Confidence Interval Calculator
Calculate confidence intervals for your betting win rate to understand the range of your true skill level with statistical certainty.
Understanding Confidence Intervals
A confidence interval gives you a range where your true win rate likely falls. If you hit 55% in 200 bets, your true skill might be anywhere from 48% to 62% - that's the uncertainty inherent in small samples.
The key question: Is your entire confidence interval above breakeven? If so, you have statistical evidence of profitable betting. If the interval includes breakeven, you might just be running hot.
More bets = narrower intervals. That's why sample size matters so much in sports betting - you need volume to prove your edge is real.
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Responsible Gambling
Gambling should be entertaining, not a way to make money. Only bet what you can afford to lose, and never chase your losses.
- Betting more than you can afford to lose
- Chasing losses with bigger bets
- Lying to others about gambling habits