No Vig Odds Calculator FAQ

Vig (short for vigorish) is the bookmaker's built-in margin that ensures they profit regardless of the outcome. It appears as odds that don't sum to 100% implied probability. For example, if both sides of a -110 / -110 moneyline are implied at 52.38% each, the total is 104.76%—the extra 4.76% is the vig.

Convert all odds to implied probabilities, sum them, then divide each probability by the total. The result is the true probability without the bookmaker's margin. The calculator does this instantly—just enter the posted odds and the no-vig probabilities and fair odds appear automatically.

No vig means the odds have been adjusted to remove the bookmaker's margin, showing the fair market price for each outcome as if the bookmaker took no cut. These are the true odds you would see in a zero-margin market, which helps you assess whether a bet has positive expected value.

Yes. If the total implied probability is less than 100%, it indicates an arbitrage opportunity where you can bet on all outcomes and guarantee a profit. The calculator highlights this with an alert and shows your arbitrage edge percentage so you can evaluate the opportunity quickly.

American (+150, -200), Decimal (2.50), and Fractional (3/2). The calculator can also auto-detect the format when you paste odds, so you can mix formats if needed and it will normalize everything for the analysis.

Yes. The math is the same regardless of sport. Use it for NFL, NBA, MLB, soccer, tennis, or any market with 2 or 3 outcomes. The calculator handles point spreads, moneylines, totals, and three-way soccer odds equally well.

Arbitrage opportunities are short-lived—often minutes or seconds. If you are actively looking, check odds across multiple sportsbooks frequently using this calculator alongside odds comparison tools. The calculator's share feature lets you save a snapshot of a line for later review.