Roulette is the most recognisable game in any casino — a spinning wheel, a bouncing ball, and a board full of numbers. It's also one of the easiest to play and one of the most misunderstood. Most of what decides whether roulette treats you well comes down to a single choice you make before you place a chip: which wheel you sit at. This guide covers the rules, every bet type, the payouts, and the one decision that halves the house edge. It's an informational guide, not financial advice.
How Roulette Works
The mechanics are simple. The croupier spins the wheel one way and rolls a ball the other. The ball eventually settles into a numbered pocket, and every bet covering that number wins at a fixed payout. Everything else loses. There's no skill in the spin itself and no way to influence where the ball lands — roulette is a game of pure probability, which is exactly why the wheel you choose matters so much.
You bet by placing chips on a numbered layout before the spin. Bets fall into two families: inside bets on specific numbers, and outside bets on large groups like red/black or odd/even. Inside bets are riskier with bigger payouts; outside bets win far more often for smaller returns.
The One Choice That Matters: European vs. American
Before anything else, look at how many zeros the wheel has. This single detail is the difference between a fair game and a bad one.
| Wheel | Pockets | Zeros | House edge |
|---|---|---|---|
| European | 37 | One (0) | 2.70% |
| American | 38 | Two (0 and 00) | 5.26% |
| French | 37 | One (0) + La Partage rule | 1.35% on even-money bets |
American roulette adds a second zero (00) but keeps the same payouts as European. That one extra pocket nearly doubles the house edge, from 2.70% to 5.26%. There is no upside for the player — same bets, same payouts, worse odds. Always choose European over American when both are available.
Better still, if you can find French roulette, take it. It uses the single-zero European wheel but adds the La Partage rule: when the ball lands on zero, you get half your even-money bet back instead of losing it all. That drops the house edge on those bets to just 1.35% — the best odds in the entire roulette family, and among the best of any casino game.
The Bets and Their Payouts
Here's every standard bet, from the longest odds to the safest.
| Bet | What it covers | Payout |
|---|---|---|
| Straight up | A single number | 35:1 |
| Split | Two adjacent numbers | 17:1 |
| Street | A row of three | 11:1 |
| Corner | Four numbers in a square | 8:1 |
| Line | Six numbers (two rows) | 5:1 |
| Column / Dozen | Twelve numbers | 2:1 |
| Red/Black, Odd/Even, High/Low | Eighteen numbers | 1:1 |
The maximum single-bet payout is 35:1 on a straight-up number. Notice the elegant con at the heart of roulette: a straight-up bet pays 35:1, but the true odds against you are 36:1 on a European wheel (37:1 on American). That gap is the house edge, and it's baked into every bet type equally — no bet is "smarter" than another in terms of edge. Outside bets don't lower the house edge; they just trade smaller wins for more frequent ones.
Betting Systems Don't Beat the Wheel
Roulette attracts more betting systems than any other game — the Martingale (double after every loss), the Fibonacci, the D'Alembert. They all share the same fatal flaw: because every spin is independent and the house edge never changes, no pattern of bet-sizing can turn a negative-expectation game positive. A system can reshape how your bankroll swings, but not whether the math favours you. We break down exactly why the most popular one fails in our guide to why the Martingale strategy doesn't work. Treat any "guaranteed" roulette system as a red flag.
Online Roulette vs. Live Dealer
Online you'll find two versions. RNG roulette is software — a random number generator decides each result, spins are instant, and stakes can be tiny. Live dealer roulette streams a real croupier spinning a real wheel, which many players prefer for the transparency of watching the ball actually drop. The odds are identical on the same wheel type; the difference is pace and atmosphere. Whichever you pick, the European-vs-American rule still decides your odds — check the wheel before you sit down.
Bankroll and Table Selection
Roulette's outside bets are relatively low-variance, while straight-up numbers are high-variance — you'll wait a long time between hits, but they pay big. If you want to understand that trade-off, our high vs. low volatility guide applies here too. Set a session budget, decide your stake size in advance, and never chase a losing streak by ballooning your bets. And because the casino itself matters as much as the table, start with our guide to choosing an online casino. If table games are your thing, you might also enjoy our guides to blackjack and craps.
FAQ
What's the difference between European and American roulette? European wheels have one zero and a 2.70% house edge; American wheels add a second zero (00), raising the edge to 5.26%. European is always the better choice.
What is the best bet in roulette? No bet has a lower house edge than another on the same wheel — they're all equal. The best odds come from playing French roulette with La Partage, which cuts the edge on even-money bets to 1.35%.
Does any roulette strategy actually work? No system can overcome the house edge, because every spin is independent. Strategies change how your bankroll rises and falls, not whether the game favours you long-term.
What does a straight-up bet pay? 35:1. It's the highest payout in roulette, placed on a single number, but also the least likely to hit.
Is live dealer roulette better than the software version? The odds are the same on an equivalent wheel. Live dealer offers a real croupier and visible wheel; RNG is faster and allows smaller stakes. It's a matter of preference.
Responsible gambling: You must be of legal gambling age where you live — 18 in Australia and in Alberta, Manitoba, and Quebec, and 19 in most other Canadian provinces. Roulette is entertainment, not an income; set a budget and never chase losses. If gambling is becoming a problem, free confidential help is available in Canada through ConnexOntario at 1-866-531-2600, and in Australia through Gambling Help Online at 1800 858 858. Know your limits, and play within them.