If you have ever compared European vs American roulette side by side, it can feel like the games are almost identical. The bets look the same, the payouts look the same, and the spin-and-bounce excitement is the same. But there is one structural difference that quietly (and consistently) changes your long-term results: the wheel layout.
European roulette uses a single-zero wheel (0), while American roulette adds a double-zero (00). That extra pocket may look harmless, but it increases the casino advantage significantly and shifts the probabilities on every bet you make. Over time, that difference can have a meaningful impact on your bankroll, your session length, and your overall return.
This guide breaks down single zero vs double zero roulette in practical terms, explains the roulette house edge with real numbers, and shows why rules like en prison and la partage are worth seeking out when they are available.
Quick definition: European roulette vs American roulette
At a high level, both versions are based on the same core idea: you bet on where a ball will land on a spinning wheel, and you’re paid according to the type of bet you choose.
- European roulette: 37 pockets total (numbers 1 to 36 plus a single 0).
- American roulette: 38 pockets total (numbers 1 to 36 plus 0 and 00).
Everything that flows from this difference is about probability. Because American roulette has one extra losing pocket (from the player’s perspective), the chance of winning any given bet is slightly lower, even though the posted payouts are the same.
Wheel layout: the extra 00 is the whole story
The cleanest way to understand the difference is to think in terms of “how many pockets exist” and “how many of those pockets make me win this bet.” The wheel defines those odds.
European roulette wheel (single-zero)
- 37 total outcomes
- 1 to 36 (red or black)
- One green pocket: 0
American roulette wheel (double-zero)
- 38 total outcomes
- 1 to 36 (red or black)
- Two green pockets: 0 and 00
That second green pocket is not just cosmetic. It increases the frequency of “house numbers” landing, which is exactly what raises the roulette house edge.
European vs American roulette odds: the house edge in plain numbers
The house edge is the casino’s built-in average advantage over the long run. It does not mean you lose every session, and it does not predict short-term outcomes. It does mean that, across many spins, the math favors the casino by a predictable percentage.
Here are the standard house edges for the two main wheels:
- European roulette house edge: about 2.70% (more precisely 1/37 ≈ 2.7027%).
- American roulette house edge: about 5.26% (more precisely 2/38 ≈ 5.2632%).
Notice what happened: American roulette doesn’t increase the edge by a small amount. It almost doubles it.
Why the edge jumps so much
The payouts stay the same in both games, but American roulette gives the casino an additional green pocket that is not covered by the “even-money” structure of the board. That means more spins end in outcomes that are unfavorable to players across most bet types.
Payouts and bet types: what stays the same
One reason the difference is easy to miss is that the betting menu is essentially the same. You will still see the familiar split between inside bets and outside bets.
Inside bets (same payouts, different probabilities)
- Straight up (single number): pays 35 to 1
- Split (two numbers): pays 17 to 1
- Street (three numbers): pays 11 to 1
- Corner (four numbers): pays 8 to 1
- Six line (six numbers): pays 5 to 1
Outside bets (same payouts, different probabilities)
- Red / Black: pays 1 to 1
- Odd / Even: pays 1 to 1
- High / Low (19–36 / 1–18): pays 1 to 1
- Dozens (1–12, 13–24, 25–36): pays 2 to 1
- Columns: pays 2 to 1
The key takeaway is simple: payouts and bet types remain the same, but the probabilities shift because the number of total pockets changes.
Probability shifts: how one extra pocket affects every bet
When you place a bet, your chance of winning is “winning pockets divided by total pockets.” Since American roulette has 38 pockets instead of 37, every probability is slightly worse for the player.
Here are a few common examples to make the change feel real:
- Straight-up bet: 1 winning number
- European: 1/37 ≈ 2.70%
- American: 1/38 ≈ 2.63%
- Red/Black: 18 winning colors (but 0 and 00 are green)
- European: 18/37 ≈ 48.65%
- American: 18/38 ≈ 47.37%
- Dozen bet: 12 winning numbers
- European: 12/37 ≈ 32.43%
- American: 12/38 ≈ 31.58%
Those percentage differences can look small in isolation, but roulette is a high-volume game. Over many spins, those small shifts drive the long-term expected results.
