What is Expected Value (+EV)?
Definition
A mathematical calculation of the average amount a bettor can expect to win or lose per bet over time. Positive expected value (+EV) bets are the only sustainable path to profitability in sports wagering.
Related Terms
A strategy focused on finding bets where the implied probability from the odds is lower than the bettor's estimated true probability of the outcome. Consistent value betting is the foundation of long-term profitable wagering.
A numerical representation of the likelihood of an outcome and the potential payout. Odds formats include decimal (2.50), fractional (3/2), and American (+150), each conveying the same probability differently.
The net profit or loss expressed as a percentage of total money wagered over a period. A positive ROI means the bettor is profitable, with professional sports bettors typically targeting 3-8% long-term ROI.