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    Kelly Calculator

    Calculate optimal bet size to maximize long-term growth

    Kelly Criterion
    Calculate optimal bet size to maximize long-term growth

    Implied Prob.: 40.00%

    25%
    10% (Conservative)100% (Full Kelly)
    Results
    Full Kelly8.33%
    Stake€83.33
    Fractional Kelly (Recommended)2.08%
    Recommended Stake€20.83
    Edge
    +5.00%
    Risk Level
    High
    Fractional Kelly (25-50%) reduces volatility while maintaining growth. Recommended for conservative risk management.

    What Kelly measures

    Kelly turns your edge (true probability vs odds) into a bankroll percentage. It helps you size bets consistently instead of guessing stake sizes.

    How to use it

    1. Enter your total bankroll.
    2. Add decimal odds and your estimated true probability.
    3. Use fractional Kelly if you want lower volatility.

    You may also want: Stake Calculator · EV Calculator

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