Uma Affinity Calculator
Estimate training turns to reach "Friendship Training" status.
Formula: (Target Bond – Initial Bond – Event Bonus) / Base Gain per Session.
Bond Progression Forecast
| Session # | Estimated Bond | Status |
|---|
What is the Uma Affinity Calculator?
The Uma Affinity Calculator is an essential tool for players of Uma Musume Pretty Derby who want to maximize their training efficiency. In the game, "Affinity" (also known as the Bond Gauge or Kizuna) represents the relationship between your trainee horse girl and her support cards. Reaching a high affinity is critical because once a support card's bond gauge reaches 80 (turning orange/yellow), it unlocks "Friendship Training," commonly known as Rainbow Training.
Using this Uma Affinity Calculator, trainers can plan their early-game turns to ensure they hit that magic number as quickly as possible, allowing for explosive stat growth in the middle and late stages of a training run.
Uma Affinity Calculator Formula and Mathematical Explanation
The logic behind the Uma Affinity Calculator follows a linear progression model with step-wise adjustments for random events. The core formula used by the Uma Affinity Calculator is:
S = ceil((T – I – E) / G)
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| S | Sessions Needed | Turns | 5 – 15 |
| T | Target Bond | Points | 80 or 100 |
| I | Initial Bond | Points | 0 – 35 |
| E | Event Bonus | Points | 5 – 20 |
| G | Gain per Session | Points | 7 – 10 |
Practical Examples (Real-World Use Cases)
Example 1: High-Tier SSR Card
Suppose you are using a high-limit-break SSR card with an "Initial Bond" of 30. Your goal is to trigger Rainbow Training (80 points). The Uma Affinity Calculator would calculate: (80 – 30 – 10 estimated event points) / 7 = 5.7. You would need approximately 6 sessions where that card appears in your training menu.
Example 2: Low-Level R Card
For a basic R-tier card with 0 Initial Bond, reaching 80 requires significantly more work. (80 – 0 – 5 estimated event points) / 7 = 10.7. You would need 11 sessions. The Uma Affinity Calculator helps you realize that R-tier cards require much more "babysitting" in the early game.
How to Use This Uma Affinity Calculator
1. Input Initial Bond: Check your support card's "Initial Bond Gauge" sub-stat in the deck-building screen and enter it into the Uma Affinity Calculator.
2. Set Base Gain: Most scenarios provide 7 points per session. If you are in a special scenario with bond buffs, adjust this value.
3. Estimate Events: Support cards usually have 2-3 random events that grant 5-10 bond each. We recommend setting this to 10 for a realistic middle-ground estimate.
4. Analyze Results: The Uma Affinity Calculator will instantly update the sessions required and provide a visual progression chart.
Key Factors That Affect Uma Affinity Results
- Card Rarity: SSR cards typically have higher initial bond stats than SR or R cards.
- Limit Breaks: Maxing out a card often increases the Initial Bond Gauge stat significantly.
- Scenario Mechanics: Scenarios like MNT or Grand Live may have unique ways to boost bond faster.
- Random Events: The "Event Bonus" in the Uma Affinity Calculator is an estimate; actual results may vary based on RNG.
- Hint Training: If a card has a "!" hint, it usually provides a larger bond boost (often +5 extra).
- Crowd Size: Training with multiple cards at once doesn't increase the bond per card, but it makes your turn more efficient overall.
Frequently Asked Questions (FAQ)
Why is 80 bond the target in the Uma Affinity Calculator?
80 is the threshold where the bond gauge turns orange, enabling Friendship (Rainbow) Training if the card is on its specialized stat.
Can I reach 100 bond through training alone?
Yes, but it is often more efficient to stop focusing on a card once it hits 80 and let random events take it to 100.
Does the Uma Affinity Calculator account for Hints?
Hints add extra points. If you expect many hints, increase the "Base Bond Gain" in the calculator to 10 or 12.
Is the "Initial Bond" the same for all cards?
No, it depends on the specific Support Card and its level/limit break status.
Does Training Level affect bond gain?
Generally, no. Bond gain remains static regardless of whether the training is Level 1 or Level 5.
How does "Cupid" or "Group" cards work?
Group cards often have different bond mechanics, but the 80-point threshold for "Friendship" still applies to their unique effects.
Can I lose affinity?
No, bond levels do not decrease in Uma Musume Pretty Derby.
What is "Rainbow Training"?
It is a high-efficiency training session that occurs when a support card with 80+ bond is at its primary training type.
Related Tools and Internal Resources
- Comprehensive Support Card Guide: Learn which cards have the best initial bond.
- General Training Tips: Master the art of the early game.
- Scenario Strategy: How to adapt your Uma Affinity Calculator use to different scenarios.
- Stat Calculation Guide: Understand how bond translates to raw power.
- Bond Increase Guide: Deep dive into hidden multipliers.
- Best Support Cards for F2P: Budget options with high initial bond.