Tool · Calculator
Bankroll calculator
The single biggest reason bettors go broke isn't bad picks — it's bet sizing. Set a unit as a fixed percentage of your bankroll and you can survive a long cold streak that flat-dollar betting would not. Enter your bankroll and risk profile to get your unit size.
1 unit
$20.00
Suggested max bet (5u)
$100.00
Flat bets before bust
50
Flat-stake one unit per bet and you'd need 50 straight losers to wipe out — the point of unit sizing is surviving variance. Most pros stay at 1–2% a unit. Sizing by your actual edge instead? Use the Kelly calculator.
How it works
- Unit = bankroll × your %. Conservative is ~1%, moderate ~2%, aggressive ~3%. Bet in units, not dollars.
- Re-base as you go. Recalculate your unit when your bankroll moves meaningfully — that's what keeps a downswing from compounding.
- Sizing by edge instead? If you can estimate your win probability, the Kelly calculator gives the growth-optimal stake. Track your results in the bet tracker.