FREE SPORTS BETTING TOOL
Expected value
calculator.
Compare a sportsbook price with your own win-probability estimate. The result is math—not a promise.
$
40.00% implied probability
%
Your estimate—not a prediction from EVBet EXPECTED VALUE+$12.50
Positive EV based on your estimate
POTENTIAL PROFIT$150.00
TOTAL PAYOUT$250.00
EV ROI12.50%
BREAK-EVEN40.00%
Break-even40.00%
Your estimate45.00%
0%
100%
At +150 odds and a 45% estimated win probability, a $100 bet has an expected value of $12.50 over many equivalent wagers.
HOW TO READ THE RESULT
EV measures the decision,
not the next outcome.
A positive result means your probability estimate is high enough to beat the break-even percentage at the listed odds. It does not mean the bet will win. Your result is only as reliable as your probability estimate.