Risk of Ruin Calculator

Risk of ruin is the probability of losing your entire bankroll before reaching your profit goals. Even with a positive edge, aggressive staking can lead to 100% ruin probability over time.

Professional bettors aim for a risk of ruin below 1-5%. Anything above 10% means your bankroll management is too aggressive. Reduce your stake size or increase your starting bankroll to lower your risk.

Stake size is the biggest factor. Betting 1% of your bankroll per bet gives you much better survival odds than betting 5%. The Kelly Criterion suggests optimal stake sizing based on your edge and odds.

Yes. Even with a 55% win rate, betting too large a fraction of your bankroll can lead to ruin. Variance (bad luck streaks) can wipe you out before your edge kicks in. This is why bankroll management matters more than finding edges.