Vig Calculator
The vig (also called the juice, vigorish, or margin) is the bookmaker's built-in profit on every market. This calculator shows the exact vig on any set of odds and strips it out to give you the fair price for each outcome.
What is the vig?
The vig, juice, vigorish, margin, or overround all refer to the same thing: the bookmaker's cut embedded in the odds. Rather than charging a visible fee, a bookmaker shades each outcome's odds so that the implied probabilities of all outcomes sum to more than 100%. At 1.90 / 1.90 on a 50/50 market, each side implies 52.63% probability. Add them together: 52.63% + 52.63% = 105.26%. The extra 5.26% is the vig - the bookmaker profits regardless of the result.
How to calculate the vig (2-way market)
The formula is: vig = (1/odds1 + 1/odds2 - 1) x 100. For the 1.90 / 1.90 example: (1/1.90 + 1/1.90 - 1) x 100 = (0.5263 + 0.5263 - 1) x 100 = 0.0526 x 100 = 5.26%. Every dollar wagered on this market returns an average of 94.74 cents - the other 5.26 cents is the bookmaker's margin.
How to calculate the vig (3-way market)
The same formula extends naturally to three-way markets (home / draw / away in football). Take home 2.50, draw 3.20, away 2.90: implied probabilities are 1/2.50 = 40.00%, 1/3.20 = 31.25%, 1/2.90 = 34.48%. Total = 105.73%. Vig = 5.73%. This is the standard overround on a typical European football match. Use the calculator above to check the vig on any 3-way market instantly.
How to remove the vig (fair odds)
To get the no-vig fair odds, divide each implied probability by the total overround. For the 1.90 / 1.90 example, the overround is 1.0526. Each side's fair probability = 52.63% / 1.0526 = 50.00%. Fair decimal odds = 1 / 0.50 = 2.00. Both sides are worth 2.00 on a true coin flip - the 0.10 difference per side is the bookmaker's margin. The widget above outputs these fair (no-vig) odds for every outcome automatically.
Why does the vig matter?
A lower vig means better value odds for the bettor - more of the implied probability budget goes to the real outcome probability rather than the bookmaker's profit. Knowing the vig is the first step toward finding +EV bets where the odds exceed the true probability. Use our EV calculator to quantify edge once you have the fair price, or our arbitrage calculator to find risk-free profit when the combined vig across two books goes negative. To understand what +EV betting is and how it works long-term, check the blog. Or skip straight to live +EV signals identified automatically across major bookmakers.