Uma Musume Legacy Calculator

Estimate the initial stat bonuses from inheritance for your next champion.

Parent Stats

Enter the base stats of the two parents. These stats directly influence the initial bonus your new Uma Musume will receive.

Parent 1

Parent 2

Inheritance Factors & Compatibility

What is the Uma Musume Legacy Calculator?

The Uma Musume Legacy Calculator is an essential tool for any trainer aiming to breed top-tier champions in Uma Musume: Pretty Derby. The “Legacy” or “Inheritance” system is a core mechanic where a new Uma Musume inherits stats and skills from her two parents and four grandparents. This calculator helps you predict the initial stat bonuses your new character will receive, allowing you to make smarter breeding choices.

Instead of relying on guesswork, you can input the stats of potential parents, their compatibility, and the quality of their “Blue Factors” (stat factors) to see a clear estimate of your starting advantage. This is crucial for optimizing training, as a strong start can be the difference between a good Uma and a legendary one.

Uma Musume Inheritance Formula and Explanation

The total starting bonus is a combination of two primary components: the stats passed down from parents (influenced by compatibility) and the flat bonuses from Blue Factors.

The simplified formula used by this calculator is:

Total Bonus = (Parent Bonus * Compatibility Multiplier) + Blue Factor Bonus

Variables Table

Variable	Meaning	Unit	Typical Range
Parent Stats	The base Speed, Stamina, Power, Guts, or Intelligence of each parent.	Stat Points	300 – 1200+
Compatibility Multiplier	A multiplier based on the relationship between the two parents. Higher is better.	Multiplier (unitless)	0.9x – 1.15x
Blue Factor Stars	The total star rating (1-3 stars each) of a specific stat factor from all six ancestors.	Stars (unitless)	0 – 18

This uma musume legacy calculator helps quantify these variables for clear planning.

Practical Examples

Example 1: High-Tier Breeding

Imagine you have two excellent parents with high stats and great factors.

• Inputs:
  • Parent 1 Speed: 1200
  • Parent 2 Speed: 1150
  • Compatibility: Double Circle (◎)
  • Total Speed Blue Factor Stars: 12
• Results:
  • Parent Bonus: ~129 points
  • Blue Factor Bonus: +84 points
  • Total Initial Speed Bonus: +213 points

This massive head start makes reaching S-rank stats much more achievable.

Example 2: Budget Breeding

Here’s a more modest setup with less-optimized parents.

• Inputs:
  • Parent 1 Speed: 800
  • Parent 2 Speed: 750
  • Compatibility: Triangle (△)
  • Total Speed Blue Factor Stars: 4
• Results:
  • Parent Bonus: ~78 points
  • Blue Factor Bonus: +28 points
  • Total Initial Speed Bonus: +106 points

While not as explosive, this is still a significant advantage that demonstrates the power of a solid uma musume inheritance guide.

How to Use This Uma Musume Legacy Calculator

1. Enter Parent Stats: Input the five base stats for both Parent 1 and Parent 2. Use the stats from their completed training reports.
2. Set Compatibility: Choose the compatibility rating between the two parents (Double Circle, Circle, Triangle, or Cross). This is shown on the parent selection screen in-game.
3. Sum Blue Factor Stars: For the single stat you are targeting, add up the total number of stars from all six ancestors in the inheritance tree. For instance, if you’re calculating for Speed, sum up all the Speed factor stars.
4. Review Results: The calculator instantly shows the total bonus for your target stat, breaking it down into the bonus from parents and the bonus from factors. The chart provides a visual comparison of these sources.
5. Plan Your Breeding: Use these insights to decide which parents to pair. A parent with slightly lower stats but better factors and compatibility might be a superior choice. Check out our guide on finding the best parents for breeding uma musume.

Key Factors That Affect Uma Musume Inheritance

• Parent Compatibility: Arguably the most important factor. Double Circle (◎) provides a significant boost to the stats inherited from parents.
• Parent Base Stats: Higher parent stats lead to a higher base inheritance. A small percentage of their stats is passed down.
• Blue Factors (Inshi): These provide large, flat stat bonuses. A 3-star factor is significantly more powerful than a 1-star factor.
• Grandparent Factors: While the calculator simplifies this, the factors of the four grandparents are critical as they are the source of the parents’ factors. A good parent is often the result of well-bred grandparents.
• Number of Factors: The more ancestors in the lineage with a specific blue factor, the higher the total star count and the bigger the bonus.
• “Hidden” Values: The game also considers shared G1 race wins and character-specific affinities, which can further boost compatibility. This is an advanced topic covered in many uma musume inheritance guides.

Frequently Asked Questions (FAQ)

1. What is the most important part of inheritance?

Compatibility and high-star Blue Factors are the two most critical elements. Excellent compatibility (◎) maximizes the stats you get from parents, while 3-star blue factors provide the largest flat bonuses.

2. How do I get 3-star blue factors?

You need to finish a training run with a stat of at least 600, but for the best chances (around 10%), you should aim for 1100+ in that stat.

3. Does it matter which parent has the better stats?

No, the formula typically combines the stats from both parents, so their individual placement doesn’t matter, only their combined total and their compatibility.

4. What does the “Total Blue Factor Stars” input mean?

It’s the sum of all stars for a single stat (like Speed) across all six ancestors (2 parents + 4 grandparents). For example, if Parent 1 has a 3-star Speed factor, Parent 2 has a 2-star, and one grandparent has a 1-star, the total is 3 + 2 + 1 = 6.

5. Why is my in-game bonus different from the calculator?

This calculator uses a well-established community formula. However, the exact game mechanics are not public and can have minor hidden variables (like G1 race wins) that cause slight variations. Think of this as a very accurate estimation tool.

6. Can a character be their own grandparent?

Yes. In Uma Musume’s inheritance, a character cannot be their own parent, but they can appear as a grandparent in their own inheritance tree, which is a common strategy in “inheritance loops”.

7. What’s the difference between Blue, Pink, Green, and White factors?

Blue factors grant flat stat bonuses (Speed, Stamina, etc.). Pink factors improve aptitudes (e.g., Turf, Long Distance). Green factors pass down unique skills. White factors pass down normal skills or grant stats from specific race wins. This calculator focuses on the impact of Blue factors.

8. How does the uma musume legacy calculator help with strategy?

It allows you to compare different breeding pairs before committing resources. You might find that a pair with “Good” compatibility but amazing 9-star factors gives a better starting bonus than an “Excellent” pair with weak 2-star factors. Planning is key! A good uma musume inshi factor calculator is invaluable.

Related Tools and Internal Resources

To further optimize your training, explore these other resources: