EV / Edge Calculator

Expected value tells you, on average, what every dollar wagered actually returns. Enter your bet odds and either the fair odds (no-vig) or your estimated win probability.

EV %
+6.38%
Beats fair value
Expected $ Profit
+$6.38
on a $100 stake
Edge %
+2.55%
42.6% true vs 40.0% implied

What this means

Expected value (EV) = (decimal odds × true win probability) − 1. Positive EV means the bet beats fair value on average; negative EV means it loses to it over time.

If you know the fair odds from a no-vig source (Pinnacle, multi-book devig), use the "Fair odds" mode. If you have your own model of the win probability, use the "Probability" mode and enter the percent.

Edge % = the difference between your true win probability and the bet's implied probability. A 3-5% EV bet is usually considered strong; 8%+ is rare and worth scrutiny — confirm your fair input.

Other calculators

No-Vig CalculatorStrip the sportsbook vig from any market to find true fair odds.Kelly Criterion CalculatorOptimal bet sizing based on edge and bankroll.Arbitrage CalculatorStake-sizing that locks in a guaranteed return.Hedge CalculatorLock in profit or cut losses with a counter-bet.