Type effectiveness is the attack type's factor against each defending type, multiplied together. Each factor is 0, ½, 1 or 2. A Fire move against Ferrothorn (Grass/Steel) hits 2 × 2 = 4×. An Electric move against Swampert (Water/Ground) does 2 × 0 = 0×, because Ground's immunity wipes out the Water weakness.
Dual-type matchups are where most battle mistakes happen: two weaknesses stack into a 4× hit, and one immunity cancels everything else. This calculator uses the 18-type chart in force from Pokemon X and Y (Generation VI, when Fairy arrived) through the current games. Choose the move's type and the defender's first and optional second type to get the multiplier, its in-game wording and the working. Below the result, a table runs all 18 attack types against the same defender, so you can read its weaknesses, resistances and immunities in one place. It covers the type chart only. Abilities such as Levitate or Flash Fire, Tera types, held items, weather and same-type attack bonus are not applied, and older generations used slightly different charts, for example Steel resisting Ghost and Dark before Generation VI.
Choose the type of the move being used. A Normal-type Pokemon using Thunderbolt attacks with Electric.
Choose the defender's first type, then its second type, or None for a single-type Pokemon.
The headline shows 0×, ¼×, ½×, 1×, 2× or 4×, with the factor for each defending type shown in the working.
The table lists every attack type against this defender, with counts of its weaknesses, resistances and immunities above it.
Result Damage multiplier: 4×
Effectiveness: Doubly super effective
Defending typing: Grass/Steel
Attack types it is weak to: 2
Attack types it resists: 9
Attack types it is immune to: 1
Both of Ferrothorn's types are weak to Fire, so the two 2× factors multiply into a 4× hit.
Result Damage multiplier: 0×
Effectiveness: No effect (immune)
Defending typing: Water/Ground
Attack types it is weak to: 1
Attack types it resists: 4
Attack types it is immune to: 1
Water alone would take double damage, but the Ground type's immunity zeroes the product.
Result Damage multiplier: 4×
Effectiveness: Doubly super effective
Defending typing: Dragon/Ground
Attack types it is weak to: 3
Attack types it resists: 3
Attack types it is immune to: 1
The famous 4× Ice weakness; the table also lists Dragon and Fairy as its other two weaknesses.
Multiplier = F(attack, type 1) × F(attack, type 2)
Ftype 2Each pair of attacking and defending types has one factor on the Generation VI+ chart. For a dual-type defender the two factors multiply, giving the possible results 0, 0.25, 0.5, 1, 2 and 4. Any 0 makes the product 0, so an immunity always wins. The multiplier then scales the base damage formula alongside STAB, critical hits and random variation, which this tool leaves out.
Dual-type Pokemon apply both type factors and the game multiplies them. If both types are weak to the move, 2 × 2 gives 4×. Garchomp, a Dragon/Ground type, takes 4× from Ice because both Dragon and Ground are weak to Ice.
The factors cancel: 2 × ½ = 1×, so the move does normal damage. Water against Mega Charizard X, a Fire/Dragon type, is an example: Fire's weakness and Dragon's resistance net out to neutral.
The 18-type chart introduced in Generation VI with Fairy, which is unchanged through Scarlet and Violet. Earlier games differ: before Generation VI, Steel resisted Ghost and Dark, and Generation I had Ghost failing to hit Psychic.
Yes. Any factor of 0 makes the product 0. Ground is immune to Electric, so even a Water/Ground or Flying/Ground pairing takes no damage from Electric moves, regardless of the other type's weakness.
No. STAB is a separate 1.5× bonus (2× with the Adaptability ability) for using a move that matches the attacker's own type. Multiply it on top of the type multiplier shown here if it applies.
2× and 4× show as super effective, ½× and ¼× as not very effective, and 0× as having no effect. A neutral 1× hit shows no message. The Effectiveness line uses the same wording, with doubly super effective and doubly resisted for the 4× and ¼× cases.
Using this tool in an assignment, article or report? Copy a citation, or a link for your website.
Tools Directory Editorial Team. (2026, October 26). Pokemon Type Effectiveness. Tools Directory. Retrieved October 26, 2026, from https://tools.milunir.com/gaming/pokemon-tools/pokemon-type-effectiveness/
Tools Directory Editorial Team. “Pokemon Type Effectiveness.” Tools Directory, 26 Oct. 2026, https://tools.milunir.com/gaming/pokemon-tools/pokemon-type-effectiveness/. Accessed 26 Oct. 2026.
Tools Directory Editorial Team. “Pokemon Type Effectiveness.” Tools Directory. Last modified October 26, 2026. Accessed October 26, 2026. https://tools.milunir.com/gaming/pokemon-tools/pokemon-type-effectiveness/.
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