Pokémon Type Effectiveness Calculator

Understand the intricate relationships between Pokémon types to gain a strategic advantage in battle.

Calculate Type Matchups

Type Effectiveness Chart

Attacking Type	Vs. Normal	Vs. Fire	Vs. Water	Vs. Grass	Vs. Electric	Vs. Ice	Vs. Fighting	Vs. Poison	Vs. Ground	Vs. Flying	Vs. Psychic	Vs. Bug	Vs. Rock	Vs. Ghost	Vs. Dragon	Vs. Steel	Vs. Dark	Vs. Fairy

What is Pokémon Type Effectiveness?

Pokémon type effectiveness is a fundamental mechanic in the Pokémon universe that dictates how much damage an attack of a certain type will deal to a Pokémon of another type. Every Pokémon and every move in the game possesses one or two types. When a move’s type interacts with a defending Pokémon’s type(s), an effectiveness modifier is applied. This modifier determines if the attack is “Super Effective” (dealing double damage), “Not Very Effective” (dealing half damage), “Immune” (dealing no damage), or “Normally Effective” (dealing standard damage).

Understanding these interactions is crucial for any aspiring Pokémon Trainer aiming to win battles, from casual play to competitive formats. Coaches and players use this knowledge to build balanced teams, select the right moves for their Pokémon, and predict their opponents’ strategies. It adds a deep layer of strategy, making battles more engaging and dynamic.

A common misconception is that effectiveness is solely based on the attacker’s type. In reality, it’s the interaction *between* the attacking move’s type and the defending Pokémon’s type(s) that matters. For instance, a Fire-type move is Super Effective against Grass-type Pokémon, but it’s Not Very Effective against Water-type Pokémon. Furthermore, dual-type Pokémon require considering both of their types, as a single move can interact differently with each.

This calculator is designed for all Pokémon fans, from beginners learning the ropes to seasoned veterans looking for a quick reference. It helps demystify the complex web of type matchups, enabling strategic decision-making. Whether you’re playing the video games, battling in Pokémon GO, or enjoying the Trading Card Game, grasping type effectiveness is key.

Pokémon Type Effectiveness Formula and Mathematical Explanation

The core of Pokémon type effectiveness lies in a set of predefined multipliers based on the interaction between attacking and defending types. The formula isn’t a complex algebraic equation in the traditional sense, but rather a lookup system governed by specific rules.

Here’s how it works:

1. Identify the Attacking Move’s Type: This is the type of the move the player is using (e.g., Fire, Water, Grass).
2. Identify the Defending Pokémon’s Type(s): This is the primary type and, if applicable, the secondary type of the Pokémon being targeted.
3. Determine the Modifier for Each Type Interaction: For each of the defending Pokémon’s types, determine the damage multiplier against the attacking move’s type. The standard multipliers are:
   • 2x (Super Effective): The attacking move’s type is strong against the defending Pokémon’s type.
   • 0.5x (Not Very Effective): The attacking move’s type is weak against the defending Pokémon’s type.
   • 0x (Immune): The attacking move’s type has no effect on the defending Pokémon’s type.
   • 1x (Normally Effective): No special advantage or disadvantage.
4. Calculate the Total Multiplier:
   • Single-Type Pokémon: The multiplier is directly determined by the interaction between the attacking move’s type and the single defending type.
   • Dual-Type Pokémon: The multipliers for each of the defending Pokémon’s types are multiplied together. For example, if a Fire-type move hits a Water/Flying Pokémon:
     • Fire vs. Water = 0.5x
     • Fire vs. Flying = 1x
     • Total Multiplier = 0.5x * 1x = 0.5x (Not Very Effective)

     If a Rock-type move hits a Flying/Bug Pokémon:

     • Rock vs. Flying = 0.5x
     • Rock vs. Bug = 2x
     • Total Multiplier = 0.5x * 2x = 1x (Normally Effective)

     If a Ground-type move hits a Flying/Rock Pokémon:

     • Ground vs. Flying = 0x (Immune)
     • Ground vs. Rock = 2x
     • Total Multiplier = 0x * 2x = 0x (Immune)

