No-Vig Calculator

The No-Vig Calculator is essential for finding the “True Probability” of a sporting event. Bookmakers make money by adding a margin (the “vig” or juice) to their odds, meaning the prices they offer do not reflect the actual probability of the outcome. This tool strips that margin away to show you the fair market price.

Understanding the Inputs
To calculate the fair odds, you need to input both sides of a two-way market. For example, if you are looking at a Match Winner market, enter the Side A Odds for the favorite and the Side B Odds for the underdog. The calculator works with decimal odds to provide the most precise mathematical output.

Interpreting the Dashboard
Once both odds are entered, the dashboard reveals three critical metrics:

• Fair Odds (A): The true decimal odds for Side A after the bookmaker’s profit margin has been removed.

• Fair Win % (A): The statistically accurate win probability for the selection. This is the value you should use in your EV and Kelly calculators.

• House Edge (Vig): The total percentage of “tax” the bookmaker has built into this specific market.

Why use this tool?
Professional bettors use No-Vig odds from the world’s sharpest sportsbooks as a benchmark for “True Price.” By finding the fair win probability here, you can then hunt for mispriced odds at other sportsbooks to identify high-value +EV opportunities.