A roulette table looks dense at first glance, but every spot on it exists for one reason: to let you wager on where a small ball will land on a spinning wheel. The wheel itself carries either 37 or 38 numbered pockets, and the printed table layout mirrors those numbers while adding grouped betting areas. The count of spots you can physically place a chip on is larger than the wheel's pocket count, because the layout includes sections for broad categories of bets, not just individual numbers.
The Wheel Defines the Core Spots
Every roulette wheel has numbered pockets arranged in a sequence designed to alternate red and black, with numbers running from 0 to 36. The zero pocket is green. A European wheel has a single zero, giving it 37 pockets in total. An American wheel adds a double zero, bringing the total to 38 pockets. These two versions account for nearly every roulette table you will encounter, and the extra pocket is the single most important difference between them.
The numbers on the wheel are not in numerical order around the rim. The arrangement is fixed by wheel type, and the ball can land in any pocket on any spin. The wheel's pocket count is what determines the base odds of a straight-up bet on a single number: one winning pocket out of 37 on a European wheel, one out of 38 on an American wheel.
The Betting Layout and Its Spots
The printed cloth or screen in front of the wheel is the betting layout. It contains a spot for each individual number, plus a set of surrounding areas for grouped bets. The individual number spots are arranged in three columns of twelve rows, running 1 through 36, with the zero or zeros positioned at the top of the columns. Each number spot is typically coloured red or black to match its pocket on the wheel, while the zero spots are green.
Beyond the 37 or 38 individual number spots, the layout includes marked sections for outside bets. These are the larger areas around and below the number grid. They do not represent additional wheel pockets; they represent groups of numbers you can bet on with a single chip. The outside betting areas include red, black, odd, even, low (1-18), high (19-36), the three dozens, and the three columns. On an American layout, there is also a spot for the five-number bet covering 0, 00, 1, 2, and 3.
So the total number of chip placement spots on a table is the sum of the individual number spots plus the grouped betting areas. On a European table, that is 37 number spots plus the outside sections. On an American table, it is 38 number spots plus the outside sections and the five-number bet area. The exact count of grouped spots can vary slightly by table design, but the individual number spots are fixed by the wheel type.
How the Spots Translate to Bets
Each spot or group of spots corresponds to a bet type with its own payout and its own house edge. The house edge is the mathematical advantage the operator holds on a given game, expressed as a percentage of each wager. House edge and RTP are complements: they sum to 100% for the same game. In roulette, the zero pockets are what create the house edge, because they are not covered by the even-money outside bets like red or black.
A straight-up bet on a single number pays 35 to 1, but the true odds against hitting that number are 36 to 1 on a European wheel and 37 to 1 on an American wheel. The gap between the payout odds and the true odds is the house edge. The same principle applies to every bet on the table: the payout is slightly short of what the true odds would require, and the zero pockets are the reason.
European and American Layouts Compared
The wheel type changes the house edge on every bet, not just the straight-up number bet. The extra double zero on an American wheel means the house keeps a larger share of each wager over the long run. Here is how the two layouts differ on the main bet types:
| Bet type | European wheel (37 pockets) | American wheel (38 pockets) |
|---|---|---|
| Straight-up (one number) | Pays 35 to 1 | Pays 35 to 1 |
| Split (two numbers) | Pays 17 to 1 | Pays 17 to 1 |
| Street (three numbers) | Pays 11 to 1 | Pays 11 to 1 |
| Corner (four numbers) | Pays 8 to 1 | Pays 8 to 1 |
| Six line (six numbers) | Pays 5 to 1 | Pays 5 to 1 |
| Dozen or column (twelve numbers) | Pays 2 to 1 | Pays 2 to 1 |
| Red, black, odd, even, low, high | Pays 1 to 1 | Pays 1 to 1 |
| Five-number bet (0, 00, 1, 2, 3) | Not available | Pays 6 to 1 |
The payouts are identical between the two wheel types for the bets that exist on both. What changes is the probability of winning, because the American wheel has one additional losing pocket for every bet. The five-number bet is unique to the American layout and carries a higher house edge than any other bet on that table, because it covers only five numbers but pays as if the true odds were better than they are.
