No-Vig (Fair Odds) Calculator
Enter the two American odds for any two-way market (e.g. moneyline or spread at -110 / -110). The calculator removes the sportsbook\'s built-in margin and reveals the true implied probability and "fair" odds for each side.
How It Works
Sportsbooks build in a margin (the "vig" or "juice") so that the implied probabilities of both sides sum to more than 100%. For a -110 / -110 market, each side implies 52.38% probability; total 104.76%. The 4.76% over 100 is the book\'s hold.
To find "fair" odds, divide each side\'s implied probability by the total. For -110 / -110, fair probability per side is 52.38 / 104.76 = 50.00%. Fair odds are even money (+100 / +100). Use this calculator when comparing a single book\'s line against a sharp consensus, or when assessing the true price of a market before betting.