About Type Matchups

Type Matchups is run by a single independent builder as six tools built around one idea: show the matchup, not just the number. Every calculator states the multiplier it computes, works a real example through to the same result the tool itself shows, and is checked against the full 18-type effectiveness chart used in the games since Generation 6 (X/Y, 2013), which added the Fairy type and changed Steel's resistances.

How the calculators work

Every tool on this site runs through one shared engine: a hand-entered copy of the 18x18 type chart (see it in full here), and a small set of pure functions that combine, group, rank or score matchups from it -- one function per calculator, each checked against hand-derived expected values (including several famous, independently verifiable in-game facts) in the site's own test suite before it ships.

Where the chart comes from

The type-effectiveness rules themselves are common knowledge from the core Pokémon video games, not licensed or scraped data -- every cell was entered by hand from the games' own public mechanics, then cross-checked in the test suite against a second, independently hand-typed set of known matchups so a mistake couldn't silently ship. This is the standard chart every mainline game has used since Generation 6.

What it doesn't do

This isn't an official Pokémon product, and Type Matchups isn't affiliated with, endorsed by, or sponsored by Nintendo, Game Freak, Creatures Inc., or The Pokémon Company. Pokémon and the names of individual types are trademarks of their respective owners. These tools cover type-effectiveness math only -- no species database, no stats, no move lists, and no in-game data beyond the 18-type chart itself. See Terms.

Every calculator

• Pokémon Type Calculator -- Pick an attacking type and a defending type (or two), and see the exact damage multiplier -- 4x, 2x, neutral, 1/2x, 1/4x or 0x -- with the reason for it, worked from the full 18-type effectiveness chart.
• Pokémon Type Chart -- The complete 18x18 Pokémon type effectiveness chart (Generation 6 onward, with Fairy): every attacking type down the rows, every defending type across the columns, with hover highlighting, a legend and a printable layout.
• Pokémon Weakness Calculator -- Enter a Pokémon's one or two types and see all 18 attacking types sorted into what hits it for 4x, 2x, neutral, 1/2x, 1/4x or 0x damage -- the defensive side of the type chart, built for one specific typing.
• Dual-Type Weakness Calculator -- Every one of the 171 possible Pokémon typings -- 18 single types plus all 153 dual-type combinations -- ranked by weaknesses, resistances, immunities and a disclosed defensive score, sortable by any column.
• Type Coverage Calculator -- Pick up to four attacking types and see how many of the 171 possible Pokémon typings they hit super effectively, with a coverage score and the specific gaps left uncovered.
• Pokémon Type Matchup Quiz -- Ten random attacking-vs-defending type questions pulled from the full effectiveness chart, multiple choice, with your score graded from Keep studying up to Ace Trainer.

Corrections

If a matchup or figure here looks wrong, email hello@typematchups.com.