No-Vig Calculator
Remove the bookmaker margin from two-way American odds. Enter both sides to see fair implied probabilities and no-vig lines.
FAQ for this calculator
- What is vig?
- Bookmaker overround—implied probs sum above 100%; vig is that excess.
- American odds format?
- Negative = favorite (stake to win 100); positive = underdog (win on 100 stake).
- Three-way markets?
- This tool is two-way only—soccer 1X2 needs three inputs.
- Guaranteed profit?
- No—fair odds are theoretical; books adjust lines and limit winners.
How to use the no-vig calculator
Convert each American line to implied probability, normalize to sum to 100%, convert back to fair American odds.
- Enter both sides of a two-way market.
- Tap Remove vig.
- Compare fair odds to posted lines.
When to use this calculator
- Checking -110/-110 juice (often ~4.5% vig).
- Finding fair price on a moneyline underdog.
- Arbitrage sanity check between books.
Examples & walkthrough
- -110 / -110 → fair lines near -105 each, ~4.5% vig.
- +150 / -180 → normalized fair probs differ from raw implied.