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Betting calculators
The maths behind +EV betting, one tool at a time. American odds throughout.
- No-vig calculatorFair odds for each side once the book's margin is taken out.
- Kelly calculatorHow much of your bankroll to bet when you have an edge.
- Odds converterAmerican odds to decimal and implied probability, and back.
- Hedge calculatorLock in a result on an open bet by betting the other side.
- Round robin calculatorEvery parlay in a round robin, and what it pays.
- Arbitrage calculatorSplit a stake across books so every outcome pays the same.
- Hold calculatorHow much a market charges, as the share of bets the book keeps.