Roulette is one of the fastest casino games to learn how to play, because the entire outcome comes down to a single spin of the wheel. There’s no hand to build and no decision to make once your chips are placed — just a ball, a wheel, and a payout table. The part worth understanding well is the betting menu, since it’s wider than most beginners expect and the odds behind each bet type vary more than they look.
Roulette also has one detail that catches new players off guard: not every roulette wheel is the same, and the difference matters more than any betting strategy you’ll come across.
European vs. American Roulette Wheels
The core difference between the two versions is a single pocket.
- European roulette uses a wheel with 37 pockets: numbers 1 through 36, plus a single 0.
- American roulette uses a wheel with 38 pockets: numbers 1 through 36, plus both a 0 and a 00.
That extra 00 pocket doesn’t add a new betting option worth much — it simply increases the house edge. European roulette carries a house edge of about 2.7%, while American roulette’s extra pocket pushes that up to roughly 5.26%, nearly double. If both versions are available at a casino or online, European roulette is the mathematically better choice every time.
Inside Bets vs. Outside Bets
Every roulette bet falls into one of two families, and the difference between them is a straightforward trade-off between payout size and odds of winning.
Inside Bets
| Bet Type | Description | Payout |
|---|---|---|
| Straight up | A single number | 35:1 |
| Split | Two adjacent numbers | 17:1 |
| Street | Three numbers in a row | 11:1 |
| Corner | Four numbers meeting at a corner | 8:1 |
| Six line | Two adjacent streets (six numbers) | 5:1 |
Outside Bets
| Bet Type | Description | Payout |
|---|---|---|
| Red/Black | All numbers of one color | 1:1 |
| Odd/Even | All odd or all even numbers | 1:1 |
| High/Low | 1-18 or 19-36 | 1:1 |
| Dozen | A block of 12 numbers | 2:1 |
| Column | A vertical column of 12 numbers | 2:1 |
The pattern across both tables holds everywhere: the fewer numbers a bet covers, the higher it pays if it hits, and the lower the odds of it actually hitting.
Understanding the House Edge in Roulette
The house edge in roulette comes directly from the zero (and, on American wheels, the double zero). The payout odds on every bet are calculated as if the wheel only had the numbers 1 through 36, but the presence of the zero pocket(s) means the true odds of any bet winning are slightly worse than the payout suggests. That gap between the true odds and the payout odds is the house edge, and it applies equally to every bet type on the table.
Common Roulette Betting Systems
Betting systems are strategies for how to size your bets across a sequence of spins. It’s worth knowing what they actually do, because none of them change the house edge.
The Martingale System
The Martingale system doubles your bet after every loss on an even-money outside bet, on the theory that a single win eventually recovers all previous losses plus a small profit. It works in theory over a short run, but it carries real risk: a losing streak can escalate your bet size exponentially within a handful of spins, and table maximum limits or a depleted bankroll can stop you from doubling again before you’ve recovered your losses. A run of six consecutive losses on a $10 starting bet requires a $640 bet just to stay in the system.
The Fibonacci System
This system increases bets following the Fibonacci sequence (1, 1, 2, 3, 5, 8, 13…) after a loss, rather than doubling outright. It grows more slowly than Martingale, but it doesn’t remove the house edge either.
The D’Alembert System
D’Alembert increases your bet by one unit after a loss and decreases it by one unit after a win, a much gentler curve than Martingale. Like every other betting system, it can’t change the fixed mathematical edge built into the wheel.
None of these systems, or any variation on them, turn roulette into a winning game over time. They change how your losses and wins are distributed across a session, but the house edge is a property of the wheel and the payout table, not of your bet sizing.
Roulette Table Etiquette
- Place your bets before the dealer calls “no more bets,” after which no chips can be added, moved, or removed.
- Use casino chips specific to that table, if the table uses them — the dealer will exchange your chips for table-specific ones.
- Let the dealer clear the table and pay out winning bets before placing new chips for the next spin.
- Avoid reaching across the layout to place a bet for someone else without asking first.