How to remove the vig
Convert each side to its implied probability, add them up, and divide each by the total so they sum to exactly 100%. Convert those fair probabilities back to odds.
This is the standard proportional method: it assumes the margin is spread evenly across the sides. Books often put more margin on long shots, so treat the result as an estimate of the fair price rather than a certainty.
- Fair probability = side’s implied probability ÷ sum of all sides’ implied probabilities.
- Fair decimal odds = 1 ÷ fair probability; convert to American from there.
- Equal prices (a pick’em such as -110/-110) always come out 50/50, +100 each.
Questions
What does no-vig mean?
No-vig (or de-vigged) odds are a market’s prices with the sportsbook’s margin removed, so the sides add up to 100%. They estimate what the market itself thinks each outcome’s chance is.
Why remove the vig?
To compare a price with your own estimate, or two books’ prices, on equal terms. A line of -110 looks like a 52.38% chance, but with the margin out a pick’em is really 50%.
Can I use it for a three-way market?
Yes. Switch to three outcomes to enter home, draw and away (soccer 1X2, or any market with three results).
Is the fair price the true probability?
No. It is the market’s probability with an even margin removed. Sharp markets are often close to the truth, but it is still an estimate.
Put it into practice: Sportsbook odds comparison. Livdy shows every book’s price side by side and the game logs behind every prop hit rate.