Tools · Calculator

Roulette Odds Calculator

A European roulette 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.