No-vig calculator
Remove the margin from two-way or three-way prices to see the fair odds, the fair chance of each outcome and the margin.
Read as American odds: −110
Read as American odds: −110
Margin 4.8%: the prices add up to 104.8%.
| Outcome | Implied | Fair chance | Fair price |
|---|---|---|---|
| Outcome 1 | 52.4% | 50.0% | +1002.001/1 |
| Outcome 2 | 52.4% | 50.0% | +1002.001/1 |
The fair price spreads the margin across the outcomes in proportion to their implied probabilities.
How it works
Every sportsbook price carries a margin, also called the vig, juice or overround. Turn each price into the probability it implies and the probabilities add up to more than 100%: the excess is the margin.
Removing it means scaling each implied probability down so they add up to exactly 100%. Each scaled probability is a fair chance, and one divided by it is the fair price. This is the proportional method, the one the odds boards use for their fair column.
Enter every outcome of one market: both sides of a moneyline, spread or total, or home, draw and away in soccer. Prices from one book give that book’s margin; the best prices from several books give the margin left after comparing.
Worked example
A two-way market at −110 on both sides, the usual price on a point spread.
- −110 is 1.909 in decimal odds, an implied probability of 1 / 1.909 = 52.38%.
- Both sides together come to 104.76%. The 4.76% over 100% is the margin (the overround).
- Divide each side by the total: 52.38% / 104.76% = 50.00%, a fair chance for each side.
- The fair price is 1 / 0.5 = 2.00 (+100, evens).