Bankroll Calculator
Calculate optimal bet sizes based on your bankroll. Understand how variance affects your betting and avoid the common mistake of overbetting.
Your Bankroll Details
About Bankroll Management
Why It Matters
Proper bankroll management won't make you a winner, but it prevents catastrophic losses. Even skilled bettors experience losing streaks. Your bankroll and bet sizes need to withstand these inevitable downturns.
The Unit System
A "unit" is a fixed percentage of your bankroll, typically 1-5%. If your bankroll is 500 and you use 2% units, one unit is 10. Betting in units keeps your stakes proportional to your bankroll.
Expected Value (EV)
EV shows your average profit or loss per bet over time. Positive EV means you're betting profitably. Negative EV means you're losing on average, which is the reality for most bettors due to bookmaker margins.
The Reality
With typical 48% win rate at 2.00 odds, you have negative expected value. This is normal, bookmaker margins ensure most bettors lose long-term. Bankroll management extends how long you can play, but doesn't change the underlying math.