Betting Calculators
No-Vig Calculator
Remove the bookmaker's margin to find fair odds. See what the odds would be without the bookmaker's built-in profit margin.
How to Use This Calculator
- Select your odds format (Decimal, Fractional, or American)
- Enter the bookmaker’s odds for each outcome in an event
- Add or remove outcomes as needed
- See the fair odds (without vig), fair probabilities, and the bookmaker’s overround
The overround shows how much extra probability the bookmaker has built 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 is the vig or juice?
The vig (vigorish) or juice is the bookmaker’s built-in margin. It ensures the bookmaker profits regardless of the outcome. It’s the difference between total implied probabilities and 100%.
What are fair odds?
Fair odds are what the odds would be if the bookmaker had zero margin. They represent the true market-implied probabilities of each outcome.
How much vig is normal?
Sharp bookmakers typically have 2-3% overround, while recreational bookmakers may have 5-7% or more. Lower vig means better odds for bettors.