Implied Probability Calculator

Enter odds to see the implied win probability and the bookmaker's margin.

01What Is Implied Probability?

Implied probability is the win percentage the odds suggest. At -110, the implied probability is 52.4%. If you believe the true probability is higher than the implied probability, the bet has positive expected value.

02The Vig

When you add up the implied probabilities on both sides of a bet, the total exceeds 100%. The excess is the vig - the sportsbook's commission. At -110 on both sides, the total is 104.8%, giving the book a 4.8% edge.