LoL betting tools & calculators
Free calculators to make informed decisions on League of Legends markets. Convert odds, size your stake, strip the vig, turn a game edge into a series edge, and run any two teams through our rating model. Everything runs live in your browser. 18+, not financial advice.
Match predictor
Our Elo model's win probability for any two rated teams, and the edge against a price you enter.
Kelly stake sizer
How much to stake from your bankroll given the price and your win estimate. Quarter-Kelly is the sane default.
No edge means no bet. Capping at quarter-Kelly keeps variance survivable on a single match.
Series win calculator
A single-game edge gets amplified over a series. Turn a per-game chance into a series win and likely scoreline.
Odds converter
Decimal, American, implied probability, and the Polymarket price are the same number in different clothes.
No-vig fair odds
Strip the bookmaker's margin to see the fair probability behind a two-way price.
The match predictor uses our Elo model (412 rated teams). All tools are estimators, not guarantees, and a single match is high variance. Bet only what you can afford to lose.