If you’ve ever wondered why experienced players gravitate toward European roulette, it comes down to one small detail with a big mathematical impact: the wheel layout. European roulette uses a single zero (37 pockets), while American roulette adds a double zero (38 pockets). The bet types and posted payouts look the same, but the extra zero changes the probabilities and lifts the house edge from about 2.70% to about 5.26%.
There’s an additional advantage on many European (and especially French) tables: special rules like La Partage and En Prison that reduce the effective house edge on even-money bets. That means “European vs American roulette” isn’t just a cosmetic comparison. It can directly affect your expected returns, bankroll longevity, and the best table to choose—whether you’re playing online or at a live casino.
Quick comparison: European vs American roulette at a glance
| Feature | European Roulette | American Roulette |
|---|---|---|
| Wheel pockets | 37 (numbers 1–36 + single 0) | 38 (numbers 1–36 + 0 + 00) |
| Single zero vs double zero | Single zero | Double zero |
| House edge (most bets) | 1 / 37 ≈2.70% | 2 / 38 ≈5.26% |
| Even-money rules sometimes offered | Often La Partage or En Prison | Typically none (varies by venue) |
| Best typical “value” angle | Choose single-zero; prioritize La Partage/En Prison | Avoid 00 tables when you have a choice |
Single zero vs double zero: why one extra pocket matters
Roulette payouts are set in a way that would be “fair” if there were only 36 numbers. For example, a straight-up bet pays 35 to 1, which aligns with 36 equally likely outcomes (win 1, lose 35). But real wheels add at least one green pocket (0), and American wheels add two (0 and 00). Those green pockets are what create the house advantage.
European roulette probabilities (37 pockets)
- Probability of any specific number (including 0): 1 / 37≈ 2.7027%
- House edge on standard bets: 1 / 37≈2.70%
American roulette probabilities (38 pockets)
- Probability of any specific number (including 0 and 00): 1 / 38≈ 2.6316%
- House edge on standard bets: 2 / 38≈5.26%
The key takeaway: with American roulette, you’re paying for an extra green pocket that generally doesn’t improve your payout—so your expected loss rate roughly doubles compared to European roulette.
Odds and payouts: same posted payouts, different true odds
A common point of confusion is that both versions show the same nominal payouts (e.g., 35:1 on a straight-up bet, 1:1 on red/black). That’s true—but your chance of winning differs because the wheel has a different number of pockets.
Roulette payout and probability examples
| Bet type | Typical payout | Win probability (European) | Win probability (American) |
|---|---|---|---|
| Straight up (1 number) | 35 to 1 | 1 / 37 ≈ 2.70% | 1 / 38 ≈ 2.63% |
| Split (2 numbers) | 17 to 1 | 2 / 37 ≈ 5.41% | 2 / 38 ≈ 5.26% |
| Street (3 numbers) | 11 to 1 | 3 / 37 ≈ 8.11% | 3 / 38 ≈ 7.89% |
| Dozen (12 numbers) | 2 to 1 | 12 / 37 ≈ 32.43% | 12 / 38 ≈ 31.58% |
| Even-money (18 numbers) | 1 to 1 | 18 / 37 ≈ 48.65% | 18 / 38 ≈ 47.37% |
While the probability differences may look small per spin, roulette is a high-volume game. Over many spins, the house edge is what tends to show up in your results.
House edge explained (with simple math you can reuse)
Roulette’s house edge can be expressed in a straightforward way for standard bets:
- European roulette: house edge = 1 / 37≈2.70%
- American roulette: house edge = 2 / 38≈5.26%
That means that, in the long run, the casino’s expected win is about 2.70 units per 100 units wagered on European roulette (and about 5.26 per 100 on American), assuming standard rules.
A quick EV “calculator” you can do mentally
If you want a fast estimate of your theoretical expected loss:
Expected loss ≈ Total amount wagered × House edgeExamples:
- If you wager 500 total (across many spins) on European roulette: 500 × 0.0270 ≈13.50 expected loss.
