Shin Megami Tensei 3 Fusion Calculator

Demon Fusion Calculator

Select two demons to see their potential fusion results in Shin Megami Tensei 3: Nocturne. The calculator considers race compatibility and level influences to predict the outcome.

Fusion Data Table

A sample of common demon fusions and their results.

Sample Demon Fusions

Demon 1	Demon 2	Result Demon	Result Level	Result Race
Jack Frost	Pixie	Sarasvati	16	Flood
Angel	Fallen	Gargoyle	12	Vermin
Naga	Karasu Tengu	Ose	25	Dragon
Oni	Arahabaki	Rakshasa	30	Vermin
Pyro Jack	Decarabia	Gargoyle	12	Vermin
Valkyrie	Odin	Thor	75	Thunder
Fafnir	Demi-fiend	Beelzebub	99	Fiend

Fusion Element Distribution

Visualizing the elemental distribution of potential fusion outcomes based on demon levels.

What is a Shin Megami Tensei 3 Fusion Calculator?

A Shin Megami Tensei 3: Nocturne Fusion Calculator is a specialized tool designed to help players predict the outcome of combining two demons in the game to create a new, more powerful demon. The fusion system in SMT3 is a cornerstone of its gameplay, allowing for strategic customization of your demon party. This calculator simplifies the complex mechanics of fusion by providing quick, accurate results based on user-defined inputs.

Who should use it? Any player of Shin Megami Tensei 3: Nocturne who wants to:

• Efficiently create demons with desired skills, resistances, or stats.
• Understand the underlying fusion mechanics without extensive trial and error.
• Plan their demon recruitment and fusion progression throughout the game.
• Optimize their party for challenging boss fights or specific gameplay challenges.

Common misconceptions about SMT3 fusion:

• Randomness: Many believe fusion results are purely random. While there’s an element of RNG in skill inheritance, the resulting demon and its base level are deterministic based on the parents’ types and levels.
• No Planning Needed: Some players might think they can just fuse any two demons and get a decent result. However, strategic fusion is crucial for accessing the best demons and skills, especially on higher difficulties.
• Level is Everything: While a demon’s level is a significant factor, its race and specific type also heavily influence the fusion outcome. A higher-level demon fused with a completely incompatible race might yield a surprisingly weak result.

Shin Megami Tensei 3 Fusion Formula and Mathematical Explanation

The core of demon fusion in Shin Megami Tensei 3: Nocturne relies on specific algorithms that determine the resulting demon’s type, level, and potential skills. The calculator simplifies this by focusing on the predictable aspects.

Base Fusion Level Calculation

The fundamental formula for determining the base level of a fused demon is as follows:

Result Level = floor(((Level Demon 1 + Level Demon 2) / 2) * Fusion Multiplier)

Where:

• Level Demon 1 and Level Demon 2 are the current levels of the two demons being fused.
• Fusion Multiplier is a factor that varies. In SMT3, this multiplier is influenced by factors like the relative levels of the parent demons and potentially the specific demon races involved. For simplicity in general calculators, a base multiplier around 1.1 is often used, but the actual game logic is more nuanced and can dynamically adjust this value.
• floor() indicates that any decimal portion of the result is discarded, rounding down to the nearest whole number.

Race and Element Determination

The resulting demon’s race and its inherent elemental alignment are determined by a complex lookup table. Essentially, certain combinations of demon races and their respective level ranges will always result in a specific demon of a particular race. For example, fusing a Fire-aligned demon with a Wind-aligned demon might result in a Thunder-aligned demon, depending on their types and levels.

Our calculator simplifies this by using a known database of SMT3 fusions. When you input two demons, it cross-references them against this database to find the most probable outcome based on their types and levels, especially if the resultant demon has a level close to the calculated base level.

