Bankroll Management Calculator

Bankroll management is the practice of controlling how much you stake per bet relative to your total betting fund. It protects against ruin during losing runs and ensures you stay in the game long enough for your edge to materialise.

Most professional bettors stake between 1–3% of their bankroll per bet. Higher stakes increase variance and risk of ruin; lower stakes reduce short-term swings but require more bets to generate meaningful returns.

Unit betting divides your bankroll into equal units (e.g. 100 units). Each bet costs 1 unit, so your stake automatically adjusts as your bankroll grows or shrinks, keeping exposure proportional.

Even a bettor winning 50% of the time can face a run of 7+ consecutive losses. The streak estimate shows the expected maximum losing run at a 99% confidence level — use it to stress-test your stake sizing.

Kelly criterion calculates the mathematically optimal stake given your estimated edge. In practice, half-Kelly or quarter-Kelly is used to reduce variance while capturing most of the growth benefit.