American Vs European Roulette Explained
The iconic roulette wheel is perhaps the most recognizable symbol of casino gambling worldwide. Although the core concept —betting on where the white ball stops— never changes, not all roulette wheels are identical. The casino world features two main versions that dominate the casino floors: the US version and the European wheel. Understanding the critical differences between these wheels is incredibly important for anyone trying to protect their bankroll.
The Green Zeroes: The One Massive Difference
The most significant difference between the two games is the number of green pockets. The classic European layout contains 37 numbers: the numbers 1 through 36, plus a single green zero (0). In stark contrast, the American Roulette wheel features 38 total pockets. It features the standard 36 numbers, the single green zero (0), plus a devastating extra pocket: the double zero. This tiny physical difference might not look like a big deal to a casual tourist, but statistically, it ruins the math for the player.
The Mathematical Consequence on the House Edge
In this game, the payouts are strictly designed as if there were only 36 numbers. For instance, a winning straight-up bet returns 35 times your bet, on both the American and European tables. Because the European wheel only has one green slot, the casino's built-in mathematical advantage is a very reasonable 2.70%. However, because the double zero wheel adds that second green slot while keeping the exact same 35 to 1 payout, the casino's advantage skyrockets to exactly 5.26%.
Always look for the single zero if both are available. It makes no sense to accept worse odds.
The 'Five Number Bet' is unique to the US wheel and carries a horrendous house edge, with a massive 7.89 percent margin.
Some European tables feature the La Partage rule, which reduces the casino margin on even-money bets down to an incredible 1.35%.
The Ultimate Breakdown: The Tale of the Tape
To make the difference completely clear, take a look at the comparison table below. It breaks down the exact reason why pros always prefer the single zero wheel.
Game AspectEuro LayoutUS Layout
Number of Slots37 (1-36 plus 0)38
Zero SlotsOne (0)2
Casino Advantage2.7%High at 5.26%
Best Odds1.35%Always 5.26%
The bottom line is simple, the American wheel's extra slot is nothing more than a casino trick to double their profits 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 primary strategy must always be choosing the 37-pocket wheel. Refusing to play the American version is the simplest method to mathematically improve your winning probabilities.