Guide · Verified for patch 16.13
What Is MMR in League of Legends?
MMR (Matchmaking Rating) is the hidden numeric rating League of Legends assigns to every player to build balanced matches. A descendant of the chess Elo system, it rises when you win, falls when you lose, and determines both your opponents and your LP gains — independently of the rank displayed on your profile.
MMR, rank, LP: three different things
Your rank (Iron to Challenger) is the storefront: a cosmetic badge that progresses in 100-LP steps. LP is the currency of that storefront. MMR is the internal ledger: a continuous number, never displayed, representing what the system actually thinks of your level. In the early seasons of LoL this number was public; Riot hid it to simplify the ranked experience, but it never stopped running everything behind the scenes.
What MMR concretely decides
Three things, none of them small. Your opponents: matchmaking assembles ten players of similar MMR, not ten players of the same rank — which is why a Silver can face Golds. Your LP gains: if your MMR runs ahead of your rank, the system pushes you upward with +22 to +28 LP per win; if it lags, it throttles you to +14. Your losses mirror the same logic. Two players at the same rank can therefore live two opposite ranked experiences.
How MMR moves
Only the result counts: win or loss. Your KDA, vision score or damage don't enter the ranked calculation. Beating a higher-MMR team pays more; losing to a weaker one costs more. In practice most games are balanced, so figure roughly +10 / −10 points per game. At the start of each season, a partial compression pulls every MMR toward the average — the only "reset" that exists.
Estimating your MMR right now
Since Riot doesn't publish the number, it's estimated by triangulation: your rank sets the base band, your win rate signals the gap, your LP gains confirm it. That's exactly what our MMR checker does, free and without touching your account. And if your MMR is lagging behind your ambitions, the guide on improving your MMR covers the only methods that work.
Frequently asked questions
Does MMR exist in normals and ARAM?
Yes, every queue has its own independent MMR. Your ARAM MMR can sit well above your ranked MMR, which explains surprisingly sweaty ARAM lobbies.
Does individual performance affect MMR?
In standard ranked queues, no: only the game's result counts. Recent systems like Aegis of Valor protect LP in specific cases (strong autofill performance) but don't change how MMR itself is computed.