Roulette is one of the most iconic and visually thrilling games available on any casino floor.

The variation you decide to play has a massive impact on your mathematical chances of walking away a winner.

The Extra Number That Changes Everything

On a European table, the presence of the single zero is what prevents the even-money bets from being perfectly 50/50.

Conversely, the American layout adds an extra green slot—the double zero—significantly altering the math of the game.

• The payouts for hitting a single number are exactly the same (35 to 1) on both wheels
• Because the payouts are identical but the American wheel has an extra number, your odds of winning decrease
• You are taking on more risk for the exact same potential reward when playing the American version

The 'En Prison' and 'La Partage' Rules

Certain high-end European tables utilize the 'La Partage' rule, which further reduces the house advantage.

The 'En Prison' rule allows your even-money bet to remain 'in prison' for the next spin if a zero hits, giving you a second chance.

If you have the option, you should absolutely never sit down at an American roulette table.