European vs American roulette: comparison table
| Feature | European Roulette | American Roulette |
|---|---|---|
| Total pockets | 37 (1–36 + 0) | 38 (1–36 + 0 + 00) |
| Green pockets | 1 (0) | 2 (0, 00) |
| Typical house edge | ~ 2.70% | ~ 5.26% |
| Bet types | Inside and outside bets | Inside and outside bets |
| Payout schedule | Same standard payouts | Same standard payouts |
| Player-friendly rules | Often available (en prison/la partage on even-money bets at some tables) | Uncommon |
| Where you often see it | Common in Europe and widely offered online | Common in many US land-based casinos |
Why the double-zero hurts long-term returns
If you care about getting more entertainment time per dollar (or simply want your play to be more efficient), the double-zero is the main obstacle. The reason is mathematical: a higher house edge means a higher expected cost per spin.
Expected cost example (simple and practical)
Suppose you make $10 bets repeatedly:
- On a European wheel with a ~ 2.70% house edge, the long-run expected cost per $10 bet is about $0.27.
- On an American wheel with a ~ 5.26% house edge, the long-run expected cost per $10 bet is about $0.53.
That difference compounds with volume. Over hundreds of spins, the gap becomes very noticeable in how long your bankroll lasts.
This is why “single zero vs double zero” is not trivia. It’s one of the most meaningful factors you can control when choosing a roulette game.
Even-money rule upgrades: en prison and la partage (and why they’re a big deal)
Many players already know that European roulette is better than American roulette. Fewer players realize that some European-style tables can be even more player-friendly because of special rules applied to even-money bets (Red/Black, Odd/Even, High/Low).
These rules are most associated with French roulette, which uses the same single-zero wheel as European roulette but may add extra rules.
La partage
With la partage, if you place an even-money bet and the ball lands on 0, you lose only half your stake (the other half is returned).
- Example: You bet $10 on Black.
- If 0 hits, you get $5 back and lose $5.
En prison
With en prison, if you place an even-money bet and 0 hits, your bet is “imprisoned” and carried to the next spin. If your bet wins on the next spin, you usually get your stake back (rather than receiving a profit). If it loses, you lose the bet.
- Example: You bet $10 on Even.
- If 0 hits, the $10 stays “in prison.”
- Next spin: if Even hits, you typically recover your $10; if Odd hits, you lose it.
How these rules change the house edge (for even-money bets only)
On a standard European wheel, the house edge is ~ 2.70% across typical bets. With la partage or en prison on even-money bets, the effective house edge on those even-money bets drops to about 1.35%.
That is a meaningful improvement because it reduces the cost of playing those common outside bets. It does not remove the house edge entirely, but it makes your bankroll last longer on average and improves your long-term value per spin.
Strategy implications: what smart players do differently
Roulette is a negative-expectation game in the long run, which means the “best strategy” is less about trying to beat the math and more about making the math as favorable as possible, then playing with discipline.
Here are practical implications that can improve your overall experience and expected value.
1) Favor European (single-zero) tables whenever possible
If you take only one action from this entire guide, make it this: prioritize single-zero roulette. It’s the cleanest way to reduce the roulette house edge without changing how you play.
- European wheel: ~ 2.70%
- American wheel: ~ 5.26%
Choosing European roulette can effectively cut the expected cost of play nearly in half compared to American roulette.
2) Actively look for en prison or la partage on even-money bets
If you enjoy outside bets like Red/Black, Odd/Even, or 1–18/19–36, tables with la partage or en prison can be especially attractive. They are designed to soften the impact of the zero outcome on even-money wagers.
When you find a legitimate single-zero table with one of these rules, you are getting a measurable upgrade for the exact same type of bet and the same style of gameplay.
3) Understand what changes and what does not
- What changes: your probability of winning (slightly), and therefore your long-term expectation (meaningfully).
- What does not change: the payouts posted on the felt, the available bet types, and the short-term volatility (roulette will always have swings).
4) Bankroll implications: your money typically lasts longer on European rules
Lower house edge generally means you can expect more spins per bankroll unit, all else equal. That can translate into:
- Longer sessions for the same budget
- More time to enjoy the game’s natural variance (the fun part)
- Less pressure to increase bet sizes quickly
For many players, this is the biggest real-world benefit: more entertainment and a slower expected “cost of play.”