Variables Table

Fusion Variables

Variable	Meaning	Unit	Typical Range
Demon 1 Name	The specific demon chosen as the first parent.	Text	Any demon in SMT3
Demon 2 Name	The specific demon chosen as the second parent.	Text	Any demon in SMT3
Demon 1 Level	The current level of the first parent demon.	Integer	1 – 99
Demon 2 Level	The current level of the second parent demon.	Integer	1 – 99
Result Demon Name	The demon produced by the fusion.	Text	Any demon in SMT3
Result Level	The base level of the resulting demon.	Integer	1 – 99
Result Race	The classification of the resulting demon (e.g., Fairy, Dragon, Fiend).	Text	Specific SMT3 Races
Fusion Multiplier	A dynamic factor influencing the resulting demon’s level.	Decimal	Varies (e.g., ~1.1 base)

Practical Examples of SMT3 Fusion

Understanding how the calculator works in practice is key to mastering demon fusion in Shin Megami Tensei 3.

Example 1: Creating a Useful Support Demon

Goal: Fuse a demon with useful support skills like Media (healing) and potentially Bufu for elemental coverage.

Inputs:

• Demon 1: Pixie (Level 5, Race: Fairy)
• Demon 2: Jack Frost (Level 9, Race: Ice)
• Fusion Type: Normal

Calculator Output:

• Primary Result: Sarasvati
• Intermediate Values:
• Base Level: 12
• Race: Flood
• Element: Water

Interpretation: Fusing a low-level Pixie with a mid-level Jack Frost typically results in Sarasvati, a Water-element demon of the Flood race. Sarasvati’s base level is around 12, which aligns well with the calculated base level for this combination. Sarasvati is known for learning healing skills like Media, making it a valuable early-to-mid game support demon.

Example 2: Aiming for a Powerful Offensive Demon

Goal: Fuse a strong offensive demon with high Strength and potential physical skills.

Inputs:

• Demon 1: Oni (Level 28, Race: Brute)
• Demon 2: Arahabaki (Level 25, Race: Earth)
• Fusion Type: Normal

Calculator Output:

• Primary Result: Rakshasa
• Intermediate Values:
• Base Level: 29
• Race: Vermin
• Element: Physical

Interpretation: Combining Oni and Arahabaki, both of whom have strong physical leanings, results in Rakshasa. This demon belongs to the Vermin race and has a base level around 29. Rakshasa is known for its high Strength stat and access to powerful physical skills, making it a good offensive choice.

How to Use This Shin Megami Tensei 3 Fusion Calculator

Mastering demon fusion in SMT3 is significantly easier with a reliable calculator. Follow these steps to get the most out of this tool:

1. Identify Parent Demons: Determine which two demons you wish to fuse. Consider their current levels, races, and the skills you want the resulting demon to inherit.
2. Input Demon Names: Type the exact names of your chosen demons into the “Demon 1” and “Demon 2” fields. The calculator uses a database, so accurate names are important.
3. Enter Levels: Input the current levels of both Demon 1 and Demon 2. Ensure these are within the valid range of 1 to 99.
4. Select Fusion Type: Choose between “Normal Fusion” (combining Demon 1 + Demon 2) or “Reverse Fusion” (conceptually subtracting Demon 2’s properties from Demon 1’s, often leading to different outcomes or failed fusions in some contexts). For most purposes, “Normal Fusion” is what you’ll use.
5. Calculate: Click the “Calculate Fusion” button.

How to Read Results:

• Primary Result: This is the name of the demon you will most likely obtain from the fusion.
• Intermediate Values:
  • Base Level: The calculated level of the resulting demon. This is a crucial indicator of its power.
  • Race: The racial category the resulting demon belongs to. Race determines overall stat growth trends and potential skill affinities.
  • Element: The primary elemental affinity of the resulting demon. This influences its innate strengths and weaknesses.
• Formula Explanation: Provides a simplified overview of how the base level is calculated.

Decision-Making Guidance:

Use the results to guide your fusion choices:

• Skill Planning: Check if the resulting demon can learn skills you need. Some demons have unique skill sets.
• Party Optimization: Does the fused demon fit your current party composition and strategy?
• Level Progression: Ensure the resulting demon’s level is appropriate for your current game progression. Higher-level demons can be fused later in the game for better results.
• Targeting Specific Demons: If you’re aiming for a specific powerful demon, use the calculator to identify the correct parent combinations and levels.

Don’t forget to use the Reset button to clear the fields and start a new calculation, and the Copy Results button to save your findings.