Variables Table

Type Effectiveness Variables

Variable	Meaning	Unit	Typical Range
ATK_Type	Type of the attacking move.	Categorical (e.g., Fire, Water)	Normal, Fire, Water, Grass, Electric, Ice, Fighting, Poison, Ground, Flying, Psychic, Bug, Rock, Ghost, Dragon, Steel, Dark, Fairy
DEF_Type1	Primary type of the defending Pokémon.	Categorical (e.g., Fire, Water)	Normal, Fire, Water, Grass, Electric, Ice, Fighting, Poison, Ground, Flying, Psychic, Bug, Rock, Ghost, Dragon, Steel, Dark, Fairy
DEF_Type2	Secondary type of the defending Pokémon (optional).	Categorical (e.g., Fire, Water) or None	Normal, Fire, Water, Grass, Electric, Ice, Fighting, Poison, Ground, Flying, Psychic, Bug, Rock, Ghost, Dragon, Steel, Dark, Fairy, None
Modifier_1	Damage multiplier based on ATK_Type vs. DEF_Type1.	Decimal (e.g., 2.0, 0.5, 0.0, 1.0)	0, 0.5, 1.0, 2.0
Modifier_2	Damage multiplier based on ATK_Type vs. DEF_Type2 (if applicable).	Decimal (e.g., 2.0, 0.5, 0.0, 1.0)	0, 0.5, 1.0, 2.0, N/A (if no secondary type)
Total_Multiplier	Final damage multiplier (Modifier_1 * Modifier_2).	Decimal (e.g., 2.0, 0.5, 0.0, 1.0)	0, 0.5, 1.0, 2.0, 4.0

The Pokémon Type Effectiveness Calculator above simplifies this process by performing these calculations instantly. The main result shows the final multiplier, while intermediate values break down the effectiveness against each of the defending Pokémon’s types.

Practical Examples (Real-World Use Cases)

Example 1: Pikachu’s Thunderbolt vs. a Charizard

Scenario: A player wants to know how effective Pikachu’s Electric-type move “Thunderbolt” would be against a Charizard.

Inputs:

• Attacking Type: Electric
• Defending Type 1: Fire
• Defending Type 2: Flying (Optional)

Calculation:

• Electric vs. Fire: 2x (Super Effective)
• Electric vs. Flying: 1x (Normally Effective)
• Total Multiplier: 2x * 1x = 2x

Result: Thunderbolt is Super Effective against Charizard, dealing double damage.

Interpretation: This is a favorable matchup for Pikachu. An Electric-type move is the best choice offensively against Charizard.

Example 2: Garchomp’s Earthquake vs. a Dragonite

Scenario: A player is considering using Garchomp’s Ground-type move “Earthquake” against an opponent’s Dragonite.

Inputs:

• Attacking Type: Ground
• Defending Type 1: Dragon
• Defending Type 2: Flying (Optional)

Calculation:

• Ground vs. Dragon: 1x (Normally Effective)
• Ground vs. Flying: 0x (Immune)
• Total Multiplier: 1x * 0x = 0x

Result: Earthquake is Immune to Dragonite, dealing no damage.

Interpretation: This is an extremely unfavorable matchup. Using Earthquake against Dragonite would be a critical mistake. The player should switch to a different attacking type, such as Ice or Fairy, which are Super Effective against Dragonite.

Example 3: Sylveon’s Moonblast vs. a Gengar

Scenario: A player wants to know the effectiveness of Sylveon’s Fairy-type move “Moonblast” against a Gengar.

Inputs:

• Attacking Type: Fairy
• Defending Type 1: Ghost
• Defending Type 2: Poison (Optional)

Calculation:

• Fairy vs. Ghost: 1x (Normally Effective)
• Fairy vs. Poison: 2x (Super Effective)
• Total Multiplier: 1x * 2x = 2x

Result: Moonblast is Super Effective against Gengar, dealing double damage.

Interpretation: This is a strong offensive position for Sylveon. Fairy-type moves are highly effective against Gengar due to its Poison typing.

How to Use This Pokémon Type Effectiveness Calculator

Our Pokémon Type Effectiveness Calculator is designed for ease of use, providing instant insights into battle matchups. Follow these simple steps:

1. Select the Attacking Type: Use the first dropdown menu labeled “Attacking Type” to choose the type of the move your Pokémon will use.
2. Select the Defending Pokémon’s Primary Type: In the “Defending Type” dropdown, select the main type of the Pokémon you are targeting.
3. Select the Defending Pokémon’s Secondary Type (if applicable): If the opposing Pokémon has a second type, choose it from the “Secondary Defending Type (Optional)” dropdown. If it only has one type, leave this as “– None –“.
4. Calculate: Click the “Calculate Effectiveness” button.

Reading the Results:

• Primary Highlighted Result: This displays the overall effectiveness modifier (e.g., “Super Effective (2x)”, “Not Very Effective (0.5x)”, “Immune (0x)”, “Normally Effective (1x)”). This is the most crucial piece of information for quick decision-making.
• Intermediate Values: Below the primary result, you’ll see the effectiveness breakdown against each of the defending Pokémon’s types. This helps understand *why* the overall result is what it is, especially for dual-type Pokémon.
• Formula Explanation: A brief text explains the basic calculation process.

Decision-Making Guidance:

• Super Effective (2x or 4x): Aim to use these moves for maximum damage output.
• Normally Effective (1x): A standard damage output. Useful if no super effective options exist.
• Not Very Effective (0.5x or 0.25x): Avoid using these moves if possible, as they deal reduced damage.
• Immune (0x): Never use these moves against a Pokémon immune to them, as they will inflict no damage and waste a turn.

