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The Kelly Criterion calculates the mathematically optimal bet size to maximize long-term growth. Enter your win probability and the odds offered.
Kelly Percentage
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Optimal Bet
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Half Kelly (Safer)
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Quarter Kelly (Safest)
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Edge
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⚠️ No edge detected. Kelly says don't bet. Your win probability doesn't justify the odds offered.
For informational purposes only. Not legal gambling advice. Must be 21+ in your jurisdiction.
Gamble responsibly. If you or someone you know has a gambling problem, call 1-800-522-4700.