Online Roulette: European vs American Wheels & Odds

Online Roulette Explained

Roulette is one of the most recognisable casino games in the world, and it translates beautifully to the online screen. The rules are simple enough to learn in a couple of minutes, yet the range of bets, odds and variations gives it real depth. This guide is written for players in Luxembourg who want to understand exactly how the game works before they place a euro — from the crucial difference between European and American wheels to the maths behind each bet and how live-dealer tables recreate the casino floor.

Because online gambling in Luxembourg is a state monopoly run by the Loterie Nationale, most players who look for a wider choice of tables end up at internationally licensed operators that accept Luxembourg residents. That makes it especially important to understand licensing, fair odds and responsible play — all of which we cover below.

What you’re actually betting on

At its core, roulette is a bet on where a small ball will land after a spinning wheel comes to rest. The wheel is divided into numbered pockets, and a betting layout lets you wager on individual numbers, groups of numbers, colours, or odd/even outcomes. The dealer (or the software’s random number generator) spins, the ball drops, and winning bets are paid according to fixed odds.

Everything interesting about the game comes down to one thing: how many pockets are on the wheel, and how the payouts compare to the true probability of winning.

European vs American Roulette

The single most important decision you make in roulette happens before you place a bet — choosing the wheel. The two dominant formats are European and American, and they are not equal.

The zero is everything

A European wheel has 37 pockets: the numbers 1 to 36 plus a single green zero (0). An American wheel has 38 pockets: the numbers 1 to 36 plus a zero (0) and a double zero (00).

That extra pocket might look trivial, but it doubles the “house edge” — the built-in mathematical advantage the casino holds over the long run.

Feature	European Roulette	American Roulette
Total pockets	37	38
Green pockets	Single zero (0)	Zero (0) + double zero (00)
House edge	~2.70%	~5.26%
Straight-up payout	35:1	35:1
Best for players	Yes	No

Notice that the payout for a single-number bet is 35:1 on both wheels — but the American wheel has an extra losing pocket. That’s precisely why the American house edge is almost double. All else being equal, always choose European (or French) roulette when it’s available.

French roulette and the rules that help you

You’ll also find French roulette, which uses the same single-zero wheel as the European version but adds player-friendly rules on even-money bets. The two you’ll see are:

• La Partage — if the ball lands on zero, you lose only half your even-money stake.
• En Prison — your even-money bet is “imprisoned” for one more spin instead of being lost immediately.

Either rule roughly halves the effective house edge on even-money bets (red/black, odd/even, high/low), making French roulette the most favourable common variant when those rules apply.

Common Roulette Bets and Odds

Roulette bets fall into two broad families: inside bets placed on specific numbers, and outside bets placed on large groups. Inside bets pay more but hit less often; outside bets pay less but land more frequently.

Inside bets

These are placed directly on the numbers or on the lines between them.

Bet	Covers	Payout
Straight-up	1 number	35:1
Split	2 adjacent numbers	17:1
Street	3 numbers (a row)	11:1
Corner	4 numbers	8:1
Line (six-line)	6 numbers	5:1

The straight-up bet is the classic high-risk play. On a European wheel your true chance of hitting a single number is 1 in 37, but the payout is only 35:1 — that gap is the house edge in action.

Outside bets

Outside bets cover larger sections of the layout and are where most cautious players spend their time.

• Red / Black, Odd / Even, High (19–36) / Low (1–18) — even-money bets paying 1:1. On a European wheel each wins on 18 of 37 pockets.
• Dozens — bet on the 1st (1–12), 2nd (13–24) or 3rd (25–36) group of twelve numbers. Pays 2:1.
• Columns — bet on one of the three vertical columns of twelve numbers. Pays 2:1.

Because the green zero belongs to none of the outside groups, no outside bet is ever a true 50/50 or true 1-in-3 — the zero is the reason the house always keeps its edge.

Call bets and racetrack bets

Many online European and French tables include a “racetrack” — an oval representation of the wheel that lets you place announced (call) bets covering neighbours on the physical wheel rather than the layout. Common ones include Voisins du Zéro, Tiers du Cylindre and Orphelins. These don’t change the odds; they’re simply a faster way to cover sections of the wheel.

