Expected Value Calculator

Calculate expected value from odds, stake, and your estimated win probability.

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Expected value check
(0.52×$110.00)(0.48×$100.00)=$9.20{\normalsize (0.52 \times \$110.00) - (0.48 \times \$100.00) = \$9.20}
This is positive expected value based on your probability estimate.
Expected value summary
Expected value$9.20
EV per stake9.20%
Fair odds1.92

Frequently Asked Questions

How do you calculate expected value in betting?+

Multiply your profit if the bet wins by your estimated win probability, then subtract the expected loss from losing outcomes. Positive EV means the price is above your estimated fair value. Read the Positive EV guide.

What probability should I enter?+

Enter your estimated true win probability for the selection. The calculator compares that probability with the bookmaker odds to estimate expected value.

Is positive EV guaranteed profit?+

No. Positive EV is a long-term expectation, not a guarantee on a single bet. Results can still vary significantly in the short term.