Vig Calculator

Enter the odds for both sides of a market to find the bookmaker's margin and the no-vig fair odds.

01What Is the Vig?

The vig (short for vigorish) is the sportsbook's commission. When both sides of a bet are priced at -110, the implied probabilities add up to 104.8%. That extra 4.8% is the book's edge. This calculator removes the vig to show you the fair probabilities.

02Why No-Vig Odds Matter

No-vig odds represent the true market expectation without the bookmaker's margin. If you can find a sportsbook offering better than no-vig odds, you have positive expected value. Line shopping across books to beat the no-vig price is one of the few proven edges in sports betting.