No-Vig Calculator
Remove the bookmaker's margin (vig) to find true probabilities and fair odds. Our free no-vig calculator helps you identify value bets by showing what the odds would be without the bookmaker's built-in advantage. No registration required.
Use the free calculator below to find true probabilities.
No-Vig Calculator
Best Sportsbooks for Betting in 2026
How It Works
Bookmakers build a margin (vigorish) into their odds to guarantee profit. The no-vig calculator removes this margin to show you the true probabilities and fair odds.
How No-Vig is Calculated:
First, calculate implied probabilities:
Implied Prob1 = 1 / Odds1
Implied Prob2 = 1 / Odds2
Total Implied Prob = Implied Prob1 + Implied Prob2
Then remove the vig:
True Prob1 = Implied Prob1 / Total Implied Prob
True Prob2 = Implied Prob2 / Total Implied Prob
Calculate fair odds:
Fair Odds1 = 1 / True Prob1
Fair Odds2 = 1 / True Prob2
Example:
If you have odds of 2.10 and 1.90:
- Implied Prob1 = 1/2.10 = 0.476 (47.6%)
- Implied Prob2 = 1/1.90 = 0.526 (52.6%)
- Total = 1.002 (100.2% - 0.2% is the vig)
- True Prob1 = 0.476 / 1.002 = 0.475 (47.5%)
- True Prob2 = 0.526 / 1.002 = 0.525 (52.5%)
- Fair Odds1 = 1/0.475 = 2.11
- Fair Odds2 = 1/0.525 = 1.90
No-Vig Calculator Examples
Real-world examples of removing bookmaker margin to find true probabilities.
Example 1: 2-Way Market
Example 2: 3-Way Market
Example 3: High Margin Market
How to Use the No-Vig Calculator
Enter Odds
Enter the decimal odds for each outcome in the market. For 2-way markets, enter two odds. For 3-way markets, click "+ Add Third Outcome" and enter three odds.
View Results
The calculator automatically removes the bookmaker margin and shows true probabilities and fair odds in real-time.
Analyze Margin
Check the bookmaker margin percentage. Lower margins mean better value. Compare fair odds with other bookmakers to find value bets.
How the No-Vig Calculator Works
The no-vig calculator removes the bookmaker's built-in margin to reveal true probabilities and fair odds.
Formula:
Implied Probability = 1 / Decimal Odds
Total Implied Probability = Sum of all Implied Probabilities
Bookmaker Margin = (Total Implied Probability - 1) × 100%
Removing the Vig:
True Probability = Implied Probability / Total Implied Probability
Fair Odds = 1 / True Probability
Understanding Margin:
- Typical margins range from 2-5% for major sports
- Lower margins = better value for bettors
- Margins above 5% are considered high
- Fair odds show what the odds would be without the bookmaker's advantage
Example: Odds of 2.10 and 1.90 have a 0.2% margin. After removing vig, true probabilities are 47.5% and 52.5%, with fair odds of 2.11 and 1.90.
Frequently Asked Questions
Vig (vigorish) or margin is the bookmaker's built-in profit margin. It's the difference between the true probabilities and the implied probabilities shown in the odds.
Removing the vig shows you the true probabilities and fair odds, helping you identify value bets and compare odds across different bookmakers more accurately.
Margins of 2-4% are considered good for major sports. Margins above 5% are high and reduce value for bettors. Lower margins mean better value.
Yes, click "+ Add Third Outcome" to add a third set of odds for 3-way markets like soccer match results (Win/Draw/Lose).
Compare the fair odds with odds from other bookmakers. If another bookmaker offers odds higher than the fair odds, you've found a value bet.
Yes, our no-vig calculator is completely free to use. No registration required, no hidden fees.