No-Vig Calculator
Enter the two (or three) book prices for a market and we'll back out the fair odds the book would have offered with no margin.
Fair Odds 1
+100
50.00% implied
Fair Odds 2
+100
50.00% implied
Vig (Hold)
4.76%
104.76% total implied
What this means
Sportsbooks build a margin (the "vig" or "juice") into every market — the implied probabilities of both sides add up to more than 100%. Removing that margin gives you the book's true estimate of each outcome's probability.
We use multiplicative devigging: each side's implied probability is divided by the total so they sum to exactly 100%. It's the most common method and a good default. The result you see is the fair price the book would offer if it took zero margin.
Use this any time you want to compare a longer price somewhere else to a market's true fair value.