- If you wager 500 total on American roulette: 500 × 0.0526 ≈26.30 expected loss.
This doesn’t predict short-term outcomes, but it’s a powerful way to compare tables and rules quickly.
La Partage vs En Prison: why European roulette can be even better on even-money bets
Many European-style tables (often branded as “French roulette” in casinos and online lobbies) include special rules that apply specifically to even-money bets like red/black, odd/even, and high/low.
La Partage (share)
With La Partage, if you place an even-money bet and the ball lands on 0:
- You lose only half your even-money stake (the other half is returned).
This reduces the house edge on eligible even-money bets to about:
- 1.35% (approximately half of 2.70%)
En Prison (in prison)
With En Prison, if you place an even-money bet and the ball lands on 0:
- Your stake is “imprisoned” for the next spin instead of being lost immediately.
- If the next spin wins your even-money bet, you get your original stake back (typically without additional winnings).
- If the next spin loses, you lose the imprisoned stake.
Under the common form of En Prison, the effective house edge on even-money bets is also about 1.35%, similar to La Partage.
Which is better: La Partage or En Prison?
In many standard implementations, they are very close in value on even-money bets. The practical difference is experience and bankroll flow:
- La Partage is simple and immediate (half back right away on 0).
- En Prison can feel smoother for bankroll management because you get a “second chance” next spin, but your money is tied up temporarily.
Either way, if you like outside bets, these rules are one of the clearest reasons European roulette often delivers better expected returns than American roulette.
Best bets: what changes (and what doesn’t) between European and American roulette
One of the biggest benefits of understanding “European vs American roulette” is knowing where table selection matters more than bet selection.
What doesn’t change: no betting system beats the math
Progressions and betting systems (Martingale, Fibonacci, D’Alembert, and similar) do not change the underlying expected value. They can change the variance (how swingy your results feel) and the risk of hitting table limits or bankroll constraints, but they do not remove the house edge.
What does change: the best-value table and rules
From an expected-value perspective, your “best bet” is often:
- Choose single-zero wheels over double-zero wheels.
- If available, choose tables offering La Partage or En Prison when you plan to play even-money bets.
Best bets by goal (practical guide)
- For lower volatility: even-money bets (red/black, odd/even, high/low), ideally with La Partage or En Prison.
- For bigger win potential per spin: inside bets (straight up, splits). Note that volatility increases significantly, and the house edge typically remains tied to the wheel rules.
- For a balanced middle: dozens and columns provide moderate hit rate with moderate payouts.
Variance and bankroll: why the wheel affects your “time on table”
Two players can make the same type of bet with the same stake size and still have different long-run results depending on whether the wheel is European or American. The reason is simple: a higher house edge means your bankroll tends to drift downward faster over many spins.
On top of that, rules like La Partage and En Prison can soften the impact of the 0 on outside bets, which can meaningfully increase your staying power if your preferred style is even-money wagering.
In practical terms, if your goal is entertainment value and longer sessions, European single-zero roulette (especially with La Partage / En Prison) often supports that goal better than American double-zero roulette.
Clear examples: expected loss on red/black (European vs American)
Let’s compare a straightforward plan: betting 10 units on red for 100 spins. The total amount wagered is 1,000 units.
European roulette (single zero), standard rules
- House edge ≈ 2.70%
- Expected loss ≈ 1,000 × 0.0270 =27 units
European roulette with La Partage / En Prison (even-money bets)
- Effective house edge on even-money bets ≈ 1.35%
- Expected loss ≈ 1,000 × 0.0135 =13.5 units
American roulette (double zero)
- House edge ≈ 5.26%
- Expected loss ≈ 1,000 × 0.0526 =52.6 units
This is a big reason “single zero vs double zero” is one of the most important roulette comparisons you can make—especially if you play frequently.
American double-zero: a bit of historical context (and why it stuck)
Roulette originated in Europe, and the single-zero format became the widely recognized standard there. When roulette spread and evolved in the United States, the double-zero (0 and 00) wheel became common, which increased the house advantage while keeping payouts familiar and easy to market.
