Betting ROI Calculator
Track your betting performance with ROI calculations. Enter your total stakes and returns to see your true profit or loss percentage over time.
Benchmark: Professional sports bettors typically achieve 2-10% ROI long-term. Anything above 5% is excellent.
Understanding Betting ROI
ROI (Return on Investment) measures how much profit you make relative to how much you risk. It's the most important metric for evaluating betting performance.
ROI Benchmarks
- Below 0%: Losing money overall
- 0-2%: Breaking even (typical recreational bettor)
- 2-5%: Good performance (skilled bettor)
- 5-10%: Excellent (professional level)
- Above 10%: Exceptional (rare, may indicate small sample size)
Sample Size Matters
A 20% ROI over 10 bets means little. You need hundreds of bets to know if your ROI is sustainable. Variance can create winning or losing streaks that don't reflect true skill.
What Actually Moves Your ROI
Two bettors with the same return on investment can be taking very different risks. ROI measures profit against what you staked, so it says nothing about how much variance you took on to get there. Betting long odds produces wild ROI swings in both directions, while betting short odds produces a flatter line that takes far longer to reveal whether you have an edge.
Sample Size Beats Everything
A high ROI over fifty bets is usually luck. Serious assessment starts in the hundreds of bets, and even then a hot run can flatter a losing approach. Sustained ROI in the low single digits is a genuinely strong result in sports betting, and anything advertised well above that over a short record deserves suspicion rather than admiration.
A Faster Signal
Because ROI takes so long to become meaningful, many bettors track closing line value instead: whether the odds they took were better than the odds available at kickoff. If you consistently beat the closing line, profit tends to follow. If you don't, a positive ROI is more likely to be variance than skill.