Roulette wheels come in different versions, and the number of pockets depends on which type you’re playing. A European roulette wheel has 37 numbers (0-36), while an American wheel has 38 numbers because it includes an extra double zero pocket. Some rare versions even have 39 numbers with a triple zero, though you won’t find these at most casinos.
The difference between wheel types might seem small, but it affects your odds every time you play. That extra pocket on an American wheel increases the house edge and changes how certain betting strategies work. Understanding these differences helps you make better choices about which game to play.
You’ll learn exactly how the numbers are laid out on each wheel type and why it matters for your gameplay. We’ll break down the specific number arrangements and explain how they influence your chances of winning.
Number Breakdown on a Roulette Wheel
European wheels contain 37 numbered pockets while American wheels have 38, with the extra double zero pocket being the key difference that affects your odds at the table.
Total Numbers on European Roulette
The European roulette wheel features 37 total pockets. These include numbers 1 through 36, plus a single green zero pocket.
The numbered pockets from 1 to 36 alternate between red and black colors. Eighteen pockets are red and eighteen are black. The zero pocket stands alone in green, making it distinct from all other numbers on the wheel.
When you play European roulette, you face better odds than the American version because of this single zero. The house edge sits at 2.7%, which is lower than what you’ll find on American tables. The numbers are arranged in a specific sequence around the wheel that doesn’t follow numerical order.
Total Numbers on American Roulette
American roulette wheels contain 38 pockets. You’ll find numbers 1 through 36, a single zero, and an additional double zero pocket.
Like the European wheel, the numbers 1 to 36 split evenly between red and black. You get 18 red numbers and 18 black numbers. Both the zero and double zero appear in green.
The extra double zero pocket increases the house edge to 5.26%. This means you have slightly lower chances of winning on each spin compared to European roulette. The double zero sits directly opposite the single zero on the wheel layout.
Comparison of European and American Layouts
Number of Pockets:
- European: 37 pockets
- American: 38 pockets
House Edge:
- European: 2.7%
- American: 5.26%
The main difference between these two layouts is that single extra pocket. American wheels add the double zero, which nearly doubles the house advantage. Both versions use the same 36 numbered pockets split between red and black.
Your betting options remain similar on both wheels, but your odds of winning shift with that extra pocket. If you bet on a single number in European roulette, you have a 1 in 37 chance of winning. On an American wheel, those odds drop to 1 in 38.
Significance of Roulette Numbers
The numbers on a roulette wheel directly affect your odds of winning and how much the casino keeps over time. The presence of zero pockets and the total count of numbers shape every aspect of the game.
Role of Zero and Double Zero
The zero pockets are what give the casino its advantage in roulette. European wheels have one green zero pocket, while American wheels have both a zero and a double zero. These green pockets don’t count as odd, even, red, or black.
When you place an outside bet like red or black, you might think you have a 50/50 chance. But the zero pockets change those odds. If the ball lands on zero or double zero, you lose most standard bets.
The double zero on American wheels increases the casino’s edge significantly. You’re playing against 38 possible outcomes instead of 37. This extra pocket doesn’t pay you any differently, but it reduces your chances of winning on every spin.
Impact on Betting Options
The total number of pockets determines what bets you can make at the table. You can bet on individual numbers, groups of numbers, or characteristics like color and odd/even. Each betting option has different odds based on how many numbers it covers.
Common bet types include:
- Single numbers (straight up)
- Two adjacent numbers (split)
- Three numbers in a row (street)
- Four numbers in a square (corner)
- Columns of 12 numbers
- Dozens (1-12, 13-24, 25-36)
The more numbers your bet covers, the higher your chance of winning but the lower your payout.
House Edge Differences
The house edge is the mathematical advantage the casino has on every bet. European roulette has a house edge of 2.7% because of its single zero. American roulette has a 5.26% house edge due to the double zero.
This difference matters more than you might think. Over 100 spins betting $10 each, you’d expect to lose $27 on a European wheel versus $53 on an American wheel. The American wheel costs you nearly double in the long run.