Roulette can look nearly identical from a distance: a spinning wheel, a felt layout, and the thrill of watching where the ball lands. But two of the most common versions—European roulette and American roulette—are separated by one small design choice that has a big mathematical impact.
The core difference is the wheel layout.European (and French) roulette uses 37 pockets (numbers 1–36 plus a single zero, 0).American roulette uses 38 pockets (numbers 1–36 plus 0 and 00). That extra pocket changes the odds on every bet, increases the casino advantage, and typically makes results more volatile over time.
This guide breaks down the numbers, explains French rules like la partage and en prison, highlights table and bet-marking differences, and gives practical tips so you can confidently choose the best roulette to play—especially if you’re hunting for single-zero games.
Quick comparison: European vs American roulette at a glance
| Feature | European / French Roulette | American Roulette |
|---|---|---|
| Wheel pockets | 37 (1–36 + 0) | 38 (1–36 + 0 + 00) |
| Straight-up win probability | 1/37 (≈ 2.70%) | 1/38 (≈ 2.63%) |
| Typical house edge | ≈ 2.70% | ≈ 5.26% |
| Common “even-money” special rules | Often: la partage or en prison (French roulette) | Typically none |
| Volatility (all else equal) | Lower than double-zero | Higher due to extra pocket |
| Where you’ll often find it | Common in Europe; widely available online | Common in many U.S. casinos; also online |
The math that matters: pockets, odds, and house edge
Roulette payouts for most standard bets are designed around the 36 numbered outcomes (1–36). When you add a zero (or two), you add outcomes that typically don’t pay most bets—this is where the casino edge comes from.
European roulette: 37 pockets and a ~2.70% house edge
European roulette has 37 equally likely outcomes. For a straight-up bet (betting one exact number), the chance of winning is:
Win probability = 1 / 37 ≈ 0.02703 (2.70%)
The standard payout for a straight-up win is 35 to 1 (you win 35 units profit plus your original stake back). Despite that attractive payout, the single zero creates a long-run casino advantage of about 2.70%.
American roulette: 38 pockets and a ~5.26% house edge
American roulette adds the 00, bringing the total to 38 equally likely outcomes. For a straight-up bet, the chance of winning becomes:
Win probability = 1 / 38 ≈ 0.02632 (2.63%)
That difference—2.70% vs 2.63% on a single number—looks small, but it reflects a bigger shift in overall value because the extra pocket affects every bet. The long-run house edge typically rises to about 5.26%, which is roughly double the European edge.
Why the house edge jumps: a simple expected value example
If you wager 1 unit on a straight-up number:
- European roulette: you win 35 units profit with probability 1/37, otherwise lose 1 unit with probability 36/37.
- American roulette: you win 35 units profit with probability 1/38, otherwise lose 1 unit with probability 37/38.
Over time, that “extra losing outcome” (the 00) is what increases the casino’s advantage. The practical takeaway is simple: single-zero roulette generally gives you more play for your bankroll because less value is being skimmed by the rules.
French roulette rules that can improve even-money bets
French roulette is usually played on a European-style wheel (single zero), but it often adds special rules for even-money bets such as:
- Red / Black
- Odd / Even
- 1–18 / 19–36
These rules are popular because they can reduce the effective house edge on those even-money wagers when the ball lands on 0.
La partage (the “split” rule)
Under la partage, if you place an even-money bet and the result is 0, you typically get half your stake back (and lose the other half).
Why this helps: instead of losing the full bet on zero, you only lose half. This reduces the effective house edge on even-money bets to approximately 1.35% (half of the standard European 2.70% edge on those bet types).
En prison (the “in prison” rule)
En prison is another common French roulette rule applied to even-money bets. If the ball lands on 0, your even-money wager is not immediately lost; it is “imprisoned” and typically carried over to the next spin.
- If your even-money bet wins on the next spin, you usually get your stake back (depending on the exact house rule).
- If it loses on the next spin, you lose the stake.
In practice, en prison is often comparable in value to la partage for even-money bets, and it can be a very player-friendly feature when you’re sticking to simple outside wagers.
Best-case takeaway: If you like betting Red/Black or Odd/Even, a single-zero game with la partage or en prison can be one of the most favorable mainstream roulette options you’ll find.
Wheel layout and table layout: what looks different and why it matters
European and American roulette don’t only differ in the wheel—they also differ in the table layout and how bets are marked and managed.
Wheel layout differences
- European / French wheel: includes numbers 1–36 and a single 0.
- American wheel: includes numbers 1–36 plus 0 and 00.
That extra 00 is the primary reason the American version carries a higher house edge.
Table layout and bet-marking differences
On the felt:
- European layout typically shows a single green 0 pocket at the top of the grid.
- American layout shows two green pockets, 0 and 00, usually stacked at the top.
In live casino settings, you may also notice operational differences in how bets are managed:
- Some tables use markers (often called lammers) to indicate special outcomes or to manage rules like en prison.
- French roulette tables can look slightly different due to traditional naming conventions and the presence of rules signage for la partage or en prison.
For players, the main “felt-level” skill is simply recognizing whether you’re on a single-zero or double-zero game before you place your first chip.
Volatility: why double-zero roulette can feel swingier
Roulette is inherently variable in the short run, but the American double-zero format tends to be more volatile in a practical sense because:
- The house edge is higher, so losses can accumulate faster over long sessions.
- There is an extra non-paying pocket for many bet types, creating a slightly tougher environment for bankroll longevity.
This doesn’t change the fact that any single spin is random (in fair games), but it does influence how long your bankroll might last and how your results can feel session to session.
Where each version is common (and what you’ll likely see in the U.S.)
