About LoL Alchemy Lab

What is LoL Alchemy Lab?

LoL Alchemy Lab is an independent, free theorycrafting and statistics site for League of Legends and Teamfight Tactics. The idea is simple: take the game's official data and compute the exact math —damage, gold efficiency, effective health, scalings, combos— so anyone can understand why a build, champion or item works, not just what is meta.

No sign-up, no tracking cookies and no made-up data: what you see is computed or measured, never fabricated.

The engine: real math, not opinions

The heart of the site is an engine that reproduces League of Legends' real formulas from Riot's official data (Data Dragon and Community Dragon), always pinned to the live patch. It computes armor and magic-resist mitigation, penetration and lethality, physical/magic/true damage, DPS per item, combo windows and matchups.

When we lack a value, we say so: we prefer an honest "no data" state over an invented number. That is a project rule.

Everything about each champion

The champion database gathers, for each one, its description and role, its abilities (passive, Q, W, E, R) with their scalings and cooldowns, its base stats with per-level growth and its skins. All patch-current, in Spanish, English and Portuguese.

And it doesn't stop at the profile: every champion has its win rate by lane, region and elo, its recommended build and its matchups.

Every item, with its real value

The item database shows each item with its stats, recipe, what it builds into, which champions build it (with their win rate) and, above all, its gold efficiency: how much of its price actually returns in stats, and how much its passive is worth on top.

Real community statistics

An in-house crawler follows each region's top ladder through the Riot API and builds a win-rate tier list, summoner profiles with an "Alchemy Score", the bot-lane duo ranking and the patch item meta. Real games, not estimates.

Labs and guides

To experiment there's the build simulator, the matchup optimizer (Versus) and the labs for mitigation, scaling and power spikes. And to learn the theory behind it, the guides hub: each one anchored in the engine's real formulas.

Languages, data and honesty

The whole site is in Spanish, English and Portuguese, with every page mirrored across languages. Game data comes from Riot Games (Data Dragon, Community Dragon and the official API). It is free, runs no tracking ads, and is sustained by voluntary donations.