No-Vig Sports Calculator
Take out the bookie's cut to see the fair odds.
How to Use This Calculator
- Pick your odds format (Decimal, Fractional, or American)
- Enter the bookmaker’s odds for each outcome in the event
- Add or remove outcomes whenever you need to
- Check the fair odds (with no vig), the fair probabilities, and the bookmaker’s overround
The overround shows the extra slice of probability the bookmaker has added on 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 are the vig and juice?
The vig (short for vigorish) or juice is the margin the bookmaker builds in. It’s what keeps them in profit no matter the result, and it’s the gap between the combined implied probabilities and 100%.
What does fair odds mean?
Fair odds are the odds you’d see if the bookmaker took no margin at all. They reflect the true probabilities the market is implying for each outcome.
What's a normal amount of vig?
Sharp bookmakers usually run a 2-3% overround, while recreational ones can sit at 5-7% or higher. The lower the vig, the better the odds you get.