Tools · Calculator

Odds Calculator

Probability, true odds and payout for any standard bet.

Bet

probability

1/37 · 2.70%

true odds against

36.00 : 1

casino pays

35 : 1

EV per $1

−$0.027

p(no win in 37 spins)

36.3%

p(≥1 win in 37 spins)

63.7%

Reading the result

A straight up covers 1 of 37 pockets. Fair odds would be 36.00 to 1; the casino pays 35 to 1. The gap is the 2.70% house edge, identical for every bet in the list.

Method and assumptions

European wheel, 37 equally likely pockets, independent spins. Payout rule 36/n − 1. Streak probabilities use (1 − p)ᵏ.