How to Find Fair Odds With a No-Vig Calculator | OddsGuard
Strip sportsbook margin from both sides of a line to find true fair odds.
By OddsGuard Editorial · Published
Short answer
No-vig odds are the price of a bet with the sportsbook's margin removed. They show the market's true estimate of each side's chances, letting you judge whether another book's price is favorable.
Where the vig hides
Convert both sides of a two-way market to implied probabilities and add them together. On a -150 / +130 moneyline, -150 implies 60.00% and +130 implies 43.48%, totaling 103.48%. The extra 3.48 percentage points is the sportsbook's built-in margin (the vig).
How to remove the vig
- Convert each side to implied probability: 60.00% and 43.48% (total 103.48%).
- Divide each side by the total (1.0348): 57.98% and 42.02%.
- Convert back to American odds: about -138 and +138. Those are the fair no-vig prices.
If another sportsbook offers the favorite at -130, that price beats the fair -138 line and puts expected value in your favor. You can run any market through our No-Vig Calculator automatically.
Which line to de-vig
Use a sharp, high-limit market whenever one is available. Because sharp books adjust fastest on injury news and large wagers, their no-vig midpoint is a stronger benchmark than a soft recreational line.
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