🔍 No-Vig Calculator
Calculate true probabilities and fair odds by removing bookmaker margin.
Calculator Settings
Odds Format
Number of Selections
Selection 1
Selection 2
Results
Market Margin
0%
| Selection | No Vig Odds | EV % | Kelly % |
|---|---|---|---|
| Selection 1 | - | - | - |
| Selection 2 | - | - | - |
About No-Vig Calculator
The No-Vig Calculator removes bookmaker margin (vigorish) from betting odds to reveal true implied probabilities and fair odds.
What is Vigorish?
Vigorish (or margin) is the bookmaker's commission built into odds. It ensures they make a profit regardless of outcome. By removing the vig, you can see the true implied probabilities and compare them to your own assessments to find value bets.
How to Use This Calculator
- Select odds format (Decimal/American/Fractional)
- Choose number of selections (2-8)
- Enter odds for each selection
- Optionally enter bookmaker odds to calculate EV and Kelly %
- Review the fair odds and market margin
Understanding Results
- Market Margin: Total margin in the odds (bookmaker's edge)
- No Vig Odds: Fair odds after removing margin
- EV %: Expected value vs bookmaker odds
- Kelly %: Optimal stake using Kelly Criterion
Formula
Fair Probability = (Implied Probability) / (Sum of Implied Probabilities)
Fair Odds = 1 / Fair Probability