Expected Value Calculator
Calculate the expected value of a bet based on your estimated win probability.
Expected Value Calculator
Winning a bet does not automatically mean it was a good bet. Losing a bet does not automatically mean it was bad. What matters is whether the price was in your favor when you placed it. That is exactly what an expected value calculator helps you figure out.
An EV calculator tells you whether the odds you are getting are better or worse than the true probability of the outcome. If the sportsbook is hanging a number that is better than fair, that is a positive expected value bet. If the line is worse than fair, the bet may still win tonight, but it is the kind of wager that loses money over time.
That distinction is where good bettors separate themselves. They care less about sounding confident and more about whether the number is beatable. A strong sports betting expected value calculator helps turn that idea into something measurable instead of emotional.
Prefer not to do this by hand? AVO's positive EV betting tool surfaces +EV bets the moment a sportsbook misprices a market.
Frequently Asked Questions
What is expected value in sports betting?
Expected value, usually shortened to EV, is the average amount you would expect to win or lose if you placed the same bet over and over again at the same odds.
That is why sharp bettors care so much about price. A bet can lose tonight and still be a good bet. A bet can win tonight and still be a bad one. What matters is whether the number you took was better than the true probability of the outcome.
If a sportsbook offers the Warriors at +110, but the fair market says the game is closer to a coin flip, that +110 may have positive expected value. The edge is in the price, not in being certain the team wins.
How do you calculate expected value?
The basic expected value formula is:
EV = (win probability × profit if win) - (loss probability × stake)
Say you bet $100 at +110 odds, and your fair win probability is 50%.
That looks like this:
EV = (0.50 × 110) - (0.50 × 100) = 55 - 50 = $5
That means the bet is worth $5 in expected profit on average. It does not mean you win $5 tonight. It means the price is favorable if that probability estimate is right.
When should you use an expected value calculator?
You should use an expected value calculator anytime you want to know whether a bet is actually worth taking. If you are serious about long-term results, this is not optional.
Most losing bettors focus on picks. Sharp bettors focus on price. An EV calculator helps you compare the number you are being offered to the number the bet should actually be. That is how you stop guessing and start evaluating wagers like prices instead of opinions.
Explore AVO's betting tools
These calculators show you the math. AVO's tools do the finding — scanning 70+ sportsbooks in real time so the opportunities come to you. Every tool below is included in the free plan (up to 3% ROI bets).
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