In many U.S. casinos, double-zero roulette is common—especially on busy floors where the traditional American wheel is a long-standing standard. European-style single-zero tables may still exist in some venues, but they are not always the default.
In many European casinos, the single-zero wheel is the norm, and French roulette with la partage or en prison may be widely available.
Online, availability is often broader, which is great news if your goal is to consistently choose better odds (meaning a lower house edge) and compare games like black jack online.
Online roulette: RNG vs live dealer (and how to choose)
Online roulette generally comes in two main formats: RNG roulette and live dealer roulette. Both can be legitimate, but they feel very different to play.
RNG roulette (software-based)
RNG roulette uses a random number generator to simulate outcomes. Key characteristics:
- Fast-paced play (more spins per hour).
- Often includes many variants, including European and French roulette.
- Clear on-screen display of the wheel type (look for 0 vs 0 and 00).
Because RNG roulette can move quickly, the impact of a higher house edge can show up faster over time. That’s one more reason to prioritize single-zero or French-rule games if your goal is efficient value per spin.
Live dealer roulette (real wheel streamed)
Live dealer roulette streams a real roulette wheel hosted by a dealer. Benefits often include:
- A more authentic casino feel and a slower tempo.
- Social features like chat (varies by platform).
- Clear visibility of the physical wheel—helpful for confirming whether it’s single-zero or double-zero.
When comparing live tables, always verify the wheel type in the table name or rules panel. A table labeled European Roulette or French Roulette is typically what you’re looking for if you want the lower-edge option.
Odds comparisons players actually use (straight-up, outside bets, and more)
Many people search for “roulette odds” because they want to know what they’re really getting when they place common bets. Here are the practical differences that come from the number of pockets.
Straight-up number bet
- European: 1/37 chance to hit (≈ 2.70%)
- American: 1/38 chance to hit (≈ 2.63%)
Even-money outside bets (Red/Black, Odd/Even, etc.)
The probability of winning an even-money bet is slightly better in single-zero roulette because there is only one green pocket that causes an automatic loss (unless la partage or en prison applies).
- European: 18 winning outcomes, 18 losing outcomes, plus 0 (typically a loss without French rules)
- American: 18 winning outcomes, 18 losing outcomes, plus 0 and 00 (typically both losses)
If you play French roulette with la partage or en prison, the even-money experience becomes even more attractive because the zero outcome is softened rather than being a full loss.
So, what is the best roulette to play?
If “best” means best odds and best value per wager, the hierarchy is usually straightforward:
- Best overall (common options):French roulette with la partage or en prison (especially for even-money bets)
- Next best:European roulette (single-zero) without special rules
- Less favorable:American roulette (double-zero) due to the higher house edge
This doesn’t mean you can’t enjoy American roulette—many players love its fast, classic U.S. casino vibe. But if you’re optimizing for probability and bankroll efficiency, single-zero games are the smart pick.
Practical tips to choose single-zero roulette (online and in-person)
If you want better odds without changing the way you play, your biggest win is often just choosing the right table. Use these simple checks.
1) Look for the “0 vs 00” tell
- Single green slot: European / French roulette
- Two green slots (0 and 00): American roulette
2) Read the table name and rules panel
Whether online or on a casino floor, the rules placard or info panel usually states the wheel type. Online, it may also clearly list special rules like la partage.
3) If you like outside bets, prioritize French rules
If your go-to bets are Red/Black or Odd/Even, seek out French roulette tables offering la partage or en prison. These rules are designed specifically to improve the value of even-money wagers when 0 hits.
4) Manage pace and session length
Especially online, faster spin speeds can mean more wagers placed in less time. If you’re playing for entertainment and longevity, consider:
- Choosing live dealer tables for a calmer pace, and
- Sticking to single-zero games to reduce the mathematical disadvantage per bet.
5) Treat “best strategy” as “best selection + bankroll discipline”
No betting system changes the underlying house edge of the wheel. The most reliable, player-controlled improvements usually come from:
- Choosing single-zero over double-zero,
- Choosing French rules when available for even-money bets, and
- Setting clear limits for stake sizing and session time.
European vs American roulette: the bottom line
The difference between European and American roulette is wonderfully simple and extremely important: 37 pockets vs 38 pockets.
- European roulette (single-zero) offers a straight-up win chance of 1/37 and a house edge of about 2.70%.
- American roulette (double-zero) offers a straight-up win chance of 1/38 and a house edge of roughly 5.26%.
If you want the best odds and a smoother bankroll experience, aim for single-zero games—especially French roulette with la partage or en prison on even-money bets. That one choice can make your roulette sessions feel more rewarding, more sustainable, and more aligned with smart play.
FAQ: common questions about European and American roulette
Is European roulette better than American roulette?
In terms of mathematical value, yes: European roulette’s house edge (about 2.70%) is lower than American roulette’s (about 5.26%). A lower house edge generally means better long-run value for the player.
Does French roulette always have better odds than European roulette?
French roulette typically uses the same single-zero wheel as European roulette. It can be even better for even-money bets if it includes la partage or en prison, which reduce the effective edge on those bets.
Why is American roulette more common in U.S. casinos?
American roulette is a long-established standard in many U.S. venues, and the double-zero wheel is part of that tradition. It also produces a higher house edge, which is favorable for the casino.
Should I play RNG roulette or live dealer roulette online?
Both can be good choices depending on your preferences. RNG roulette is faster and offers many variants, while live dealer roulette provides a real-wheel experience and an easy visual confirmation of whether the game is single-zero or double-zero. For odds, the key factor is still the wheel type and rules.
What’s the easiest way to pick the best roulette table?
Choose single-zero roulette when possible, and if you like even-money bets, look for French roulette with la partage or en prison.
