Free tools
Check a bet's expected value
in one number.
Expected value is what a bet wins or loses on average if you placed it again and again. Enter the odds, your honest chance it wins and your stake. We show the answer in dollars.
Expected Value Calculator
Free · No sign-up
—
EV = (win% × profit) − (lose% × stake). "Your chance vs price" compares your chance with the chance the price gives. Above zero means the price pays more than it should.
Not sure of your chance?
Our model has one.
Our model gives each game its own chance to win and checks it against the price. The free picks show the price and what $10 returns. No card needed.
How to read
your result
01
Enter the price
Type the odds you would take and pick the format: decimal, American or fractional.
02
Add your chance
Your honest guess of how often this wins. The fair price from a no-vig calculator is a good place to start.
03
Check the verdict
Positive means the price pays more than your chance says it should. The bigger the number, the better the price.
Worked example · the default above
Odds 2.10 · win chance 50% · stake $100
EV = 0.50 × $110 profit − 0.50 × $100 stake
EV = +$5.00 (+5.0% of stake)
The price gives a 47.6% chance. Yours is 50%, so the price pays more than it should.
Expected value:
quick answers
What is positive EV?
A bet that comes out ahead on average if you placed it many times. The price you get matters more than how often you win.
How do I get my win chance?
Start with the fair price from a no-vig calculator, or a model you trust. If your chance is higher than the chance the fair price gives, the bet has positive EV.
For information and entertainment only. BetBetter is not a bookmaker and does not take bets. 18+ · Gamble responsibly — get support.