American Vs European Roulette Explained

The spinning roulette wheel is perhaps the most recognizable symbol of casino gambling worldwide. While the basic premise of the game —guessing where a small ball will land— never changes, not all tables are created equal. The casino world features two main versions that dominate the casino floors: the US version and the European wheel. Learning the mathematical distinctions between these two formats is the most vital step for anyone trying to protect their bankroll.

The Green Zeroes: How One Pocket Changes Everything

The primary physical distinction between the two games is the number of green pockets. A traditional European Roulette wheel features 37 total pockets: numbers one to thirty-six, and one single green zero. On the other hand, the US variation contains 38 spaces. It includes the standard 36 numbers, a single zero, and an additional green pocket: the 00. This single extra pocket might seem insignificant to a casual tourist, but statistically, it ruins the math for the player.

The Mathematical Consequence Ruins Player Profitability

In roulette, the winning odds paid are calculated on a 36-number wheel. For instance, hitting a single number always pays 35 to 1, regardless of which version you play. Because the single zero table has 37 total slots, the casino's built-in mathematical advantage is exactly 2.70 percent. But, because the double zero wheel adds a second guaranteed losing pocket for outside bets (the 00) but pays the same odds, the casino's advantage skyrockets to exactly 5.26%.


Never play the American wheel if both are available. There is zero benefit to accept worse odds.
The 0-00-1-2-3 wager is unique to the US wheel and is the absolute worst bet, carrying an edge of 7.89%.
Specific Euro tables use the En Prison mechanic, which reduces the casino margin on red/black wagers to a tiny 1.35%.

A Quick Comparison: American vs European

To summarize the mathematics, take a look at the detailed table. It breaks down the exact reason why pros always actively seek out the French or Euro games.


FeatureSingle Zero WheelDouble Zero Wheel
Spaces on WheelThirty-Seven38 (1-36 plus 0 and 00)
Green Pockets1Two (0 and 00)
Casino Advantage2.7%5.26%
Lowest Possible Edge (with La Partage)1.35%5.26% (Rule does not apply)


The bottom line is simple, the extra 00 pocket is nothing more than a casino trick to drain your bankroll faster from uninformed players. Whether you are placing bets at a lavish casino in Las Vegas or spinning the wheel at an online casino from your smartphone, your first goal must always be locating a single zero game. Refusing to play the American version is the easiest and most effective way to instantly double your long-term returns.