What is expected value?
Expected value (EV) is the average amount you can expect to win or lose per bet if you placed the same bet many times. A positive EV (+EV) means the bet is profitable long-term. A negative EV (−EV) means you lose money over time.
How to find +EV bets
Compare the implied probability from the odds to your estimated true probability. If you believe an outcome is more likely than the odds suggest, the bet is +EV. Prediction market aggregators help by showing price discrepancies across platforms.
How to use
Enter your wager amount, the odds (American or prediction market price), and your estimated win probability. The calculator shows the expected value in dollars and as a percentage of your stake.
