The Wheel

European roulette uses a single wheel with 37 numbered pockets: numbers 1 through 36 plus a single green zero. Numbers 1–36 are evenly split between red and black pockets. The zero belongs to neither — it's the house's pocket, and the source of the casino's edge.

The wheel is spun in one direction, the ball is launched in the opposite direction, and gravity does the rest. When the ball loses momentum, it drops into a pocket. That pocket determines every winner and loser at the table.

The Table Layout

The roulette table mirrors the wheel's numbers but arranges them in a 3×12 grid. Around the grid sit the outside bets: red/black, odd/even, high/low, dozens, and columns. Inside that grid, you can drop chips on individual numbers or on the lines between them.

How a Round Works

Bet Types & Payouts

Inside Bets

Outside Bets

The House Edge

On a European wheel, the house edge is a clean 2.70% on every bet. That number comes from the single zero: a true even-money bet would pay 36:36 odds, but you only get 35:36 in practice. American roulette adds a double zero and pushes the edge to 5.26% — which is why we don't bother with it here.

La Partage & En Prison

Some European tables soften the edge on even-money bets with La Partage (you get half your stake back when the ball lands on zero) or En Prison (your bet is "imprisoned" until the next spin). Both rules cut the house edge on those bets to roughly 1.35%.

Etiquette in a Real Casino

Practice Before You Play

The fastest way to absorb all of this is to play a few hands on our simulator. It's free, it's fast, and it'll teach you the rhythm of the game before a single dollar is on the line.