Use the “Reset” button to clear the fields and start a new calculation.

Key Factors That Affect Pokémon Type Effectiveness Results

While the core type matchups are fixed, several factors in Pokémon battles can influence how these effectiveness multipliers are applied or perceived:

1. Attacking Move’s Type: This is the primary input. A Fire-type move interacts differently than a Water-type move, regardless of the Pokémon using it.
2. Defending Pokémon’s Type(s): As discussed, the defending Pokémon’s type(s) are the other half of the effectiveness equation. Dual-typing creates complex interactions.
3. Abilities: Many Pokémon have Abilities that can alter type interactions. For example, Levitate makes Flying-type Pokémon immune to Ground-type moves, even if their typing would normally make them weak or neutral. Wonder Guard, possessed by Shedinja, makes it only vulnerable to Super Effective hits.
4. Items: Held items can modify damage or type effectiveness. For instance, an item like a Ring Target makes the holder take neutral damage even from moves that would normally be ineffective or immune. A Heavy-Duty Boots item prevents damage from entry hazards like Stealth Rock, which normally inflict damage based on type effectiveness (Super Effective hits do 4x damage).
5. STAB (Same-Type Attack Bonus): While not directly altering the effectiveness multiplier (2x, 0.5x, 0x), STAB grants a 50% damage boost when a Pokémon uses a move that matches one of its own types. This stacks *multiplicatively* with type effectiveness, meaning a Super Effective STAB move deals 1.5x * 2x = 3x damage.
6. Status Conditions and Stat Changes: Critical hits ignore defensive stat changes and negative effectiveness modifiers (though they still benefit from positive ones). Burn halves physical attack power, Freeze prevents moves, etc. While not directly changing the *type effectiveness number*, these conditions significantly impact the overall damage dealt and received.
7. Move-Specific Effects: Some moves have secondary effects or unique properties that might bypass standard type effectiveness rules in specific circumstances, although this is rare. For example, moves like “Nature Power” change their type based on the environment, potentially altering effectiveness.

A thorough understanding of these factors, in addition to basic type effectiveness, is essential for mastering Pokémon battles. Our calculator provides the foundational knowledge for type matchups.

Frequently Asked Questions (FAQ)

Q: What is the most effective type combination to attack with?

A: Offensively, there isn’t a single “most effective” type, as it depends entirely on the defending Pokémon’s types. However, types like Ground, Fighting, Fire, Water, and Electric are generally strong because they hit a wide variety of common types super effectively. Offensively hitting a dual-type Pokémon with two weaknesses can result in 4x damage.

Q: What is the best defensive type combination?

A: Defensively, combinations that resist many common attacking types and have few weaknesses are ideal. For example, Steel/Fairy is excellent, resisting numerous types and only having two weaknesses (Ground and Fire) that are also resisted by other Pokémon. Ghost/Dark is another strong defensive typing, immune to both Psychic and Normal attacks, respectively, and having only one shared weakness (Fairy).

Q: How does a dual-type Pokémon interact with a single-type move?

A: The effectiveness is calculated by multiplying the effectiveness of the move against each of the defending Pokémon’s types. For example, a Water-type move against a Fire/Flying type would be 0.5x (vs. Fire) * 1x (vs. Flying) = 0.5x.

Q: Can a move be Super Effective against both types of a dual-type Pokémon?

A: Yes. If an attacking type is Super Effective against both of a dual-type Pokémon’s types, the total damage multiplier becomes 2x * 2x = 4x. For instance, an Ice-type move against a Dragon/Flying type Pokémon is Super Effective against both Dragon (2x) and Flying (2x), resulting in 4x damage.

Q: Are there any types that are immune to everything?

A: No single type is immune to all other types. However, certain type combinations create immunities. For example, a Ground/Flying type is immune to Ground moves (due to Flying type immunity) and Electric moves (due to Ground type immunity).

Q: Does the Pokémon’s level affect type effectiveness?

A: No, a Pokémon’s level does not affect the type effectiveness multiplier itself. Level primarily influences base stats, which determine the actual damage dealt and received after the effectiveness multiplier is applied.

Q: How are Normal-type moves handled?

A: Normal-type moves are typically only ineffective against Rock and Steel types (Not Very Effective), and immune to Ghost-types. They are generally not super effective against any type.

Q: What about moves that have multiple types, like dual-type attacks?

A: As of the current generation, there are no standard moves that possess multiple types simultaneously in the way Pokémon do. Moves have a single designated type. Therefore, you only need to consider the move’s single type against the defender’s types.

Q: How does the calculator handle the new Fairy type?

A: The calculator includes the Fairy type and its interactions. Fairy is Super Effective against Fighting and Dragon types, Not Very Effective against Fire, Poison, and Steel types, and immune to no types. It resists Bug, Dark, and Fighting types, and is weak to Poison and Steel types.