No-Vig Fair Odds Calculator

Sportsbook prices always include a margin, which is why the implied probabilities of a two-way market sum to more than 100%. This calculator removes that margin. Enter both sides of a market and it normalizes the probabilities back to 100%, returning the fair win percentage and fair odds for each side.

No-vig fair odds from a sharp market are the industry-standard benchmark for what a bet is really worth. Once you know a fair price, everything else follows: compare it against other books' lines to find positive expected value, feed the fair probability into the Kelly calculator to size the bet, or use it to grade how much vig you are paying elsewhere.