European Roulette Explained

European roulette is the standard single-zero form of the game: 37 pockets, one green zero, and a fixed structure found across online roulette in every major market. This page covers how the wheel and table are set up, what bet types are available and what each pays, how a round works from bet placement to settlement, and how European roulette compares structurally to American and French versions of the game. 

European roulette is available to play for free, with no deposit or account registration required. Free play uses virtual chips and produces no real-money outcomes. It is a useful way to observe the wheel layout, work through the bet types on the table, and see how each round resolves before playing with real money. 

European roulette uses a wheel with 37 pockets. Numbers 1 to 36 are split evenly between red and black (18 of each), and a single green zero (0) occupies the remaining pocket. That zero is the structural feature that distinguishes European roulette from American roulette, which adds a second zero pocket (00) to reach 38 pockets total.

In terms of wheel structure, European roulette and French roulette are identical. Both use 37 pockets with a single zero. The difference between them lies in the rules applied to even-money bets when zero lands. European roulette has no such special rule; French roulette adds La Partage or En Prison.

European roulette is one of the main formats covered in the Roulette Hub. For a full comparison across all main variants, see roulette variants. Unfamiliar terms used on this page are defined in the roulette glossary. 

The 37 pockets are not laid out in numerical order around the wheel. The sequence is deliberately distributed so that high and low numbers alternate, and red and black alternate, as closely as possible around the rim. The arrangement is a fixed property of the wheel design, not a pattern that influences outcomes.

The number sequence clockwise from the zero pocket is: 

Each spin is an independent event. The sequence of numbers on the wheel does not create predictable patterns in outcomes.

The betting table is divided into two main areas. The inside area contains the number grid, where players place bets on individual numbers or small combinations. The outside area surrounds the grid with clearly labelled zones for broader bets covering colours, ranges, and groupings.

Inside area structure:

• Numbers 1 to 36 arranged in three columns of 12 rows
• A single zero (0) at the top of the grid
• Inside bets are placed directly on numbers or on the lines between them

Outside area structure:

• Dozen zones: 1st 12, 2nd 12, 3rd 12 (covering 1-12, 13-24, 25-36 respectively)
• Column zones along the bottom of the grid
• Red/Black, Odd/Even, and 1-18/19-36 zones in the outer margin

For a detailed walkthrough of how each table area functions during a round, see the how to play roulette guide. Definitions of inside bets and outside bets are in the roulette glossary. 

A round of European roulette follows the same sequence every time. The three stages below describe that sequence in the context of online play.

Step 1: Bets are placed

The betting window opens. Players position chips on the table to indicate their chosen bets. Multiple bets may be placed in a single round, across the inside and outside areas of the table.

Step 2: The wheel spins

The betting window closes. The ball is released onto the spinning wheel. As the wheel slows, the ball drops from the track and comes to rest in one of the 37 pockets. The result is random.

Step 3: Outcome is resolved

The winning pocket number is identified. All bets covering that number are paid at the rates shown in the payout tables below. All other bets are cleared. The next betting window opens.

For a more detailed step-by-step guide covering chip placement, bet types, and table etiquette, see the full how to play roulette guide. 

Every bet in European roulette falls into one of two categories based on where it is placed on the table. The tables below list all available bet types, the number of pockets each covers, and the payout if it wins.

Inside bets

Inside bets cover one to six numbers. They pay at higher ratios because they cover fewer pockets. The Trio bet is specific to single-zero roulette and has two valid combinations. 

Outside bets

Outside bets cover 12 or 18 numbers. The zero pocket is not included in any outside bet. If zero lands, all outside bets lose. 

For a deeper explanation of how each payout ratio is derived from the wheel structure, see roulette odds and payouts. 

Every spin produces one outcome from 37 equally possible results. Payout ratios are set by the rules of the game and do not change between rounds or between online providers.

How the zero pocket affects payouts

The single zero creates the gap between true odds and payouts. A straight-up bet has a 1 in 37 chance of winning. The true odds are therefore 36:1. The game pays 35:1. That one-unit difference, multiplied across all bets and all spins, is the source of the house edge.

European roulette's RTP is 97.3%, which is the structural consequence of having 37 pockets with a single zero. It applies to the game as a whole over a large volume of play, not to any individual session.

Two principles apply to every spin in European roulette regardless of what has happened previously:

• Fixed payouts: the ratio for every bet type is constant. A 35:1 payout on a straight-up bet does not change based on recent results.
• Independent events: each spin has no connection to previous spins. A number that has not appeared in the last 20 rounds is not more likely to appear on the next spin.

For full detail on odds and house edge across all bet types and variants, see roulette odds and payouts. 

European, American, and French roulette share the same core game structure but differ in wheel composition and, in the case of French roulette, the rules applied to even-money bets when zero lands. The comparison below covers the key structural differences. 

European and French roulette share the same 37-pocket wheel. The difference is in what happens when the zero lands: French roulette returns half the stake (La Partage) or holds the bet for the next spin (En Prison) on even-money bets, while European roulette has no equivalent rule. American roulette uses a 38-pocket wheel, which changes the number of possible outcomes per spin.

For a full breakdown of all available formats, see roulette variants. Details on the French variant's specific rules are on the French roulette page. 

Free European roulette is available above with no deposit or registration required. Demo play uses virtual chips, so there are no real-money outcomes in either direction. It is a practical way to observe how the wheel sequence, table grid, and bet types function together before moving to a real-money environment.

Additional free roulette games, including American and French variants, are available on the free roulette page. 

Answers to common questions about European roulette structure and mechanics.

European roulette is defined by its structure: a single zero, 37 pockets, and fixed payout ratios that apply consistently across every round. The wheel determines outcomes; no bet type, sequence, or system changes that. Understanding the structure of the wheel and table, what bet types are available, and what each pays is the foundation for engaging with the game.

For further reading, the roulette strategy page covers session and game selection concepts. The full range of variants is covered on roulette variants.