The Wheel You Sit Down To
You walk up to a roulette table, and the first thing you see is a wheel with colored pockets running around its rim. On an American layout, that wheel has 38 pockets in total. The numbers run from 0 to 36, which gives you 37 pockets, and then there is one more: a second zero, printed as 00. That double zero is the defining feature of the American wheel, and it is the reason every bet on this layout carries a different rate of loss than the same bet on a single-zero wheel.
The pockets are not arranged in numerical order. They alternate red and black around the wheel, while the 0 and 00 pockets sit in green. The numbers are positioned to spread high and low, odd and even, red and black as evenly as the wheel geometry allows. The table layout next to the wheel mirrors the bets you can make, but the wheel itself is what decides the outcome: a ball is spun in the opposite direction to the wheel's rotation, loses momentum, and settles into one of the 38 pockets.
Knowing the pocket count matters because every payout in roulette is built as if the wheel had 36 pockets. The house keeps its edge because the wheel has more than 36. On an American wheel, it has two extra pockets, and that gap between the payout odds and the true odds is where the operator's mathematical advantage lives.
What Each Pocket Means for Your Bet
Roulette bets are settled against the pocket the ball lands in, and every wager on the layout is a prediction about which pocket or group of pockets that will be. A straight-up bet on a single number pays 35 to 1. If the wheel had 36 pockets and you bet one number, a 35-to-1 payout would make the bet fair: over 36 spins you would expect to win once and lose 35 times, breaking even. The American wheel has 38 pockets, so over 38 spins you still expect to win once and lose 37 times. The payout has not changed, but the true odds have.
The same logic applies to every other bet on the layout. A split bet covers two numbers and pays 17 to 1. A street covers three numbers and pays 11 to 1. A corner covers four and pays 8 to 1. A dozen or column bet covers 12 numbers and pays 2 to 1. The even-money bets—red or black, odd or even, 1-18 or 19-36—each cover 18 numbers and pay 1 to 1. On a 38-pocket wheel, every one of those bets loses a little faster than it would on a 37-pocket wheel, because the two green zeros sit outside every red, black, odd, even, high and low wager.
| Bet type | Pockets covered | Standard payout | What the double zero changes |
|---|---|---|---|
| Straight-up | 1 | 35 to 1 | True odds are 37 to 1 against, not 35 to 1 |
| Split | 2 | 17 to 1 | True odds are 18 to 1 against |
| Street | 3 | 11 to 1 | True odds are 35 to 3 against |
| Corner | 4 | 8 to 1 | True odds are 34 to 4 against |
| Dozen / column | 12 | 2 to 1 | True odds are 26 to 12 against |
| Even-money (red, black, odd, even, high, low) | 18 | 1 to 1 | True odds are 20 to 18 against; two green pockets sit outside the bet |
None of this means one bet is a way to win. It means the rate of expected loss differs by bet type, and on an American wheel every bet carries a larger built-in edge than the equivalent bet on a single-zero wheel. The extra pocket is not a cosmetic difference; it is the single most important fact about the layout.
Sitting Down: Buy-In, Chips and the Sequence of a Round
At a live table, you do not play with the chips you use at other games. Roulette chips are color-coded to each player, so the dealer can tell whose bet is whose when a dozen hands reach the layout at once. You buy in by placing cash on the table—never directly into the dealer's hand—and the dealer gives you a stack of roulette chips at a value you agree on. Each player's chips are a different color, and they have no value away from that specific table. When you leave, you exchange them back for standard casino chips or cash at the same table.
A round follows a fixed sequence. The dealer opens betting, and players place chips on the layout. You can bet a single number, a group of numbers, or several groups at once. When the dealer calls an end to betting, the ball is already spinning. From that moment, no one may touch the layout. The ball drops into a pocket, the dealer places a marker on the winning number, and losing bets are cleared first. Winning bets are then paid, and only after the marker is removed may players place bets for the next round.
