Picking the wrong move in a Pokémon battle can quickly turn a favorable matchup into a disadvantage. Type interactions become more complicated when two defensive types combine, especially when weaknesses, resistances, and immunities overlap.
This Pokémon type calculator helps you check the defensive effectiveness of any single-type or dual-type combination and see exactly which attacks deal 4×, 2×, 1×, ½×, ¼×, or 0× effectiveness.
Overview
The Pokémon type system determines whether an attacking move is super effective, resisted, neutral, or completely ineffective against the defending Pokémon. With 18 modern Pokémon types, checking every possible combination by memory can become difficult.
This type calculator handles both single and dual defensive types. Select the Pokémon's primary type and, when needed, its secondary type to generate a complete defensive profile.
Pokémon Type Calculator Features
Dual-Type Support
Many Pokémon have two types at once, and their final defensive matchup depends on both. Instead of checking two charts separately, the calculator automatically combines both multipliers and displays the final result.
4× Weakness Detection
When both defensive types are weak to the same attacking type, the weaknesses stack. Two 2× modifiers multiply into a 4× weakness, making that attack especially dangerous.
¼× Resistance Detection
The reverse can also happen. When both types resist the same attack, two 0.5× modifiers combine into a 0.25×, or ¼×, resistance.
Immunity Checker
Some type interactions deal no damage at all. For example, Ground attacks cannot normally affect Flying types, while Normal and Fighting attacks cannot normally affect Ghost types. The calculator groups these matchups clearly as 0× immunities.
Complete Defensive Profile
Results are grouped into weaknesses, resistances, immunities, and neutral matchups. This makes it easy to understand the entire defensive profile of the selected type combination at a glance.
How to Use the Pokémon Type Calculator
Step 1: Select the Primary Type
Choose the Pokémon's first defensive type from the Primary Type selector.
Step 2: Add a Secondary Type
If the Pokémon has two types, choose its second type from the Secondary Type selector. Leave this option empty when checking a single-type Pokémon.
Step 3: Calculate Type Effectiveness
Select Calculate Type Effectiveness to generate the complete defensive matchup. The calculator evaluates every attacking type against your selected defensive combination.
Step 4: Review the Multipliers
Check the 4× and 2× weakness groups first, then review ½× and ¼× resistances, immunities, and neutral attacks. These groups show exactly how incoming move types interact with the selected Pokémon typing.
Understanding Pokémon Type Matchups
How Damage Multipliers Work
Type effectiveness uses multipliers rather than adding or subtracting a fixed amount of damage. A super-effective matchup normally produces 2× effectiveness, a resisted matchup produces 0.5×, and an immunity produces 0×.
Dual-Type Math Explained
Dual defensive types multiply their modifiers together. For example, if a Water attack is 2× effective against the first type and 2× effective against the second, the final multiplier is 4×.
2 × 2 = 4× effectiveness
If one defensive type is weak at 2× while the other resists the same attack at 0.5×, the two effects cancel each other out.
2 × 0.5 = 1× effectiveness
What About STAB?
STAB means Same Type Attack Bonus. It is an offensive damage bonus applied when a Pokémon uses a move matching its own type. STAB is separate from the defensive type chart shown by this calculator, so it is not included in these defensive multiplier results.
Complete Pokémon Type Chart
The following tables provide a quick reference for all 18 modern Pokémon types.
Offensive Strengths by Type
| Attacking Type | Super Effective Against |
|---|---|
| Normal | None |
| Fire | Grass, Ice, Bug, Steel |
| Water | Fire, Ground, Rock |
| Electric | Water, Flying |
| Grass | Water, Ground, Rock |
| Ice | Grass, Ground, Flying, Dragon |
| Fighting | Normal, Ice, Rock, Dark, Steel |
| Poison | Grass, Fairy |
| Ground | Fire, Electric, Poison, Rock, Steel |
| Flying | Grass, Fighting, Bug |
| Psychic | Fighting, Poison |
| Bug | Grass, Psychic, Dark |
| Rock | Fire, Ice, Flying, Bug |
| Ghost | Ghost, Psychic |
| Dragon | Dragon |
| Dark | Ghost, Psychic |
| Steel | Ice, Rock, Fairy |
| Fairy | Fighting, Dragon, Dark |
Defensive Weaknesses and Resistances
| Type | Weak To | Resists | Immune To |
|---|---|---|---|
| Normal | Fighting | None | Ghost |
| Fire | Water, Ground, Rock | Fire, Grass, Ice, Bug, Steel, Fairy | None |
| Water | Electric, Grass | Fire, Water, Ice, Steel | None |
| Electric | Ground | Electric, Flying, Steel | None |
| Grass | Fire, Ice, Poison, Flying, Bug | Water, Electric, Grass, Ground | None |
| Ice | Fire, Fighting, Rock, Steel | Ice | None |
| Fighting | Flying, Psychic, Fairy | Bug, Rock, Dark | None |
| Poison | Ground, Psychic | Grass, Fighting, Poison, Bug, Fairy | None |
| Ground | Water, Grass, Ice | Poison, Rock | Electric |
| Flying | Electric, Ice, Rock | Grass, Fighting, Bug | Ground |
| Psychic | Bug, Ghost, Dark | Fighting, Psychic | None |
| Bug | Fire, Flying, Rock | Grass, Fighting, Ground | None |
| Rock | Water, Grass, Fighting, Ground, Steel | Normal, Fire, Poison, Flying | None |
| Ghost | Ghost, Dark | Poison, Bug | Normal, Fighting |
| Dragon | Ice, Dragon, Fairy | Fire, Water, Grass, Electric | None |
| Dark | Fighting, Bug, Fairy | Ghost, Dark | Psychic |
| Steel | Fire, Fighting, Ground | Normal, Grass, Ice, Flying, Psychic, Bug, Rock, Dragon, Steel, Fairy | Poison |
| Fairy | Poison, Steel | Fighting, Bug, Dark | Dragon |
Defensive Type Combinations
Dual typings can dramatically change a Pokémon's defensive profile. A type that covers another type's weakness can reduce a dangerous 2× matchup to neutral 1×, while overlapping resistances can create powerful ¼× matchups.
