No-Vig Calculator
Calculate the no-vig fair odds and true implied probability for sports bets. Strips juice margins from American bookmaker odds.
Interactive Calculator
1. Provide Details
2. Output Results
How to Calculate: Formula & Steps
Converts American odds to decimal rates, calculates the combined overround (vig), and normalizes individual probabilities to find the 'fair' odds.
Fair Probability = Implied Probability ÷ Total Implied ProbabilitiesStep-by-Step Calculation Example
Odds of -110 (52.38% probability) and +110 (47.62% probability) sum to 100%. If both are -110 (52.38% each), the sum is 104.76%. Removing the 4.76% vig gives a fair probability of 50.00% and fair odds of +100.
Common Mistakes to Avoid
- Entering fractional or decimal odds. This calculator is designed specifically for American odds format (e.g. -110, +150).
Practical Use Cases
- Hedging and arbitrage calculation
- Expected value (+EV) betting audits
- Removing sportsbook overround
Expert Tips
- A lower vig percentage indicates a more competitive market with better pricing for bettors.
Frequently Asked Questions About No-Vig Calculator
What is 'vig' in sports betting?
Vig (short for vigorish, juice, or margin) is the fee the sportsbook charges for taking a bet. It is built directly into the odds.
How does a no-vig calculator help?
It allows you to compare different sportsbooks' odds against a 'fair' baseline, helping you identify positive expected value (+EV) opportunities.
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