Advanced P5R Fusion Calculator | Persona 5 Royal Guide

P5R Fusion Calculator

An expert tool to calculate Persona fusions in Persona 5 Royal.

Fusion Calculator

Parent Persona 1

Select the first Persona to fuse.

Parent Persona 2

Select the second Persona to fuse.

Fusion Result

—

Select two Personas to see the fusion result.

Level Comparison Chart

What is a P5R Fusion Calculator?

A P5R fusion calculator is an essential tool for players of Persona 5 Royal. Fusion is the core mechanic in the Velvet Room where you combine two or more Personas to create a new, often more powerful, one. This calculator helps you predict the outcome of a “dyad” or normal fusion between two Personas, saving you time and in-game money. It removes the guesswork and allows for strategic planning to fill your Compendium and build the perfect team. The fusion process is not random; it follows a specific set of rules based on the Arcana and base levels of the parent Personas.

The P5R Fusion Formula and Explanation

Normal fusion in Persona 5 Royal follows a predictable, two-step formula. Understanding this is key to mastering the fusion calculator p5r system.

Determine Resulting Arcana: Every combination of two different Arcanas results in a specific third Arcana. For example, fusing a Magician Persona with a Priestess Persona will always result in a Hierophant Persona. Fusing two Personas of the same Arcana results in a lower-ranked Persona of that same Arcana.
Calculate Resulting Persona: The game calculates the average of the two parent Personas’ base levels, adds 1, and rounds down. Then, it finds the Persona in the resulting Arcana with the closest base level that is *equal to or higher than* this calculated number.

The formula can be stated as:

Target Level = Floor( (Base Level of Persona 1 + Base Level of Persona 2) / 2 ) + 1

Variables Table

Variable	Meaning	Unit	Typical Range
Parent Persona 1/2	The two Personas you are combining.	Name / Arcana	Any from Compendium
Base Level	The default starting level of a Persona.	Level	1 – 99
Resulting Arcana	The Arcana of the new Persona, determined by a fixed chart.	Arcana	Any of the 20+ Arcanas
Target Level	The calculated level used to find the resulting Persona.	Level	2 – 99

Practical Examples

Here are two examples demonstrating how the fusion calculator p5r logic works in practice.

Example 1: Arsene + Pixie

Inputs: Arsene (Fool, Lv 1) + Pixie (Lovers, Lv 2)
Units: Fool Arcana and Lovers Arcana combine to create the Chariot Arcana.
Calculation: Target Level = Floor((1 + 2) / 2) + 1 = Floor(1.5) + 1 = 1 + 1 = 2.
Result: The game looks for a Chariot Persona at or above Level 2. The first one it finds is Agathion (Base Level 3). Thus, the result is Agathion.

Example 2: Jack-o’-Lantern + Berith

Inputs: Jack-o’-Lantern (Magician, Lv 2) + Berith (Hierophant, Lv 9)
Units: Magician Arcana and Hierophant Arcana combine to create the Temperance Arcana.
Calculation: Target Level = Floor((2 + 9) / 2) + 1 = Floor(5.5) + 1 = 5 + 1 = 6.
Result: The game looks for a Temperance Persona at or above Level 6. The first one it finds is Genbu (Base Level 7). Thus, the result is Genbu.

How to Use This P5R Fusion Calculator

Using this calculator is straightforward. Follow these steps for perfect fusions:

Select Parent Persona 1: Use the first dropdown menu to choose the first Persona you wish to fuse.
Select Parent Persona 2: Use the second dropdown menu to select the second Persona.
View the Result: The calculator will automatically update. The “Fusion Result” box will show the name of the new Persona, its level, and its Arcana.
Analyze Details: The details section explains the calculation, showing the resulting Arcana and the target level that was used.
Reset: Click the “Reset” button to clear the selections and start a new calculation. For help planning your journey, you can consult a 100% perfect schedule guide to know which confidants to prioritize.

Key Factors That Affect P5R Fusion

While this calculator handles normal fusions, several other factors can influence your results in the Velvet Room.

Special Fusions: Some powerful Personas can only be created through specific, fixed recipes, sometimes involving three or more Personas. These ignore the normal fusion rules.
Treasure Demons: Fusing with a Treasure Demon is a special case. It will upgrade or downgrade a Persona within its own Arcana, rather than changing the Arcana. The outcome depends on the specific Treasure Demon used.
Fusion Accidents: Very rarely, a fusion will fail and result in a random Persona, often with a strange set of skills. The chance of this increases during a Fusion Alarm.
Fusion Alarms: A new mechanic in Persona 5 Royal, Fusion Alarms strengthen the resulting Persona. Fusing during an alarm yields a Persona with bonus stats and a potentially mutated skill. However, subsequent fusions during the same alarm have a high chance of being an accident.
DLC Personas: If you have downloaded DLC Personas, they are added to the fusion pool. This can alter the results of your fusions, as a DLC Persona might become the closest-leveled result. This is a common source of confusion for players using a standard P5R fusion guide.
Player Level: You cannot fuse a Persona that has a higher base level than your current protagonist level. The calculator will show the result, but the game will not allow the fusion until you level up.

Frequently Asked Questions (FAQ)

Why did I get a different result than the fusion calculator p5r showed?: The most common reason is owning DLC Personas. They are included in the fusion pool and can change the outcome. Make sure any calculator you use has an option to include or exclude DLCs for accurate results. Another reason could be a special fusion overriding the normal one.
Does the current level of my Personas matter?: For normal fusions, no. The calculation is always based on the Persona’s default, base level, not its current level.
What happens when I fuse two Personas of the same Arcana?: This is a “rank-down” fusion. The result is the next-lowest-ranked Persona of the same Arcana. For example, fusing two Fool Personas will result in a weaker Fool Persona.
Can I fuse any two Personas?: Mostly, yes. The main restriction is that you cannot fuse a Persona whose base level is higher than your own. Also, some specific combinations may not have a valid result, which this calculator will indicate.
What is the best way to get a specific Persona?: Use a “reverse fusion” calculator or list. These tools, often found in a complete Persona compendium list, allow you to select the Persona you want and will show you all the possible combinations to create it.
How do I pass on specific skills?: Skill inheritance is a complex system based on the Persona’s inheritance type (e.g., Fire, Ice, Physical). Personas cannot inherit skills they are incompatible with. During fusion, you can select which inheritable skills to pass down. Using a guide to creating a perfect Persona can help with this.
What’s the point of a Fusion Alarm?: It’s a high-risk, high-reward system. The first fusion during an alarm creates a much stronger Persona. You can also itemize Personas for powerful skill cards or equipment. It’s a key feature for late-game optimization.
Where can I find all the Personas?: Personas can be captured in Palaces and Mementos, or fused in the Velvet Room. Completing the full Persona 5 list is a major goal for many players and requires extensive fusion.