What is expected value (EV) in sports betting?
The short answer
The average amount you expect to win or lose per bet over time, given your estimated win probability and the offered price.
Watch the lesson
Play the Expected Value (EV) videoBetting strategy 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
Math that estimates whether a price is good or bad long-term — not a promise that today's bet wins.
What to remember about Expected Value (EV)
The definition
The average amount you expect to win or lose per bet over time, given your estimated win probability and the offered price.
In plain English
Math that estimates whether a price is good or bad long-term — not a promise that today's bet wins.
Example in context
At +120 with a $100 stake and 48% estimated win chance, EV ≈ +$5.60 per bet.
Check yourself
Term quiz
Check yourself: Expected value
1.Expected value measures…
2.At +120 with a 48% win estimate on $100, what is the EV?
3.A bet has positive EV and loses. What does that tell you?
Keep learning
Explore the next question before you place a bet.
- What is implied probability in sports betting?
- What is no-vig fair value in sports betting?
- What is an edge in sports betting?
- What is ROI (return on investment) in sports betting?
- What is an arbitrage / arb in sports betting?
- What does chasing mean in gambling?
- What is CLV (closing line value) in sports betting?
- What is a contrarian in sports betting?
Put the concept to work
Explore Expected Value (EV) 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).