European Roulette: Single-Zero Rules and Layout

European roulette conventionally uses a wheel with 37 pockets: numbers 1–36 and a single zero. The name describes the format, not where a game is played. This guide explains the standard layout and the rules needed to interpret its mathematical return.

The Single-Zero Wheel

The most critical distinction of European Roulette is its wheel composition. Unlike the American version, which contains both a 0 and a 00, the European wheel features only 37 pockets: numbers 1 through 36 and a single green zero (0).

With conventional payouts and no special zero concession, the house edge is approximately 2.70%. The conventional double-zero comparison is approximately 5.26% for most bets. Both figures represent a negative expected return for the bettor; neither guarantees how long a balance lasts.

Understanding the Table Layout

The European table is designed for clarity. The betting area is divided into two primary sections: the inside and the outside.

Inside Bets

Inside bets involve placing chips on specific numbers or small clusters of numbers within the grid.

• Straight Up: Betting on a single number. Under conventional payouts, this pays 35:1.
• Split: Placing a chip on the line between two adjacent numbers, paying 17:1.
• Street: A bet on a row of three numbers, paying 11:1.
• Corner: A wager on four numbers that meet at an intersection, paying 8:1.
• Six Line: Covering two adjacent rows (six numbers), paying 5:1.

Outside Bets

Outside bets cover larger groups and pay smaller profit ratios. A higher winning frequency does not imply a protected balance or positive expected return.

• Red or Black: An even-money bet paying 1:1.
• Odd or Even: Another even-money bet paying 1:1.
• High or Low (1-18 / 19-36): Pays 1:1.
• Dozens and Columns: These cover 12 numbers each and pay 2:1.

Advanced “Call Bets” and the Racetrack

A unique feature often found in premium European Roulette games is the Racetrack. This is an oval-shaped betting area that mimics the physical layout of the numbers on the wheel itself, rather than the numerical order on the table. This allows players to place “Announced” or “Call” bets:

• Voisins du Zéro (Neighbors of Zero): Covers the 17 numbers closest to the zero.
• Tiers du Cylindre (Thirds of the Wheel): Covers the 12 numbers opposite the zero.
• Orphelins (Orphans): Covers the remaining eight numbers not included in the above two categories.
• Neighbor Bets: Allows you to bet on a specific number and the numbers immediately adjacent to it on the wheel.

European Roulette vs. American Roulette

For a fair wheel, red occupies 18 pockets in either format. Its probability differs because the total pocket counts differ:

• European Probability: 48.65%
• American Probability: 47.37%

The difference is approximately 1.28 percentage points, not a guarantee of any particular session outcome. The American five-number basket includes 00 and has no identical counterpart on a single-zero wheel.

The Logic of the Zero

Zero does not belong to red/black, odd/even, high/low, dozens or columns for settlement. Those conventional bets lose on zero unless a specific concession applies. La Partage returns half of a qualifying even-money stake on zero, reducing that bet’s house edge to approximately 1.35%. It does not apply to all wager types or eliminate the possibility of losses.

Wheel Order Is Different from Grid Order

Numbers adjacent on the racetrack follow the wheel sequence, while numbers adjacent on the rectangular layout form different groups. A recent cluster on one sector is not proof of a biased wheel or a prediction of the next independent spin. Announced groupings also contain multiple component stakes, so their full cost must be counted.

Presentation and Canadian Context

An animated wheel, live stream or mobile interface can use the same single-zero rules. Its graphics, pace or language do not establish the payout schedule, testing history or provincial availability. A dollar sign alone does not identify CAD stakes.

Compare American roulette, French roulette zero rules, and roulette probability calculations. The inside and outside bet guide explains layout coverage and combined-stake accounting.

Explore the full section: roulette variations.