How Pokemon Type Effectiveness Works
Each attacking type has a multiplier against each defending type: 2× for super effective, 1× for normal damage, 0.5× for not very effective, or 0× when the defender is immune. For a dual-type defender, multiply the two values. An Ice attack against Grass/Flying is 2×2=4×, while an Electric attack against Water/Ground is 2×0=0×. The calculator shows both parts of the equation so you can see exactly why the final result occurs.
How to Use the 18×18 Type Effectiveness Matrix
Matrix rows are attacking move types and columns are single defending types. Choose any cell to load that matchup into the calculator, then add an optional second defending type to test a dual-type target. The matrix covers the base type chart; STAB, abilities, weather, items, critical hits, and other battle modifiers apply after the displayed type multiplier.
The 4× Weakness Explained
A 4× weakness happens when both of a Pokémon's types are weak to the same attacking type. Familiar examples include Rhyperior against Water or Grass, Gyarados against Electric, Charizard against Rock, Scizor against Fire, and Garchomp against Ice. These matchups can decide a turn immediately, but abilities, items, Terastallization, and a game's damage rules may still alter the practical outcome.
Types That Are Immune to What?
Seven defending-type immunities are especially useful to memorize: Normal is immune to Ghost; Ghost is immune to Normal and Fighting; Ground is immune to Electric; Flying is immune to Ground; Dark is immune to Psychic; Fairy is immune to Dragon; and Steel is immune to Poison. Because any 0× factor makes a dual-type calculation equal zero, an immunity can completely override the second type's weakness.
How to Memorize Type Effectiveness
Learn the immunities first, then group intuitive relationships such as Water beating Fire, Ground, and Rock or Fire beating Grass, Ice, Bug, and Steel. Use the matrix for exceptions and reinforce them with the site's type quiz instead of trying to memorize all 324 single-type cells at once.
Type Effectiveness FAQ
How does Pokémon type effectiveness work?
Each attacking type has a 2×, 1×, 0.5×, or 0× relationship with each defending type. For a dual-type defender, multiply both relationships together.
Which Pokémon have famous 4× weaknesses?
Examples include Rhyperior against Water and Grass, Gyarados against Electric, Charizard against Rock, Scizor against Fire, and Garchomp against Ice.
What is the difference between 0.25× and 0.5× damage?
A 0.5× result means one defending type resists the attack. A 0.25× result means both defending types resist it, so 0.5 × 0.5 = 0.25×.
What types are immune to what?
Key immunities include Normal to Ghost, Ghost to Normal and Fighting, Ground to Electric, Flying to Ground, Dark to Psychic, Fairy to Dragon, and Steel to Poison.