That historical difference is why you’ll often see:
- European roulette associated with single-zero wheels and, in some cases, French-rule variants.
- American roulette associated with the double-zero wheel and a higher built-in edge.
Regional availability: where you’re more likely to find each version
While casinos and online platforms can offer any variant, a general rule of thumb is:
- European roulette is widely available across Europe and is also common online.
- American roulette is especially common in North America and in venues that cater to that style.
- French roulette (typically single-zero) is where you’re more likely to see La Partage or En Prison, particularly in European-branded offerings.
The practical benefit: online lobbies often give you multiple roulette tables and rule sets side-by-side, making it easier to choose a lower-edge option if you know what to look for.
Online vs live roulette: how to choose the best table quickly
Whether you play online roulette game (RNG) roulette or live dealer roulette, the same math applies: the wheel layout and rules determine your long-run expected return. The big advantage of online is that you can often compare tables instantly.
Checklist: picking a better roulette table (fast)
- Confirm the wheel type: look for single zero (0) rather than double zero (0 and 00).
- Check for La Partage or En Prison: especially if you prefer red/black, odd/even, or high/low.
- Scan bet limits: choose limits that fit your bankroll so you’re not forced into uncomfortable stake sizes.
- Avoid misleading labels: some tables may be themed “European style” but still list 00. Always verify the layout.
- Know your preferred pace: live dealer games may be slower than RNG, which can reduce the number of decisions (and variance) per hour.
Practical tip: compare by house edge, not by “feel”
Live roulette can feel more engaging, and RNG roulette can feel faster. Both can be fun. But if your goal includes better expected returns, prioritize single zero vs double zero and the presence of La Partage or En Prison over anything else.
Infographic-style summary (text version)
| What you want | Look for | Why it helps |
|---|---|---|
| Better expected returns | European roulette (single zero) | Lower base house edge (≈ 2.70%) |
| Best outside-bet value | La Partage or En Prison | Even-money edge can drop to ≈ 1.35% |
| Fewer green-pocket losses | Avoid double zero tables | 00 increases house edge to ≈ 5.26% |
| Smoother bankroll experience | Even-money bets on low-edge tables | Higher hit frequency; reduced penalty on 0 with special rules |
Common roulette myths (and the useful truth)
Myth: “European roulette pays more”
Truth: Posted payouts are typically the same. European roulette is better because the odds are better due to fewer pockets, and sometimes because of La Partage or En Prison on even-money bets.
Myth: “A strategy can overcome the house edge”
Truth: No betting pattern changes the underlying expected value. The most effective “strategy” for expected return is choosing the right table rules.
Myth: “00 doesn’t matter much”
Truth: It matters a lot. The house edge nearly doubles from about 2.70% to 5.26%, which is a substantial shift over repeated play.
Final takeaway: how to win the comparison in one step
If you remember only one rule from the European vs American roulette debate, make it this:
Choose single zero over double zero whenever possible, and prioritize tables with La Partage or En Prison if you play even-money bets.
That simple choice improves your odds, lowers the house edge, and typically gives you better expected returns—without changing how you enjoy the game.
Quick FAQ: European roulette vs American roulette
Is European roulette always better than American roulette?
From a mathematical expected-value standpoint, European roulette is generally better because of the lower house edge from the single zero. If the European table also offers La Partage or En Prison, even-money bets become even more favorable.
Do odds and payouts differ between European and American roulette?
Payouts are usually the same, but the odds (win probabilities) differ because European has 37 pockets and American has 38. That difference is what changes the house edge.
What are the best bets in roulette?
“Best” depends on your goal. For lower volatility and longer sessions, even-money bets on a single-zero table with La Partage or En Prison are among the most player-friendly options. For higher payouts per win, inside bets offer bigger wins but with much higher variance.
Does online vs live roulette change the house edge?
No. The house edge comes from the wheel layout and rules. Online play can make it easier to compare tables quickly, while live roulette offers a more immersive experience. In both cases, pick the best rules first.
