Roulette is one of the most recognizable casino games: a wheel, a ball, and a table full of numbers. It's simple to understand — guess where the ball lands — but behind that simplicity is precise math that determines exactly how big the house's edge is. This guide covers how to play, what each bet pays, the critical difference between European and American wheels, and why no system beats roulette long-term.
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Place your chips on the table before the dealer closes bets, the ball is spun on the wheel, and when it lands in a pocket, every bet covering that number is paid and the rest are collected.
The European wheel has 37 pockets (0–36). The American wheel has 38 (with an extra 00). That's the only rule difference — and it nearly doubles the house edge.
On European roulette a single-number bet pays 35:1, but your odds of hitting it are 1 in 37. That gap is the house edge: 2.70%. On American roulette, with 38 pockets, the edge rises to 5.26% — meaning for every $1,000 wagered, the house keeps $27 or $53 on average. Always prefer the European wheel (and even more so with a La Partage rule). More detail: house edge.
The wheel has no memory. After seven reds in a row, the odds of black on the next spin are exactly the same — this is the Gambler's Fallacy. Any doubling system like Martingale eventually breaks against table limits and a finite bankroll. Roulette has no skill component that improves your odds — unlike poker.
In online roulette, results come from a random number generator (RNG), while live casino uses a real physical wheel on stream. The math is identical in both cases; the difference is experience and pace.
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