Expected Value Calculator
Find Positive Expected Value Bets
Expected Value (EV) is the single most important metric in sports betting. It tells you the average profit or loss you can expect from a bet over the long run. Positive EV (+EV) bets are mathematically profitable, while negative EV bets will lose money over time.
Professional bettors focus exclusively on finding positive expected value opportunities. Our EV calculator helps you compare the sportsbook's implied probability against your own probability assessment to identify when you have an edge. Consistent +EV betting is the foundation of long-term sports betting profitability.
How to Use Expected Value
Step 1: Enter your bet amount and the odds offered by the sportsbook.
Step 2: Input YOUR assessment of the true win probability (not the implied odds from the book).
Step 3: If EV is positive, you have an edge. If negative, the book has the edge.
Example: If you believe Team A has a 60% chance to win, but the odds imply only 52% (like -110), that's a +EV bet worth taking.