What is the vig?
The vig (vigorish, or "juice") is the margin a sportsbook builds into its odds. It is why the two sides of a market add up to more than 100% probability — the extra slice is the book's profit. Removing it reveals the fair price, which is the market's best estimate of true probability. Feed that fair probability into our expected value calculator to spot bets with real value.
Worked example
A market is priced -110 / -110.
Frequently asked questions
How much is a typical vig?
On a standard two-way market at -110 / -110, the vig is about 4.5%. Sharper books charge less; softer markets and parlays charge more.
Why calculate no-vig odds?
Fair no-vig odds are the closest estimate of an outcome's true probability. Comparing them to other books' prices is a reliable way to find +EV bets.
Does this work for three-way markets?
This tool is built for two-way markets. Three-way markets (such as soccer with a draw) need all three prices to remove the vig accurately.