Plan bankroll size and unit staking to survive expected variance.
A bankroll of fifty units or more absorbs normal variance, while ten units risks ruin from an ordinary losing streak. Profit comes from turnover multiplied by edge, so both matter. Most betting bankrolls fail from variance rather than from a negative edge, which makes unit sizing the more important decision.
Sports Bankroll
Unit stake = bankroll × unit percentage; expected profit = turnover × edge
These figures are estimates based on population-average formulas and are intended for training and recreational planning only. They are not medical advice. Consult a qualified health professional before starting or changing an exercise programme, particularly if you have an existing medical condition.
Unit stake = bankroll × unit percentage; expected profit = turnover × edge A bankroll of fifty units or more absorbs normal variance, while ten units risks ruin from an ordinary losing streak. Profit comes from turnover multiplied by edge, so both matter.
Most betting bankrolls fail from variance rather than from a negative edge, which makes unit sizing the more important decision.
This calculator takes 5 inputs: Bankroll, Unit size as a share of bankroll, Bets per month, Expected edge per bet, Average decimal odds. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.