What is implied probability in sports betting?
The short answer
The win chance baked into American (or other) odds, before removing the book's hold. Posted two-way probabilities often sum above 100% because of vig.
Watch the lesson
Play the Implied Probability 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 percent chance the price says this side has. −110 ≈ 52.4%; +150 ≈ 40%.
What to remember about Implied Probability
The definition
The win chance baked into American (or other) odds, before removing the book's hold. Posted two-way probabilities often sum above 100% because of vig.
In plain English
What percent chance the price says this side has. −110 ≈ 52.4%; +150 ≈ 40%.
Example in context
−150 = 60.0% implied probability; +130 ≈ 43.48% implied probability.
Check yourself
Term quiz
Check yourself: Implied probability
1.Implied probability is…
2.Convert −150 to an implied probability.
3.Why do the two sides of a market usually add up to more than 100%?
Keep learning
Explore the next question before you place a bet.
- What is vig / vigorish / juice in sports betting?
- What are american odds in sports betting?
- What is no-vig fair value in sports betting?
- What is expected value (EV) in sports betting?
- What is an overround in sports betting?
- What is the closing line in sports betting?
- What are decimal odds in sports betting?
- What is a dime in sports betting?
Put the concept to work
Explore Implied Probability 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).