What is a no-vig probability?
It is an implied probability rescaled after removing the percentage built into both sides of a betting market.
Fair probability from both sides
No vig calculator for fair odds.
Enter both sides of a two-way market to remove the built-in margin and calculate each side's fair probability.
Side 1 fair probability50.00%
Side 2 fair probability50.00%
Market hold4.76%
How it works
Make both sides add to 100%.
Listed prices usually imply probabilities totaling more than 100%. The difference is the market hold. Removing it lets both sides share exactly 100% in proportion to their listed prices.
No-vig probability describes the market's relative pricing. It is not an independent forecast and can change whenever either price moves.
What is sportsbook hold?
Hold is the amount by which all listed implied probabilities exceed 100%. It represents the pricing margin, not a guaranteed sportsbook profit.
Why can a market show negative hold?
Odds copied from different times or sportsbooks can add to less than 100%. The calculator labels that price gap instead of treating it as a normal positive margin.