A betting unit is a standardized measure of bet size relative to your bankroll. Instead of saying "I bet $50," you say "I bet 1 unit." This makes comparing results across different bankroll sizes meaningful.
How to Define Your Unit
Most bettors use 1-5% of their total bankroll as 1 unit.
- $1,000 bankroll → 1 unit = $10-$50
- $5,000 bankroll → 1 unit = $50-$250
The most common approach is 1 unit = 1% of bankroll. This limits drawdown risk and allows for natural bankroll growth and reduction.
Why Units Matter
Standardization: If you move $10,000 to your betting account and then withdraw, your bet sizes in dollars change but your unit sizes stay constant relative to your current roll.
Comparison: When a picks service claims "I'm up 50 units this season," you can evaluate that regardless of their dollar amount.
Risk management: Keeping most bets at 1 unit and rarely going above 2-3 units is the hallmark of disciplined bettors.
Units and Kelly Criterion
The Kelly Criterion calculates optimal bet size as a fraction of bankroll. In practice, most sharp bettors use half-Kelly or quarter-Kelly to reduce variance. Units translate Kelly output into actionable bet sizes.
[Track your performance in units with Oddible →]
