iGaming Journalist & Crypto Casino Analyst
Roulette is the easiest casino game to play and one of the easiest to play badly. The rules take ninety seconds to learn, but the difference between the best and worst bets on the table is a factor of more than two in house edge — and most players never notice.
Quick answer: European roulette carries a 2.70% house edge on every standard bet because of its single zero. American roulette doubles the zero and raises the edge to 5.26%, with the five-number bet worse still at 7.89%. Choosing a European or French wheel is the single most valuable roulette decision you can make.
Why the Zero Determines Everything
A roulette wheel pays as if the zeros did not exist. There are 36 numbered pockets plus one or two green zeros, but a straight-up winner pays 35-to-1 — the fair price if there were exactly 36 pockets.
That single gap is the house edge, and it applies uniformly across almost every bet type on the layout.
- European wheel (single zero): 37 pockets, 2.70% house edge
- American wheel (double zero): 38 pockets, 5.26% house edge
- Triple-zero wheel: 39 pockets, 7.69% house edge
Playing the same $100 through an American wheel costs roughly twice what it costs through a European one. Over a session of a few hundred spins, that difference is substantial and entirely avoidable.
House Edge by Bet Type
Inside bets
Inside bets cover specific numbers and pay the largest multiples.
- Straight up (1 number): pays 35:1 — 2.70% European, 5.26% American
- Split (2 numbers): pays 17:1 — same edges
- Street (3 numbers): pays 11:1 — same edges
- Corner (4 numbers): pays 8:1 — same edges
- Six line (6 numbers): pays 5:1 — same edges
- Five number bet (American only): pays 6:1 — 7.89% edge
The five-number bet on 0-00-1-2-3 is the worst wager on any roulette table. It exists only on American wheels and should never be played.
Outside bets
- Red/Black, Odd/Even, High/Low: pays 1:1 — 2.70% European, 5.26% American
- Dozens and Columns: pays 2:1 — same edges
Notice what does not change: the house edge is identical across bet types on the same wheel. Outside bets do not have a lower edge — they have lower variance. You lose the same amount per dollar wagered over time, just more slowly and smoothly.
The French Rules That Cut the Edge in Half
French roulette adds two rules that apply only to even-money bets when the ball lands on zero.
La Partage
You lose half your even-money bet instead of all of it. This cuts the house edge on those bets from 2.70% to 1.35%.
En Prison
Your bet is held for the next spin. If it wins, you get the stake back with no profit. The mathematical result is similar to La Partage — roughly 1.35%.
A 1.35% edge on even-money bets is competitive with baccarat and better than most slots. If a French table is available, even-money bets there are the best value in roulette. Our broader casino strategy material covers how these rule variations compare across table games.
Why Betting Systems Do Not Work
Roulette attracts more betting systems than any other game, and none of them change expected value.
The Martingale
Double after every loss so that one win recovers everything. It fails for two reasons: table maximums cap how many times you can double, and bankrolls are finite. A run of eight losses starting at $5 requires a $1,280 bet on the ninth spin. Such runs happen regularly.
The D'Alembert and Fibonacci
Gentler progressions that increase stakes more slowly. They reduce the speed of ruin but not its inevitability. Each spin is independent, and no sequence of past results changes the probability of the next one.
The gambler's fallacy
Red has hit eight times in a row, so black is "due." It is not. The wheel has no memory. The probability of black on the next spin is exactly what it was on the first.
The only decisions that measurably affect your results are wheel selection, bet selection where rule variations apply, and how much you wager. Everything else is presentation.
Practical Roulette Guidelines
- Always choose a single-zero wheel. Avoid American and triple-zero tables entirely when a European option exists.
- Prefer French rules for even-money bets. La Partage or En Prison halves your cost.
- Match variance to your bankroll. Inside bets produce big swings; outside bets produce longer sessions on the same budget.
- Set a session budget before you start. Decide the amount in advance and stop when it is gone.
- Check bonus game weighting. Roulette frequently contributes only 10% or less toward wagering requirements, and some bonuses exclude it entirely.
That last point catches many players out. Before using a deposit bonus on roulette, confirm the terms — details we break down in our guide to the best casino bonuses.
Live Dealer vs RNG Roulette
Online roulette comes in two forms. RNG roulette uses a certified random number generator and plays quickly, letting you control pace entirely. Live dealer roulette streams a physical wheel with a real croupier, running at a fixed pace of roughly 40 to 50 spins per hour.
The house edge is identical in both formats for the same wheel type. The practical difference is speed: RNG roulette can produce 200 or more spins per hour, meaning you cycle through far more expected loss in the same period. Players focused on session length should factor that in. Our live dealer casinos guide compares the leading providers.
Frequently Asked Questions
What is the best bet in roulette?
Even-money bets on a French table with La Partage or En Prison, at roughly 1.35% house edge. Without those rules, all standard bets on a European wheel carry the same 2.70% edge.
Is European or American roulette better?
European, decisively. The single zero produces a 2.70% house edge versus 5.26% for American roulette's double zero — roughly half the long-run cost.
Do roulette betting systems work?
No. Progressions like the Martingale change the distribution of outcomes but not the expected value. Table limits and finite bankrolls guarantee eventual failure.
What is the worst bet in roulette?
The five-number bet on 0-00-1-2-3, available only on American wheels, at 7.89% house edge.
Does roulette count toward casino bonus wagering?
Usually only partially. Many operators weight roulette at 10% or exclude it from bonus play entirely. Always check the specific terms before playing.
The Bottom Line
Roulette rewards one good decision made before you place a chip: pick a single-zero wheel, ideally with French rules. After that, bet selection changes your variance rather than your expected result, and no system will alter the math.
Compare game selection and rule variations at the best online casinos before your next session.
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