Free calculator

Expected Value (+EV) Calculator

Estimate the long-term profit of a bet given your true probability estimate vs the sportsbook's odds.

True probability (0–1)

Decimal odds

Stake ($)

EV $

$10.00

EV %

10.00%

Implied probability

50.0%

What this means

EV is the average outcome of your bet if you placed it infinite times. A positive EV means the sportsbook's odds imply a probability lower than yours — bet it. A negative EV means the sportsbook is overpricing the outcome — skip it. The implied probability is what the bookmaker's odds suggest before margin.

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