No-Vig Helper
Take out the bookmaker's cut to see the fair odds and true probabilities.
How to Use This Calculator
- Choose the odds format you’re working in (Decimal, Fractional, or American)
- Enter the bookmaker’s odds for each outcome in the event
- Add or take away outcomes whenever you need to
- See the fair odds (with no vig), the fair probabilities, and the bookmaker’s overround
The overround reveals how much extra probability the bookmaker has packed in as their margin.
Formula
Step-by-step process:
- Convert all odds to implied probabilities
- Sum the probabilities (will exceed 100%)
- Divide each probability by the total to get fair probabilities
- Convert fair probabilities back to odds
Overround (Vig) = Total Implied Probability - 100%
Frequently Asked Questions
What do vig and juice mean?
The vig (short for vigorish) or juice is the margin the bookmaker builds in. It guarantees the bookmaker makes money no matter how things turn out, and it equals the difference between the total implied probabilities and 100%.
What are fair odds?
Fair odds are the odds you’d see if the bookmaker took zero margin. They reflect the true probabilities each outcome is implied to have by the market.
How much vig should I expect?
Sharp bookmakers usually run a 2-3% overround, whereas recreational bookmakers might charge 5-7% or even more. The lower the vig, the better the odds you get as a bettor.