Key Factors That Affect Shin Megami Tensei 3 Fusion Results

While the calculator simplifies the process, several in-game factors can influence fusion outcomes or your strategic decisions surrounding them. Understanding these is crucial for advanced play:

1. Demon Races: The compatibility between the races of the two parent demons is paramount. Certain race combinations are more likely to produce specific results or might even be incompatible, leading to special outcomes or failures. The calculator relies on a database of these race-based results.
2. Relative Demon Levels: The difference in level between the two parent demons is a key factor. If one demon is significantly higher level than the other, it can influence the resulting demon type and its level, sometimes leading to unexpected outcomes or promoting the higher-level demon’s “lineage.”
3. Fusion Multiplier Variations: As mentioned in the formula, the multiplier isn’t always static. Factors like whether the fusion resulted in a demon of a higher or lower level than expected can subtly alter the multiplier for subsequent fusions, creating a dynamic system.
4. Skill Inheritance: While the calculator focuses on the resulting demon’s identity and level, the skills inherited are also critical. Players must choose which skills from the parents the resulting demon will learn. This often involves managing a limited number of skill slots and prioritizing crucial abilities.
5. Special Fusion Requirements: Some of the most powerful demons in SMT3 (like Beelzebub or Lucifer) cannot be obtained through standard two-demon fusion. They require “Special Fusion,” often involving specific combinations of three or more demons, unique sacrifices, or defeating specific bosses. This calculator primarily covers standard two-demon fusions.
6. Player Level & Progress: While not directly in the fusion formula, your own progress through the game and the level of your protagonist (the Demi-Fiend) influence the overall strength and availability of demons. Certain demons may only appear or be fusions of demons accessible at specific points in the story.
7. Demon Negotiation & Birthstones: Acquiring the right demons to fuse is often the first challenge. Successful negotiations with demons in the field or using specific “Birthstones” (items that summon a specific demon) are prerequisites for performing certain fusions.

Frequently Asked Questions (FAQ)

What is the difference between Normal and Reverse Fusion in SMT3?

Normal Fusion combines two demons (M1 + M2) to create a new one. Reverse Fusion is a more complex mechanic, sometimes described as M1 – M2, which can yield different results or specific outcomes not achievable through normal fusion. It’s less commonly used for general fusion planning and often results in specific, sometimes niche, demons or failures. This calculator primarily models Normal Fusion outcomes.

Can I fuse any two demons together?

You can attempt to fuse any two compatible demons. However, certain race combinations are incompatible and may result in a “failed” fusion, yielding a specific low-level demon like a Higharchy or Foul. The calculator predicts successful fusions based on known combinations.

How does the Demi-Fiend’s level affect fusion?

The Demi-Fiend’s level primarily influences your ability to recruit higher-level demons and your overall combat strength. While it doesn’t directly change the fusion formula for the resulting demon’s level, it impacts which parent demons are available to you and their effectiveness.

What are “Special Fusions” in Shin Megami Tensei 3?

Special Fusions are unique recipes that create specific, often very powerful demons (like Lucifer, Beelzebub, Metatron). These require precise combinations of three or more demons and cannot be achieved through standard two-demon fusion. This calculator does not handle Special Fusions.

Can I inherit specific skills from the parent demons?

Yes, skill inheritance is a major part of SMT3 fusion. When fusing, you are usually presented with a choice of skills from the parent demons to pass onto the new one. The calculator focuses on the resulting demon’s identity and level, not specific skill inheritance choices.

What happens if the calculator shows a demon I don’t have in my compendium or encountered yet?

This means the calculated result is a demon that exists in the game’s data but hasn’t been met or registered by you yet. You’ll need to continue playing, recruiting, or fusing to encounter or summon it.

Does the order of demons matter in fusion?

For Normal Fusion (M1 + M2), the order generally does not affect the resulting demon’s identity or base level, only potentially the pool of skills available for inheritance. However, Reverse Fusion is order-dependent.

Are there any limits to how many demons I can fuse?

You can only hold a limited number of demons in your active party and reserves (around 12 slots initially). Each fusion consumes two demons, so you need to manage your roster carefully. There’s no hard limit on the number of fusions you can perform over the course of the game, only on simultaneous party size.