Kelly Criterion Calculator
All calculatorsThis calculator sizes a bet from your edge and your bankroll using the Kelly criterion. Enter the price, your win probability and your bankroll, then choose full, half or quarter Kelly.
What it does. It sizes your bet from your edge and your bankroll, so you grow your money as fast as the math allows without risking it all.
How to use it. Enter the odds, your true win probability, your bankroll, and pick full, half, or quarter Kelly.
Why it matters. Bet the same amount every time and you leave money on the table. Bet too much and you blow up the account. Kelly sits in between. Most sharps use half or quarter Kelly, because no probability estimate is perfect and a smaller fraction protects you when yours is off.
The guide behind this tool, in plain language.
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