Enter a bet's size, win chance, and payout to see its real long-run expected value.
e.g. enter 2 for 'pays 2x your bet', 35 for a straight-up roulette number
Expected value per bet
This is a long-run average across many bets, not a prediction for any single one. A negative EV means the house has the mathematical edge — true of nearly every casino bet, which is exactly why casinos are profitable businesses.