What the vig is
The vig (or juice, or margin) is the sportsbook's cut. A market at -110 on both sides implies 52.4% + 52.4% = 104.8%. The extra 4.8% is the overround, and it's how the sportsbook makes money whoever wins.
No-vig fair odds calculator
Enter the odds for each side of a market. See how much the sportsbook is charging and what the fair odds would be with the margin taken out.
Vig (margin)4.55%
Overround4.76%
Side A fair odds+100 · 50.0%
Side B fair odds+100 · 50.0%
For information only. Results use the odds you enter and don't include any sportsbook rules or limits.
How it works
No-vig calculator: the basics
Fair odds
Fair odds are what the prices would be with no margin. The calculator scales each side's implied probability so they add up to exactly 100%, then turns those back into odds.
Using fair odds
Sharp bettors use no-vig prices from efficient markets as a benchmark. If another sportsbook offers better odds than the fair price, that bet may have positive expected value.
Three-way markets
Soccer and some other markets have a draw. Add the third price and the margin is spread across all three outcomes.
For cappers
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FAQ
No-vig calculator questions
How do you calculate the vig?
Add up the implied probability of every outcome (1 ÷ decimal odds). Anything over 100% is the overround. The vig as a share of what you stake is 1 − (1 ÷ total).
What is the vig on -110 / -110?
The overround is 4.76% and the vig is 4.55%. The fair price for each side is +100 (2.00).
Which method does this calculator use?
The multiplicative (proportional) method, which scales each side by the same factor. It's the most widely used way to remove the vig.