The first thing you notice: one zero, not two
Walk up to a European roulette table and the most important visual detail is also the smallest. The wheel carries a single green pocket marked 0. An American layout adds a second green pocket marked 00, which changes the arithmetic of every bet on the table. European roulette has 37 pockets in total, numbered 0 through 36. The betting cloth, where you place your chips, mirrors that same set of numbers plus a series of boxes around the outside for group wagers.
The wheel and the cloth are two views of the same information. The wheel shows the physical pockets where the ball can land. The cloth shows every way you can stake money on where it will land. Learning to read the board means learning how those two views connect.
Layout of the wheel
The numbers on a European wheel are not arranged in numerical order. They are distributed around the circumference in a fixed sequence designed so that high and low numbers, red and black, odd and even alternate as evenly as possible. The zero sits in its own green pocket, and red and black alternate around the wheel with only the zero breaking the pattern.
You do not need to memorise the sequence to play. What matters is the count: 37 pockets, one of them zero. Every payout on the table is built from that count. A straight-up bet on a single number pays 35 to 1, not 36 to 1 or 37 to 1, and that one-unit shortfall is the house edge expressed in payout terms.
Layout of the betting cloth
The cloth is divided into two broad zones. The inner zone is a grid of the numbers 1 through 36 arranged in three columns of twelve rows, with the zero usually sitting alone at the top of the grid. The outer zone surrounds that grid with boxes labelled for broader categories: red, black, odd, even, low numbers, high numbers, and three column boxes at the foot of the grid.
Each box on the cloth corresponds to a set of winning numbers. A chip placed on a single number wins only if the ball lands in that pocket. A chip placed on red wins if the ball lands in any red pocket. The board makes those relationships visible: the closer a chip sits to a single number, the narrower the bet; the further out it sits, the broader the coverage.
Inside bets: the numbered grid
Inside bets are wagers placed on the numbered grid itself or on the lines that divide it. They cover small groups of numbers and pay at longer odds. The main inside bets are:
- Straight-up: a chip placed fully inside one number's box, covering that number alone.
- Split: a chip placed on the line between two adjacent numbers, covering both.
- Street: a chip placed at the end of a row of three numbers, covering all three.
- Corner: a chip placed where four numbers meet, covering all four.
- Six line: a chip placed at the junction of two rows, covering six numbers.
Each of these bets pays less as it covers more numbers, but the house edge stays the same on a European wheel because the payout is always calculated as if the zero did not exist. The zero is the house's number: it is not red, not black, not odd, not even, not high, not low. When the ball lands in zero, every inside bet and most outside bets lose.
Outside bets: the surrounding boxes
Outside bets sit around the grid and cover large categories of numbers. They pay closer to even money and hit more often, which makes them the slower, steadier side of the board. The standard outside bets are red or black, odd or even, low (1-18) or high (19-36), dozens (1-12, 13-24, 25-36), and columns (the three vertical columns of twelve numbers each).
On a European layout, the zero defeats every outside bet. A chip on red loses on zero just as it loses on black. That single green pocket is what gives the house its edge on the even-money bets, and it is the reason the European layout is a materially different game from the American one.
How the two wheel types compare
The difference between European and American roulette is not cosmetic. It is a structural difference in the number of pockets, and it changes the expected rate of loss on every bet on the table.
| Feature | European wheel | American wheel |
|---|---|---|
| Pockets | 37 | 38 |
| Zero pockets | One (0) | Two (0 and 00) |
| Effect on any single-number bet | One losing pocket out of 37 | Two losing pockets out of 38 |
| Effect on red/black or odd/even | Zero defeats the bet | Both zeros defeat the bet |
| House edge on the same bet | Lower | Higher |
The table does not give percentages because the exact house edge depends on the bet and the rule set in use. The structural point holds regardless: the extra pocket on the American layout increases the house edge on every wager, and the European board is the one with the single zero.
Sequence of a round
A round of roulette moves through a fixed sequence, and most of it happens before the ball is released. First, players place chips on the cloth during the betting window. The dealer then sends the ball around the wheel in the opposite direction to the wheel's spin, and at some point the dealer calls an end to betting, typically with a phrase or a hand gesture. From that moment no chips may be placed or moved.
