Kelly Criterion Calculator
Determine optimal bet sizing for maximum bankroll growth
Enter as percentage (55) or decimal (0.55)
Understanding Kelly Criterion
The Kelly Criterion determines the mathematically optimal bet size to maximize long-term bankroll growth. The formula is:
Kelly % = (bp - q) / b
Where b = decimal odds profit (win/risk), p = win probability, q = 1 - p.
Full Kelly is too aggressive for most bettors. Quarter Kelly provides 75% of the growth rate with dramatically less variance.
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