Sports Betting EV Calculator

What expected value means

Expected value (EV) estimates the average profit or loss of a bet if the same price and win probability were repeated many times. Positive EV does not mean the next bet wins.

How this calculator works

Enter American odds, your estimated win probability, and a stake. The tool converts odds to decimal price, compares your win% to market implied probability, and returns EV for that stake.

Pair EV checks with the no-vig calculator when you need fair two-way prices, then organize prop boards in Fantasy Forge.