Expected Value Betting Calculator
Calculate expected value to identify profitable betting opportunities over the long term
About this calculator
An Expected Value Betting Calculator helps determine whether a bet offers long-term profit potential by calculating the mathematical expectation of each wager. By comparing the implied probability of bookmaker odds with your assessed probability of an outcome, you can identify positive expected value (+EV) bets that should generate profit over time. This tool is essential for serious bettors who want to make data-driven decisions and build sustainable betting strategies based on mathematical principles rather than gut feelings.
How to use
Enter the bookmaker's odds and your estimated probability of the outcome occurring. The calculator will compute the expected value, showing whether the bet has positive or negative expectation. Look for positive EV results to identify potentially profitable betting opportunities that align with your probability assessments.
Frequently asked questions
What does positive expected value mean in betting?
Positive expected value indicates a bet should be profitable over many trials, meaning your estimated probability suggests better odds than the bookmaker offers.
How accurate do my probability estimates need to be?
Accuracy is crucial for EV calculations. Small errors in probability assessment can turn profitable bets into losing ones, so thorough research is essential.
Should I only place bets with positive expected value?
Generally yes, as positive EV bets offer long-term profit potential. Negative EV bets will typically lose money over extended periods of betting.