Tools · Calculator

Calculator for Roulette Odds

Odds calculator for European roulette: probability, true odds and payout for any standard bet.

Bet

probability

1/37 · 2.70%

true odds against

36.00 : 1

wetin casino dey pay

35 : 1

EV for each $1

−$0.027

p(no win for 37 spins)

36.3%

p(≥1 win for 37 spins)

63.7%

How to read di result

Straight up dey cover 1 out of 37 pockets. Fair odds for be 36.00 to 1; di casino dey pay 35 to 1. Di gap na di 2.70% house edge, and e dey di same for every bet for di list.

Method and wetin we assume

European wheel, 37 pockets wey get equal chance, independent spins. Payout rule na 36/n − 1. Probability of streak dey use (1 − p)ᵏ.