The ball loses momentum, drops into a pocket, and the dealer marks the winning number on the cloth with a marker. Losing bets are cleared first, then winning bets are paid. Only after the marker is removed does the next betting window open. The entire cycle repeats, and the rhythm of the table is built around that clear separation between betting time and settlement time.
What each decision point means
Roulette has no decisions after the ball is released. Every choice you make happens before the spin, and each choice is a trade between coverage and payout. A straight-up bet on one number pays 35 to 1 but loses on 36 of the 37 pockets. A bet on red covers 18 pockets and pays even money, but loses on the 19 pockets that are black or zero.
There is no bet that covers all 37 pockets at a profit. Covering every number would cost 37 units and return 36 units on the winning straight-up bet, a guaranteed loss of one unit no matter where the ball lands. That one-unit gap is the same structural shortfall that appears in every payout on the table, and it is why no combination of bets removes the house edge.
Procedural mistakes new players make
The most common mistakes at a roulette table are procedural rather than strategic. First, players place chips after the dealer has called an end to betting. A late bet is void, and a chip placed on a settled number after the ball has dropped will be returned or treated as a dispute. Watch the dealer's call and the marker on the cloth.
Second, players touch or move chips after the winning number is marked. Once the marker is down, the layout is frozen. Moving a losing chip onto a winning number is treated as an attempt to alter a settled bet, and venues take that seriously. Third, players stack chips in ambiguous positions so the dealer cannot tell whether a bet is a split or a straight-up. Place each bet clearly inside its box or on its line, and let the dealer confirm anything that sits across a boundary.
Fourth, players assume the zero is a neutral outcome. On most bets it is not. If you have money on red and the ball lands in zero, the bet loses. The zero is a number like any other, and it belongs to the house on every bet that does not specifically include it.
Strategy charts and rule sets
Roulette does not have a strategy chart in the way blackjack does, because there is no decision to make after the bet is placed. What varies between tables is the rule set: whether the wheel has one zero or two, whether a rule such as la partage or en prison applies to even-money bets when zero appears, and how the venue handles those situations. Any published payout table or edge calculation derives from the exact rule set in use, and a chart written for one wheel type does not transfer to the other.
When you sit down, read the table's posted rules or ask the dealer which wheel type is in play and whether any zero-related rules apply. That single piece of information changes the expected rate of loss on every bet you can place, and it is printed or announced at every properly run table.
FAQ
Why does the European board have a zero at all?
The zero is the pocket that creates the gap between the true odds of a number appearing and the payout the table offers. A straight-up bet on one number pays 35 to 1, but there are 37 pockets, so the payout is short by one unit. The zero is the physical representation of that shortfall, and it is the reason the house holds an edge on every bet that does not include it.
Do the numbers on the cloth match the wheel order?
No. The cloth arranges the numbers 1 through 36 in a neat three-column grid for easy betting, while the wheel distributes them around the circumference in a fixed alternating sequence. The two layouts serve different purposes: the cloth groups numbers for wagering, and the wheel separates them for physical randomness. A number's position on the cloth tells you nothing about where it sits on the wheel.
What is the difference between a column bet and a dozen bet?
Both cover twelve numbers, but they select them differently. A column bet covers one of the three vertical columns on the cloth, each containing twelve numbers that are not consecutive. A dozen bet covers the consecutive ranges 1-12, 13-24, or 25-36. Both pay 2 to 1 on a European layout, and both lose when the ball lands in zero.
Gambling involves risk. Please play responsibly. If you or someone you know has a gambling problem, call the helpline printed in the footer below.
Play responsibly
Gambling should be treated as paid entertainment, never as a way to earn income or recover losses. 1-800-MY-RESET (1-800-697-3738)
18+ or 21+ depending on where you are; follow the minimum age that applies to you.
This article is general information about how these mechanics work. It is not legal advice and not a recommendation to gamble or to use any particular operator. Availability and legality differ by jurisdiction — check the rules that apply where you are.