What is the vig?
The vig (short for vigorish, also called the juice) is the margin a sportsbook builds into its odds. It is the reason the two sides of a market add up to more than 100% probability — that extra slice is the book's built-in profit.
Enter the odds for both sides of a two-way market. The calculator removes the margin and shows the fair probability and fair odds for each side, plus the exact vig percentage the book is charging.
Frequently asked questions
How much is a typical vig?
On a standard two-way market priced at -110 on both sides, 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 against the prices at other books is one of the most reliable ways to spot a +EV bet.