Remove the bookmaker's vigorish (juice) from any odds to find true implied probability and fair no-vig odds. Used by professional sports bettors and sharp money.
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Vigorish — also called juice, margin, or the house edge — is the commission bookmakers charge on every bet. Standard -110 odds on both sides of a bet creates a 4.55% vig, meaning the book profits regardless of outcome.
Removing the vig reveals the true implied probability of each outcome — what the bookmaker actually believes the odds are before adding their margin.
For a two-outcome market:
A no-vig calculator removes the bookmaker's margin from betting odds to reveal the true implied probability of each outcome. Sharp bettors use it to identify value bets where their estimated probability exceeds the no-vig probability.
Standard sportsbook vig on a two-sided market is 4.55% (both sides at -110). Pinnacle and sharp books often offer 2–3% vig. Recreational sportsbooks can charge 6–8% or more on parlays and props.
Convert each side to implied probability: for -110, that's 110/(110+100) = 52.38%. Add both implied probabilities: 52.38 + 52.38 = 104.76%. The vig is (104.76 − 100) / 104.76 = 4.55%.
Fair odds represent what each side would pay in a zero-margin market. For two equally likely outcomes, fair odds are +100 (even money) on both sides instead of -110.
This calculator handles two-outcome markets (moneylines, over/unders). For three-way markets (soccer match result), you would apply the same normalization formula across three implied probabilities.
Yes. Removing vig is a fundamental step in line shopping and value betting. Professional bettors compare the no-vig probability to their own model probability — if their model shows a higher win probability than the no-vig line, it may be a value bet.