Kelly Criterion Calculator
Find the mathematically optimal bet size based on your edge and bankroll using the Kelly Criterion formula.
Inputs
Results
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Recommended Bet
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% of Bankroll
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Full Kelly %
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Expected Value
What Is the Kelly Criterion?
The Kelly Criterion is a formula that determines the optimal bet size to maximize long-term bankroll growth. It balances risk and reward by betting more when you have a larger edge and less when the edge is slim.
The Formula
f* = (bp - q) / b
- b = decimal odds - 1 (the profit per dollar wagered)
- p = probability of winning
- q = probability of losing (1 - p)
Why Use Half Kelly?
Full Kelly can be aggressive with large swings. Most professional bettors use half Kelly or quarter Kelly to reduce variance while still capturing most of the long-term growth advantage.
Get the Edge with Optimal Bet
Our app scans sportsbook pricing across the market to expose inefficiencies and uncover +EV edges. We compare odds, surface high-value opportunities, and deliver precision alerts so you can move with conviction.
