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Kelly Criterion Calculator & Betting Tools

Kelly Multiplier
Odds
Est. True Prob.
%
Bankroll
Summary
Stake % of Bankroll0.00%
Estimated stake size$0.00

How to Use the Kelly Criterion Calculator

The Kelly Calculator determines the optimal bet size as a percentage of your bankroll based on your perceived edge.

The Kelly Criterion is designed to maximize long-term bankroll growth while accounting for risk. Because full Kelly staking can be aggressive, BetSignal allows users to apply a Kelly Multiplier to reduce volatility.

How It Works

Enter your bankroll.
Enter the odds being offered.
Enter your estimated true probability.
Select a Kelly Multiplier (e.g., 0.25, 0.5, or 1.0).

The Calculator Outputs

Recommended stake as a percentage of bankroll
Recommended stake amount in dollars

Lower multipliers reduce risk and drawdowns while preserving long-term growth potential.

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