What is no-vig fair value in sports betting?
The short answer
The estimated fair win probabilities (and fair odds) after removing the sportsbook's overround from a market.
Watch the lesson
Play the No-Vig Fair Value videoOdds and pricing guide
Knowing the language is step one — knowing the true price is the edge. The Cold Line’s signal desk tracks the no-vig fair number and the closing-line value behind terms like this, before the market moves.
In plain English
What the odds might look like if the book took no cut — a fair coin-flip split of the market's prices.
What to remember about No-Vig Fair Value
The definition
The estimated fair win probabilities (and fair odds) after removing the sportsbook's overround from a market.
In plain English
What the odds might look like if the book took no cut — a fair coin-flip split of the market's prices.
Example in context
Market −180 / +155 de-vigs to roughly 62.1% / 37.9% fair probabilities (proportional method).
Check yourself
Term quiz
Check yourself: No-vig fair value
1.No-vig fair value is…
2.A market of −180 / +155 implies 64.3% and 39.2%. What do you do next?
3.Why compare your estimate to the fair number rather than the posted price?
Keep learning
Explore the next question before you place a bet.
- What is implied probability in sports betting?
- What is an overround in sports betting?
- What is hold in sports betting?
- What is expected value (EV) in sports betting?
- What is vig / vigorish / juice in sports betting?
- What are american odds in sports betting?
- What is the closing line in sports betting?
- What are decimal odds in sports betting?
Put the concept to work
Explore No-Vig Fair Value with a concrete research workflow. Build your own number, compare sportsbook prices with a sharp reference, or use Audits to review timestamped book moves beside play-by-play.
Browse the full A–Z betting glossary or read the complete betting guide. The Cold Line also publishes a free year-round sports calendar and an odds board (Free account: delayed odds).