Free Tool
Bankroll Calculator
Manage your gambling bankroll wisely. Calculate optimal bet sizes and see risk of ruin.
Your Bankroll
Safe: 1%Moderate: 2-3%Risky: 5%+
Results
Flat Bet (2%)
$20.00
Risk Level: Moderate
Kelly Criterion Bet
$0.00
Half Kelly: $0.00
Your Edge
+0.0%
Negative expectation (-EV)
How Bankroll Management Works
The Kelly Criterion calculates the mathematically optimal bet size given your edge. Half Kelly (50% of Kelly) is recommended for most bettors — it reduces volatility while still capturing most of the growth. A 1-2% flat bet per wager is standard for recreational bettors. Never bet more than 5% of your bankroll on a single wager.