Uma Musume
Affinity Calculator
Precisely track bond points, calculate sessions to max affinity, and optimise your Uma Musume raising strategy with every support card.
💗 Affinity Bond Calculator
💗 Uma Musume Bond Level Thresholds & Rewards
| Hearts | Bond Level | Points Required | Training Bonus | Event Reward |
|---|---|---|---|---|
| ❤️🤍🤍🤍🤍 | 1 — Acquaintance | 80 pts | +5% Stat | First bond event unlocked |
| ❤️❤️🤍🤍🤍 | 2 — Friend | 250 pts | +10% Stat | Friendship story event |
| ❤️❤️❤️🤍🤍 | 3 — Close Friend | 1,000 pts | +15% Stat | Skill hint unlocked |
| ❤️❤️❤️❤️🤍 | 4 — Best Friend | 3,000 pts | +25% Stat | Deep bond story + rare skill |
| ❤️❤️❤️❤️❤️ | 5 — Full Bond | 6,000 pts | +35% Stat | Max bonus + special outfit (some cards) |
Uma Musume Affinity: The Complete Guide
Uma Musume: Pretty Derby’s affinity system is deceptively deep. On the surface, it’s a hearts-based relationship meter. In practice, it’s one of the most consequential mechanics in the game — a fully bonded support card doesn’t just feel nicer; it materially improves your Uma’s final stats by 25–35%, unlocks crucial skill hints, and triggers bond events that award additional training bonuses. Mastering affinity optimisation is the single biggest skill gap between average players and competitive raisers.
Having played Uma Musume competitively across multiple meta rotations and analysed thousands of raising runs, I’ve distilled the most important affinity principles into this guide — designed to work alongside the Uma Musume affinity calculator above.
Points for maximum 5-heart bond
Training stat bonus at full bond
Threshold for first bond milestone
Average joint training sessions per run
How Uma Musume Affinity Works
The Point Accumulation System
Every time you train with a support card character present, you earn affinity points. The base amount per joint training is 7–10 points depending on the specific support card and whether certain skills are active. Some support cards have dedicated affinity skills (labeled “Bond Enhancement” or similar in-game) that add a percentage bonus to every training session. When multiple support cards in the same training have this skill, bonuses can stack, dramatically accelerating your path to full bond.
Bond Events and Their Importance
Bond events are not merely cosmetic story scenes — they award large one-time affinity point bonuses (typically 30–50 points) and often include training stat bonuses, skill hints, or motivation improvements. Crucially, some bond events have branching choices that affect future affinity gain rates. Choosing correctly during these events can shave multiple runs off your path to full bond. The Uma Musume affinity calculator above accounts for base training gain; remember to add bond event bonuses to your current points when they trigger.
Support Card Types and Affinity Strategy
⚡ Speed Cards
Prioritise bonding if running a speed-heavy training plan. Bond early in summer camp for peak returns.
💪 Stamina Cards
Stamina cards with bond skills are critical for mid-game runs. 3 hearts by Turn 20 is the standard benchmark.
🎯 Power Cards
Power cards often have strong bond events with skill hints. Max bond before the final races for full skill benefit.
🧠 Wisdom Cards
Wisdom cards are often lower-priority for affinity — their main value comes from motivation recovery, not bond bonuses.
🍀 Friend Cards
Friend support cards (like Special Week, Vodka types) have unique bond event patterns — check their specific thresholds.
👥 Group Cards
Group cards appear multiple times per training session, naturally accelerating their affinity accumulation vs other types.
Affinity Banking Strategy
Advanced players use “affinity banking” — deliberately front-loading training sessions with specific support cards in the early-game turns (when stat multipliers are lower anyway) to reach bond milestones faster. This means your peak-efficiency late-game training turns benefit from maximum affinity bonuses. The Uma Musume affinity calculator above helps you determine exactly how many early sessions each card needs to hit your target milestone before your peak training window.
🥇Gold Resale Value Calculator
Managing resources in Uma Musume mirrors asset optimisation — calculate both game and real-world value precisely.
Character Headcanon Generator
Build deep headcanons for your favourite Uma Musume characters to enrich your bond event experience.
One Rep Max Calculator
Your Uma’s training is rooted in real athletic science — explore the physiology behind the stats.
Uma Musume Affinity FAQ: Advanced Tips
One common mistake is treating all joint training sessions as equal. The critical insight is that a training session where three support cards with bond skills are present is worth three times the affinity gain of a solo session — plus all three cards gain points simultaneously. Structuring your training choices to maximise group training presence for your target cards is the highest-leverage affinity optimisation available outside of card selection itself.
Another overlooked factor is the motivation system’s interaction with affinity gain. Training while at Good or Perfect motivation applies stat multipliers, but affinity gain itself is not affected by motivation level — meaning even a low-motivation turn where you choose training purely for affinity accumulation delivers full affinity value. Use this to your advantage during down turns.