No-vig calculator: the fair line under the juice
Enter both sides of any two-way market — moneyline, spread, total — and see what the market actually believes once the book's margin comes out. American (−110, +200) or decimal (1.91) odds both work.
Enter both sides to see the fair market.
How it works
Each price implies a probability (1 ÷ decimal odds). Both sides of a market sum past 100% — the excess is the book's margin. The multiplicative method divides each implied probability by that sum, restoring a true 100% market: the fair probabilities, and the fair lines they convert back to. Sharper methods (power, Shin) shade longshots differently, but multiplicative is the standard first cut.
Frequently asked questions
How do you calculate a no-vig line?
Convert both sides' odds to implied probabilities; they'll sum to more than 100%. Divide each by that sum (the multiplicative method) to get fair probabilities, then convert back to odds. A -110/-110 market is really 50/50 — the implied probabilities sum to 104.76%, a 4.76% overround.
Why does the fair line matter?
It's the market's true opinion with the book's cut removed. If one book's price on a side beats the fair line implied by a sharper market, that bet is +EV against consensus — the entire basis of line shopping.
Standard formulas on numbers you provide — not betting advice. 21+ where applicable. Gambling problem? Call 1‑800‑GAMBLER.