RTP and the House Edge

If you play online slots, you’ll be familiar with RTP (Return to Player). Roulette works the same way, just expressed differently.

How RTP relates to house edge

RTP and house edge are two sides of the same coin. A European wheel with a 2.70% house edge has an RTP of roughly 97.30%. An American wheel with a 5.26% edge has an RTP of about 94.74%.

Wheel	House edge	Approx. RTP
French (La Partage, even-money)	~1.35%	~98.65%
European (single zero)	~2.70%	~97.30%
American (double zero)	~5.26%	~94.74%

Over thousands of spins, a lower house edge means your bankroll lasts longer. This is why the choice of wheel matters far more than any betting “system.”

Betting systems and the reality check

You’ll see systems like the Martingale (doubling after a loss) promoted everywhere. They can produce short winning streaks, but no betting pattern changes the underlying odds — each spin is independent, and table limits plus your own bankroll eventually cap how far you can chase. Treat systems as a way to structure your fun, not as a route to guaranteed profit.

Live Roulette Online

For many players, live-dealer roulette is the best of both worlds: a real wheel, a real croupier and real-time streaming, played from home.

How live roulette works

Instead of a random number generator, a live casino game streams a physical wheel and dealer from a studio. You place bets through the on-screen interface within a countdown, the dealer spins, and cameras plus sensors capture and confirm the result. It’s the same maths as digital roulette — the wheel choice and odds still decide your edge — but with a more social, authentic feel.

Studios and game variety

The live-casino space is dominated by a handful of specialist studios. Evolution is the biggest name, offering everything from standard European tables to game-show-style formats. Pragmatic Play also runs a strong live portfolio, while NetEnt and Play’n GO are better known for their RNG slots and table games.

Alongside roulette you’ll typically find live blackjack, baccarat and a growing menu of game shows — hybrid entertainment titles that borrow the roulette-style spinning wheel. If you prefer chasing big prize pools, jackpot slots are a separate category worth exploring, though they carry very different odds to table games.

Lightning and multiplier formats

Popular variants such as “Lightning” roulette add random multipliers to straight-up numbers each round. These can boost a single-number win dramatically, but the trade-off is a slightly higher house edge on those bets to fund the multipliers — always check the game’s information panel for the specific RTP before playing.

Choosing a Safe Operator

Since Luxembourg’s regulated online market is limited to the Loterie Nationale, players who want a broad roulette selection generally use operators licensed abroad. Knowing what those licences mean is essential.

The four licensing frameworks you’ll meet

Not all licences offer the same level of oversight and player protection. Broadly, you’ll encounter four:

Authority	Strictness	Player protection
Malta Gaming Authority (MGA)	High	Strong — strict rules, complaint channels, game testing
Curaçao	Moderate	Reformed framework, but historically lighter oversight
Anjouan	Lower	More permissive, limited player recourse
Kahnawake	Lower–moderate	Long-established but less rigorous than MGA

The MGA is generally regarded as the gold standard among these for accountability and dispute resolution. Curaçao is extremely common and has been overhauling its regime. Anjouan and Kahnawake are more permissive and increasingly used, but tend to offer weaker safeguards if a dispute arises. When comparing sites, favour stricter licensing, transparent RTP information and clear terms.

Bonuses: read the fine print

Casino promotions are shown to Luxembourg players in euros (€). Be careful to distinguish a sports welcome offer from a casino offer — they have different terms. Any casino bonus that can be used on roulette usually carries restrictions: table games often contribute only a small percentage (sometimes 0%) toward wagering requirements. Always read the terms before assuming a bonus helps at the roulette table.

Responsible Gambling

Roulette is designed to be entertaining, and every spin carries a built-in house edge — over time, the odds favour the operator. Set a budget you can comfortably afford to lose, treat any winnings as a bonus rather than an expectation, and never chase losses.

All licensed operators must be 18+, and reputable sites provide tools such as deposit limits, session reminders, cooling-off periods and self-exclusion. If gambling stops being fun or starts to feel like a problem, take a break and seek support. You can find free, confidential help and self-assessment tools at BeGambleAware.org.

Play smart: choose a European or French wheel, understand the odds before you bet, stick to your limits, and enjoy the game for what it is — entertainment.