How do dual types combine?

The game multiplies both matchups. A Water/Ground Pokémon takes 4x from Grass (2x against Water times 2x against Ground) and 0x from Electric, because Ground's immunity overrides Water's weakness.

Does the type chart change by generation?

Yes. Generation 1 had 15 types with no Dark, Steel or Fairy, Bug and Poison were super effective against each other, and Ice hit Fire for neutral damage. Dark and Steel arrived in Generation 2 and Fairy in Generation 6, when Steel also lost its Ghost and Dark resistances. The generation selector reproduces each era.

Can it check a whole team?

Team mode takes up to six Pokémon, forms included, and shows every attacking type against the team with shared weaknesses and the types nobody resists. Inverse battle mode flips the chart.

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Type Calculator.

18 × 18 matrix · dual types multiply
0× immunity overrides everything

how much damage this typing takes

Defending type · pick up to 3

Tera type · optional

Terastallized Pokémon defend with the Tera type only. Stellar keeps the original typing.

Ability

Defensive profile · Fire / Flying

3 weak

Resists6

Immunities1

Net matchups+4

WEAK · 4×double weakness

rock4×

WEAK · 2×super effective

water2×electric2×

NEUTRAL · 1×plain damage

normal1×ice1×poison1×flying1×psychic1×ghost1×dragon1×dark1×

RESIST · ½×halved

fire½×fighting½×steel½×fairy½×

RESIST · ¼×double resistance

grass¼×bug¼×

IMMUNE · 0×no damage at all

ground0×

Matchup spreadacross all 18 attacking types

4× weak

2× weak

neutral

resisted

immune

Pokémon type chart and effectiveness calculator

Pokémon battles revolve around a type effectiveness matrix. In the current games it is an 18x18 chart; older generations used smaller ones, and this calculator can switch between them. Every attacking move has a type, and every defending Pokémon has one or two types. The interaction between them produces multipliers of 2x (super effective), 1x (neutral), 0.5x (not very effective), or 0x (immune).

Dual-type calculations

When a Pokémon has two types, the game multiplies both matchups together. A Water/Ground type takes 4x damage from Grass (2x against Water times 2x against Ground) but is completely immune to Electric (0x against Ground overrides everything). This creates 0.25x double resistances and 4x double weaknesses that single types never experience.

Generation differences

The chart has changed over the years, and the generation selector reproduces each era exactly. Gen 1 had 15 types: no Dark, Steel, or Fairy. Bug and Poison were super effective against each other, Ice hit Fire for neutral damage, and Psychic was flat-out immune to Ghost because of a bug in the original games. Gen 2 through 5 added Dark and Steel and fixed those quirks, with Steel resisting both Ghost and Dark. Gen 6 added Fairy and removed the Ghost and Dark resists from Steel, which produced the modern chart.

Terastallization

In Scarlet and Violet, a Terastallized Pokémon defends with its Tera type only; the original typing no longer counts for incoming damage. Set a Tera type in defense mode to see the new weaknesses and resistances. Tera Stellar is the exception: it keeps the original defensive typing.

Coverage analysis

Select multiple attack types to analyze combined coverage across the entire Pokédex. Factor in special moves like Freeze-Dry (Ice move that hits Water super effectively), Flying Press (dual Fighting/Flying attack), and Thousand Arrows (Ground move that hits Flying types). Abilities like Scrappy and Tinted Lens further modify coverage, and defensive abilities from Levitate to Wonder Guard and Purifying Salt are covered in defense mode.