Betting tools
Calculators that work on the numbers you enter. They are free and need no account.
- Arbitrage calculatorEnter the odds from each sportsbook and your total stake to see how to split it and what comes back on any result.
- Odds converterConvert betting odds between decimal, fractional and American formats and see the implied probability. Type a price in any format.
- Implied probability calculatorTurn odds into implied probabilities, see the sportsbook's vig (overround) and the no-vig fair odds for 2-way and 3-way markets.
- Kelly criterion calculatorKelly criterion calculator for sports betting: enter decimal odds, your win probability and your bankroll to see the Kelly stake, plus half and quarter Kelly. Formula and worked example.
- Expected value calculatorExpected value calculator for sports betting: enter decimal odds, your win probability and your stake to see the average gain or loss per bet, EV as a percentage and the break-even probability.
- Hedge calculatorHedge bet calculator: enter your original stake and odds and the odds now available on the opposite outcome to see the hedge stake that returns the same amount whichever side wins.