The Wheel and the Table Are Two Halves of One Game
The casino game with a ball and a spinning table is roulette. The word comes from the French for 'little wheel', and the game is exactly that: a dealer sends a small ball travelling around a recessed, spinning wheel while players bet on where it will land. The table beside the wheel is not a separate game. It is a printed betting map that mirrors the wheel's numbers, and every chip placed on that map is a prediction about the ball's final resting pocket.
Roulette is a game of pure chance. No decision a player makes after the ball is released changes where it lands, and no pattern of previous results changes the odds of the next spin. What a player does control is which bets they place, and that choice matters more than most newcomers realise, because different bets on the same table carry materially different built-in advantages for the house.
What You See When You Sit Down
A roulette table has two components. The wheel sits at one end, usually near the dealer. It contains numbered pockets arranged in a deliberate sequence around the rim, coloured red and black, with green pockets reserved for zero. The betting layout is a printed felt rectangle where the same numbers appear in a grid, with additional sections for outside bets. Players place chips on the layout, not on the wheel itself.
Two wheel configurations dominate. A European wheel has 37 pockets: the numbers 0 through 36, with a single green zero. An American wheel has 38 pockets: the same numbers plus a second green pocket marked double zero. The extra pocket changes the mathematics of every bet on that layout, and it is the first thing a player should check because it changes which table is the better place to put the same wager.
| Feature | European wheel | American wheel |
|---|---|---|
| Pockets | 37 | 38 |
| Zero pockets | One (single zero) | Two (single and double zero) |
| Number range | 0-36 | 0-36 |
| Effect on house edge | Lower for equivalent bets | Higher because of the extra pocket |
The table's printed layout also tells you which bets are available. Some tables show additional sections for announced bets, which are combinations placed verbally rather than chip by chip. Those options vary by venue and by the table's rule set, so the felt itself is the authoritative guide to what a given table accepts.
From Buy-In to Settlement: How a Round Works
A round of roulette follows a fixed sequence. First, the dealer opens betting. Players place chips on the layout, and this window stays open while the wheel is stationary or spinning slowly. At some point the dealer announces that no more bets may be placed, usually with a phrase like 'no more bets' or a hand gesture. From that moment, nothing on the layout can be touched.
The dealer then releases the ball in the opposite direction to the wheel's spin. The ball travels around the outer track, loses momentum, and drops into one of the numbered pockets. The dealer marks the winning number on the layout, clears all losing chips, and pays winning bets according to the table's posted odds. The next round begins when the dealer reopens betting.
Buying in is straightforward. A player places cash on the table, and the dealer exchanges it for roulette chips. Roulette chips are often a distinct colour per player so that bets on the same number can be told apart. These chips have no value away from that table and must be exchanged back for regular casino chips or cash before leaving.
Inside Bets: Small Groups, Bigger Payouts
Bets on the numbered grid itself are called inside bets. They cover a single number or a small group of adjacent numbers. Because they cover fewer outcomes, they pay more when they win, and they lose more often. The most direct is the straight-up bet: a chip placed entirely on one number. A chip on the line between two numbers is a split, covering both. A chip on the corner where four numbers meet covers all four.
Other inside bets cover larger sections of the layout. A street bet sits at the end of a row of three numbers and covers that row. A six-line bet sits at the junction of two rows and covers six numbers. Some layouts allow a basket bet on the zero section, though the exact composition of that bet differs between wheel types.
| Bet | What it covers | Where the chip goes | How often it tends to win |
|---|---|---|---|
| Straight-up | One number | Entirely inside the number's box | Least often |
| Split | Two adjacent numbers | On the line between them | More often than straight-up |
| Street | Three numbers in a row | On the outer edge of the row | More often than a split |
| Corner | Four numbers meeting at a corner | On the shared corner point | More often than a street |
| Six-line | Six numbers across two rows | On the junction of the two rows | More often than a corner |
None of these bets changes the house's mathematical advantage on the wheel itself. What changes is the shape of the outcome: a straight-up bet pays a larger multiple of the stake but wins rarely, while a six-line bet pays a smaller multiple and wins more often. The expected loss per unit wagered stays tied to the wheel's construction, not to which inside bet a player chooses.
Outside Bets: Larger Groups, Smaller Payouts
Outside bets sit on the sections around the numbered grid and cover broad categories of outcomes. Red or black covers all pockets of that colour. Odd or even covers all numbers of that parity. High or low covers the lower half or the upper half of the number range. Dozens cover twelve consecutive numbers each, and columns cover twelve numbers arranged vertically on the layout.
Outside bets win more frequently than inside bets and pay smaller multiples as a result. A red bet wins on any red pocket and loses on any black or green pocket. The green pockets are the key detail: they belong to neither red nor black, neither odd nor even, and typically neither high nor low as those bets are defined. That is the mechanism by which the wheel's zero pockets give the house its edge on those bets.
A player who wants fewer, more frequent outcomes will gravitate to outside bets. A player who wants a larger payout when a prediction lands will gravitate to inside bets. Both are valid ways to play the same wheel, and both carry the same structural disadvantage relative to the wheel's total number of pockets.
Where the House Edge Comes From
The house edge in roulette is built into the wheel, not added at settlement. A straight-up bet on a European wheel covers one pocket out of 37. If the bet paid at the true odds of 37 to 1, the operator would break even over time. It does not pay at true odds; it pays at a lower multiple, and the difference between the true odds and the posted payout is the house's edge on that bet. The same principle applies to every bet on the layout.
The American wheel's extra double-zero pocket widens that difference. The same bet covers one pocket out of 38 instead of one out of 37, while the posted payout stays the same. The player is not paid more for the reduced chance of winning, and the house's edge rises accordingly. This is why the wheel type matters more than any other single feature of the table.
House edge and return to player are complements: they sum to 100% for the same bet under the same rule set. If a bet carries a given house edge, the return to player is the remainder. That figure is a long-run statistical average over a very large number of spins, not a promise about any single session. A player can win on a given evening and still be playing a bet with a built-in house advantage.
Procedural Mistakes That Cost New Players
The first mistake is touching chips after the dealer closes betting. Once the no-more-bets call is made, any chip moved on the layout is a dispute waiting to happen, and venues take a dim view of it. The second is not knowing which chips belong to whom. Roulette chips are often colour-coded per player, and placing a chip on top of someone else's stack without the dealer's involvement creates ambiguity about whose bet it is.
The third mistake is assuming the last few spins predict the next one. Roulette outcomes are independent. A number that has appeared three times in a row is no more or less likely to appear on the next spin than any other number on the wheel. The wheel has no memory, and no betting pattern changes the built-in edge of the game.
Before sitting down, check the table's minimum and maximum bet, which are posted on a small sign at the table. Check which wheel type is in use. Check the payout schedule printed on the layout or available from the dealer. Those three pieces of information tell you more about the table than any amount of watching other players.
FAQ
Is the game with a ball and a spinning table the same as the game with a wheel of fortune?
No. Roulette uses a ball and a numbered wheel. A wheel of fortune is a different device, usually a large vertical wheel with pegs, where a pointer or flapper indicates the winning segment. They are separate games with separate rules.
Can a player bet after the ball is released?
No. Once the dealer announces that no more bets may be placed, the layout is closed. The announcement may come before or shortly after the ball is released, depending on the table, but the rule is the same: nothing on the layout can be touched after that point.
Do some roulette tables have different rules for the zero?
Yes. Some European tables apply a rule that returns part of a losing even-money bet when the ball lands on zero. Whether that rule applies is stated in the table's own rule set, and it changes the house edge on the affected bets. Check the posted rules or ask the dealer before relying on it.
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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.