Calculate the mathematically optimal stake size to maximize bankroll growth.
About the Kelly Criterion
The Kelly formula is:(bp - q) / b where b = decimal odds - 1, p = your win probability, q = 1 - p. Half or quarter Kelly is recommended in practice to reduce variance. Never bet if the result is negative — there is no edge.Calculate the mathematically optimal stake size to maximize bankroll growth.
About the Kelly Criterion
The Kelly formula is:(bp - q) / b where b = decimal odds - 1, p = your win probability, q = 1 - p. Half or quarter Kelly is recommended in practice to reduce variance. Never bet if the result is negative — there is no edge.