Steel/Fairy is a notable defensive combination because the two types provide a large number of resistances while leaving only a small number of standard weaknesses. However, defensive value in an actual battle also depends on stats, abilities, moves, items, and the opposing team.
Common Pokémon Type Calculator Questions
Why Is My 4× Weakness Not Showing?
Make sure both defensive types are selected. A 4× weakness only appears when the attacking type is 2× effective against both selected defensive types.
Why Did a Weakness Become Neutral?
One type can resist an attack that the other type is weak to. In that situation, 2× and 0.5× multiply together and produce a neutral 1× result.
Can Abilities Change These Results?
Yes. Abilities can sometimes override the base type chart. For example, certain abilities grant immunities to specific move types. This calculator displays base type effectiveness and does not currently apply ability-specific effects.
How Do I Check a Tera Type?
For defensive type effectiveness after Terastallization, select the Pokémon's Tera Type as the primary type and leave the secondary type empty. This gives you the defensive profile of that single type.
Pokémon GO vs. Main-Series Games
Pokémon GO uses different numerical battle multipliers from the main-series games. This calculator is intended primarily as a main-series type-chart reference rather than an exact Pokémon GO damage calculator.
Advanced Tips for Competitive Play
Check Shared Team Weaknesses
When building a team, examine each Pokémon's defensive profile and look for repeated weaknesses. Several team members sharing the same 2× or 4× weakness can make the entire team vulnerable to one common attacking type.
Choose Coverage Moves Carefully
Coverage moves help an attacker deal with Pokémon that resist its main attacking types. Check which types resist your primary attacks, then consider a move type that pressures those defensive answers.
Plan Around Opponent Switches
A strong type advantage often causes an opponent to switch Pokémon. Understanding weaknesses and resistances can help you anticipate which defensive option may come in next rather than evaluating only the current matchup.
Frequently Asked Questions
What is a dual-type Pokémon?
A dual-type Pokémon has two types at once, such as Fire and Flying. Its defensive weaknesses and resistances are calculated by multiplying the effectiveness of an incoming move against both types.
How are 4× weaknesses calculated?
A 4× weakness happens when both defensive types are weak to the same attacking type. A 2× weakness against the first type multiplied by a 2× weakness against the second type results in 4× damage effectiveness.
Can two type effects cancel each other out?
Yes. If one defensive type is weak to an attack at 2× while the other resists it at 0.5×, the two multipliers combine to produce neutral 1× effectiveness.
Does this Pokémon type calculator work for Pokémon GO?
The calculator is designed primarily around the main-series Pokémon type chart. Pokémon GO uses different battle damage multipliers, so its exact damage percentages can differ.
How does Terastallization affect weaknesses?
After Terastallization, defensive type effectiveness is based on the Pokémon's Tera Type rather than its original defensive typing. You can check that defensive profile here by selecting the Tera Type as a single type.
Can abilities change type effectiveness?
Yes. Certain Pokémon abilities can add immunities or otherwise change how moves affect a Pokémon. This calculator shows the base type-chart interaction and does not apply ability-specific overrides.
Conclusion
Type matchups are one of the most important parts of Pokémon battling. Knowing whether an incoming move deals 4×, 2×, neutral, resisted, or zero effectiveness can influence team building, move selection, and battle decisions.
Use the Pokémon type calculator above whenever you need to check the defensive weaknesses, resistances, and immunities of a single or dual Pokémon typing.