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Strip the sportsbook's margin and find out what a prop is actually worth. Works for any sport, any market.
The vig — also called juice or hold — is the sportsbook's built-in profit margin on every bet you place.
When DraftKings lists a player prop at -110 on both sides, the implied probability of each side is 52.4%. Add those together and you get 104.8%. The extra 4.8% is the vig — money the sportsbook collects regardless of who wins.
No-vig probability removes that margin and shows you the true market consensus.
The formula is simple:
Over implied prob = |Over odds| / (|Over odds| + 100) [if negative odds]
Under implied prob = |Under odds| / (|Under odds| + 100) [if negative odds]
No-vig over = Over implied / (Over implied + Under implied)
Example:
Over -150 → implied 60.0%
Under +125 → implied 44.4%
Total: 104.4% (the 4.4% is the vig)
No-vig over: 60.0 / 104.4 = 57.5%
That 57.5% is the true probability. Not 60%.
Why does this matter? Because a bet is only profitable long-term if your edge exceeds the vig. Knowing the true probability tells you whether you actually have an edge or whether you are just paying the house.
Enter American odds for both sides. Results update instantly.
No-Vig Over
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No-Vig Under
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Vig
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Fair Over Odds (no margin)
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Mora Bets automatically calculates the no-vig probability for every MLB and NHL player prop every morning. Free. No signup required.
See Today's No-Vig Props →Generally 57% or higher indicates a prop where the math is in your favor. The higher the no-vig probability, the stronger the market consensus that this outcome is likely.
Implied probability includes the sportsbook's margin. No-vig removes it. A -150 line implies 60% but the true no-vig probability might be 57%. That 3% difference compounds over hundreds of bets.
Pinnacle and BetRivers typically have the lowest vig at around 2–4%. DraftKings and FanDuel average 5–8%. Shopping for the best line across multiple books is how sharp bettors minimize the vig impact.
Yes. Every MLB and NHL player prop on the Mora Bets dashboard shows the no-vig true probability automatically. Free to use. Updated every morning.
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