume Affinity Calculator shows a very low score due to the inbreeding penalty, despite many shared elements.
How to Use This Umamusume Affinity Calculator
- Enter Base Affinity: Input the base score between the two parents you are considering. You might find this from online resources or estimate it.
- Indicate Inbreeding: Select “Yes” if both parents are the same character.
- Input Shared G1 Wins: Fill in the number of identical G1 race wins between the parent pair, and between each parent and the other’s ancestors. Check your Umamusume G1 race guide for details.
- Enter Shared Grandparents: Count and enter the number of grandparents that are the same for both parents.
- Add Special Bonus: If the pair has a known special bonus, enter it.
- Calculate and Review: Click “Calculate” (or observe real-time updates). The Umamusume Affinity Calculator will show the Total Affinity, intermediate bonuses, a table breakdown, and a chart.
- Interpret Results: A higher total affinity (ideally above 100-120) generally indicates better inheritance odds. Scores above 151 are very good.
Key Factors That Affect Umamusume Affinity Calculator Results
- Base Compatibility: The fundamental affinity between two characters, often influenced by their lore or in-game relationships.
- Shared Race History (G1 Wins): Winning the same prestigious G1 races adds significant points, showing a shared legacy.
- Ancestry Links: Having common grandparents strengthens the bloodline connection, boosting affinity. Check Umamusume character stats and lineage.
- Special Pairings: Some character combinations are designed to have innate synergy, providing a bonus.
- Inbreeding: Using the same character as both parents drastically reduces affinity, although it might be done for specific inheritance goals despite the penalty.
- Support Card Configuration: While not directly in the affinity calculation, your best support cards Umamusume setup influences training and the stats of parents, indirectly affecting the value of inheritance.
Frequently Asked Questions (FAQ)
A: Generally, scores above 120 are considered good, and 151 or higher is excellent, leading to more “blue” (good) inheritance factors. The Umamusume Affinity Calculator helps aim for these values.
A: Base affinity values are often datamined or compiled by the community and found in guides or online spreadsheets dedicated to Umamusume breeding.
A: No, high affinity increases the *probability* of good inheritance (more blue factors, higher star factors), but it’s still subject to RNG.
A: The game heavily penalizes inbreeding (using the same character as both parents) in the affinity calculation to encourage diverse pairings, though it might sometimes be used to target specific genes.
A: Winning the same G1 races signifies a similar career path and adds points. The more important the race and the more ancestors share it, the better.
A: Yes, the calculator works the same way whether you own both parents or are using one from your friend/follow list as a rental.
A: These are specific combinations of Umamusume that have a known bonus affinity due to their relationship in the story or lore (e.g., Special Week and Silence Suzuka).
A: This calculator specifically looks at the number of shared grandparents for a direct bonus, and their G1 wins as part of the ancestral G1 win count. More detailed lineage might have subtle effects not covered here.
Related Tools and Internal Resources
- Umamusume Breeding Planner: Plan your breeding pairs and track lineage.
- Umamusume G1 Race Guide: Information on G1 races for parents and ancestors.
- Best Support Cards Umamusume: Guide to selecting support cards to train your parent Umamusume.
- Umamusume Character Stats: Details on base stats and aptitudes for various characters.
- Umamusume Training Calculator: Optimize your training sessions for better parent stats.
- Umamusume Event Guide: Stay updated on events that might give breeding advantages.