Betting Bankroll Calculator
Calculate optimal bet sizes using Kelly Criterion and conservative bankroll management strategies.
Betting Bankroll Calculator
Calculate optimal bet sizes using Kelly Criterion and conservative bankroll management strategies.
2 %
5 %
Your Results
Based on your 1,000 bankroll at -110 odds with an assumed 5% edge:
• Full Kelly stake: $55 — mathematically optimal growth, and far too swingy for most people
• Your 2% flat stake: $20 (50 units of bankroll)
Estimated risk of ruin: 0.40% flat-betting your 2% stake, and 13.30% if you bet full Kelly.
That gap is the whole argument for fractional Kelly. These are diffusion approximations from your assumed edge, not guarantees — and an edge you cannot prove is the likeliest error here. If your true edge is zero, ruin approaches certainty at any stake. Bet only what you can lose.