What Each Decision Point Means
Playing roulette involves fewer decisions than most table games, but each one matters. The first decision is which wheel to play. If a venue offers both European and American roulette, the European wheel gives the house a smaller edge on every bet. The difference is structural, not a matter of luck or timing.
The second decision is which bet or combination of bets to place. A straight-up bet has a low probability of winning but a large payout. An even-money bet like red or black wins close to half the time on a European wheel, but pays only 1 to 1. The choice changes the shape of your session: more frequent small outcomes or rarer large ones. It does not change the long-run expectation, which stays negative on every bet.
The third decision is how much to wager per spin and how long to stay at the table. Roulette is a fast game, and the house edge applies to every wager. A player who makes more bets per hour exposes more total money to that edge. Session length and bet size are the two variables most directly under a player's control.
The Sequence of a Round
A round of roulette moves through a fixed sequence. The dealer opens betting, and players place chips on the layout. Each player uses chips of a distinct colour at a land-based table, so the dealer can tell whose bet is whose when multiple people bet on the same spots. Online, the interface tracks each player's bets separately.
When betting closes, the dealer spins the wheel in one direction and sends the ball travelling in the opposite direction. The ball loses momentum and falls into a pocket. The dealer marks the winning number on the layout, clears losing bets, and pays winning bets according to the payout for that bet type. The next round begins when the dealer opens betting again.
At a land-based table, you buy in by placing cash on the layout. The dealer converts it into roulette chips. These chips have no denomination printed on them; their value is set at the table and recorded by the dealer. When you leave, you must exchange roulette chips for regular casino chips at that table, because roulette chips are not valid at other tables or at the cashier.
Procedural Mistakes New Players Make
One common mistake is reaching for chips after the dealer has called no more bets. Once the ball is in motion and the dealer closes betting, any chip placed on the layout is a late bet and will be returned or disallowed. The timing is set by the dealer, not by the player's sense of when the ball will land.
Another mistake is assuming that a number is more likely because it has not appeared recently. The wheel has no memory. Each spin is an independent event, and the probability of any given number appearing is the same on every spin, regardless of the sequence of previous outcomes. The pockets do not become due, hot, or loose.
A third mistake is confusing the payout odds with the true odds. A straight-up bet pays 35 to 1, which sounds generous, but the true odds against winning are 36 to 1 or 37 to 1 depending on the wheel. The gap is the house edge, and it is built into the payout structure. No betting pattern changes it.
Where the Table Rules Are Posted
The minimum and maximum bet for a table are posted on a sign at the table or shown in the online game's information panel. The wheel type is visible on the wheel itself: a European wheel has one green zero, an American wheel has two. The payout for each bet type is printed on the layout or available in the game's rules screen. These are the documents that carry the specific numbers for the table you are playing, and they are the ones to read before you place a chip.
FAQ
Does the number of spots on the table change the odds?
The number of spots on the betting layout does not change the odds. What changes the odds is the number of pockets on the wheel. A European wheel has 37 pockets, an American wheel has 38, and the extra pocket increases the house edge on every bet. The layout simply gives you places to put chips.
Why does the American wheel have a five-number bet but the European wheel does not?
The five-number bet covers 0, 00, 1, 2, and 3. It only exists on American layouts because it requires a double zero. The bet pays 6 to 1, but the true odds against winning are worse than that, making it the highest-edge bet on the table. European layouts have no double zero, so the bet cannot exist there.
Can I bet on more than one spot at the same time?
Yes. You can place chips on any number of spots before the dealer closes betting. Each chip represents a separate bet with its own payout and its own probability. Betting on multiple spots does not change the house edge on any individual bet; it changes how your total wager is distributed across outcomes.
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