The most common procedural mistake new players make is reaching for the layout after the dealer has called no more bets. Even if you are only adjusting your own chip, the rule is absolute: once betting closes, hands off. A second mistake is playing with chips from another table or assuming your colored roulette chips have their face value in the cashier's line. They do not; they are table-specific and must be converted before you walk away. A third is stacking a bet on a line between two numbers and assuming it covers both. A chip must sit fully inside the marked area for the bet you intend; a chip straddling a line may be interpreted as a different wager or returned to you.
Decision Points: What You Control
Roulette has no decisions after the ball is released. The only choices you make are which bets to place, how much to stake on each, and when to stop. That makes it a game of bet selection rather than skill. The wheel has no memory: a number that has appeared five times in a row is no more or less likely on the next spin than any other number. Each spin is an independent event, and the 38 pockets remain 38 pockets no matter what the display board of past results shows.
What differs between bets is the house edge and the shape of the outcomes. A straight-up bet has a larger house edge than an even-money bet on the same wheel, but it also pays a much larger multiple when it lands. A player who wants a long session with many small results will experience roulette very differently from a player who puts the same total stake on a few single numbers. Neither approach changes the long-run expectation; both are negative-expectation bets on an American wheel, and the only variable under your control is how the losses are distributed across time.
Some American tables offer a rule variation called surrender, where an even-money bet loses only half its stake when the ball lands in 0 or 00. Where that rule is in force, it reduces the house edge on those even-money bets, but it does not change the wheel. The rule is printed on the table, and you should read it before you buy in, because it applies only to specific bets and only on tables that offer it.
American and European Wheels Side by Side
If you have a choice of tables, the structural difference between the two common wheel types is the most useful thing to know before you sit down. A European wheel has 37 pockets: the numbers 1 through 36 plus a single zero. An American wheel has 38: the same numbers plus a zero and a double zero. The payouts are identical on both layouts. The extra pocket on the American wheel means every bet on it carries a higher house edge than the same bet on a European wheel.
| Feature | American wheel | European wheel |
|---|---|---|
| Pockets | 38 | 37 |
| Zero pockets | 0 and 00 | 0 only |
| Straight-up payout | 35 to 1 | 35 to 1 |
| Even-money payout | 1 to 1 | 1 to 1 |
| House edge on even-money bets | Higher, because two green pockets sit outside the bet | Lower, because one green pocket sits outside the bet |
| Surrender rule | Offered at some tables; printed on the layout | Typically not part of the standard layout |
The table above does not attach a percentage to either wheel because the exact house edge depends on the rule set in force at the table you are playing. The structural point is fixed: for the same bet under the same rules, the American wheel's second zero pocket makes the bet lose faster in expectation. If you are choosing between two tables, the wheel type is one of the few things that changes your expected rate of loss before you place a single chip.
Reading the Table Before You Play
Every roulette table carries its own terms, and the layout itself is the best source for them. The minimum and maximum bet are posted on a placard at the table. The payout for each bet is printed on the layout. Any rule variation, such as surrender, is printed there as well. If you are playing an online version, the same information appears in the game's information panel or rules page, and the wheel type is usually stated in the game title or help screen.
Your job before the first spin is to confirm three things: which wheel you are on, what the table minimum is, and whether any rule variation applies to the bets you intend to make. Those three facts determine what the game will cost you per spin and how the payouts will be settled. Everything after that is the wheel doing what a wheel does.
FAQ
Why does the American wheel have a double zero?
The double zero is a design variant that adds a 38th pocket to the wheel. Its effect is to increase the house edge on every bet compared with a single-zero wheel, because the payouts remain based on 36 numbers while the wheel now has 38 possible outcomes.
Are the numbers on an American wheel in the same order as a European wheel?
No. The two wheel types use different number sequences around the rim. The American layout places the 0 and 00 opposite each other, and the arrangement of the other numbers differs from the European sequence. The pocket count and the presence of the double zero matter for odds; the exact sequence does not change any bet's expectation.
Does betting on both zero and double zero change the house edge?
Betting on 0 and 00 together is a split bet covering two numbers, and it carries the same structure as any other two-number split on an American wheel. It does not neutralize the extra pocket; it simply makes the two green pockets the numbers you are betting on, with the standard split payout and the same built-in edge as any other split bet.
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