5) Keep strategy simple: disciplined bankroll management beats complicated systems
Many roulette strategies focus on bet progressions. While they may change your short-term pattern of wins and losses, they do not change the underlying house edge of the wheel you are playing.
Instead, focus on controllables:
- Set a session bankroll you are comfortable spending.
- Choose a base bet size that allows plenty of spins (many players prefer 100+ base-bet spins as a guideline for pacing).
- Set a win goal and a loss limit so you can end sessions on your terms.
- Avoid chasing after losses by rapidly increasing stakes.
This approach pairs especially well with European roulette because you are already starting from better math.
Regional availability: where you’re likely to find each wheel
Availability matters because sometimes you are not choosing between wheels in theory, you are choosing between what is actually on the casino floor or in the game lobby.
American roulette (0 and 00)
American double-zero roulette is common in many US land-based casinos. If you play in the United States, you will often see 00 as the default option, especially in traditional casino environments.
European roulette (single-zero)
Single-zero roulette is typical across much of Europe and is also widely offered in online casinos. Online platforms often provide multiple roulette variants, which makes it easier to select a game with a lower house edge and more favorable rules.
French roulette rules (en prison / la partage)
Tables with en prison or la partage are more commonly associated with European-style offerings, especially where French roulette rules are promoted. The key is to verify that the rule is actually in effect for even-money bets, because the presence (or absence) of that rule changes the value.
How to choose the best roulette table (a practical checklist)
When your goal is to maximize value, the “best” roulette table is usually the one with the lowest house edge and the clearest rules. Use this quick checklist before you commit your bankroll.
Table selection checklist
- Confirm the wheel: Is it single zero (0) or double zero (0 and 00)?
- Look for rule benefits: Are la partage or en prison offered on even-money bets?
- Check table limits: Make sure the minimum bet fits your bankroll plan and the maximum does not constrain your preferred bet sizing.
- Know the bet settlement: Understand exactly what happens when 0 (or 00) hits for the bets you like to make.
- Stay consistent: If you find a favorable game, stick with it rather than bouncing to worse variants out of habit.
FAQ: common questions about European vs American roulette
Is European roulette always better than American roulette?
From a mathematical standpoint, yes, standard European roulette is generally better for players than standard American roulette because the house edge is lower (about 2.70% vs about 5.26%). A lower edge improves long-run value and typically supports longer play for the same bankroll.
Do European and American roulette have the same payouts?
In standard rules, yes. The typical payout structure (35 to 1 for a straight-up number, 1 to 1 for even-money bets, and so on) is the same. The difference is that the American wheel’s extra pocket changes the probability of winning while leaving payouts unchanged, which increases the house edge.
What does “single zero vs double zero” actually mean for me as a player?
It means that on a double-zero wheel there is one additional outcome (00) that generally works against player bets. Over time, that extra outcome raises the casino advantage, increasing the expected cost of play and lowering long-term returns.
Do en prison and la partage apply to all bets?
No. These rules typically apply only to even-money outside bets (Red/Black, Odd/Even, High/Low). They do not usually change the odds on inside bets like straight-ups, splits, or corners. The main benefit is reducing the impact of the zero result on even-money wagers.
SEO keywords to know (and how to use them naturally)
If you are researching the best wheel, these are the phrases players commonly use when comparing games and value:
- casino roulette
- single zero vs double zero
- roulette house edge
These keywords map to the most important decision points: wheel type, probability, and long-run cost.
Bottom line: choose the wheel that gives you the best math
Roulette will always be a game of chance, but you can still make a smart, value-focused choice before you place your first chip. The simplest upgrade is also the most powerful: pick European roulette over American roulette whenever you can.
To stack the odds in your favor as much as roulette allows:
- Seek single-zero wheels (37 pockets) instead of double-zero wheels (38 pockets).
- Prefer tables with en prison or la partage if you like even-money bets.
- Use disciplined bankroll management so your session stays fun, controlled, and sustainable.
When you combine a lower roulette house edge with consistent, disciplined play, you give yourself the best chance to enjoy longer sessions and better long-term value while keeping the experience exciting and straightforward.
