Roulette looks wonderfully simple: pick a number, choose red or black, or build a spread of bets—then let the wheel decide. But one detail quietly drives almost everything that matters to players: how many zero pockets are on the wheel.
The key takeaway is straightforward and highly actionable: European roulette has one zero (0), while American roulette adds a double zero (00). That extra pocket may look minor, but it meaningfully shifts the probabilities and effectively nearly doubles the casino advantage on most bets.
Below is a clear, practical breakdown of European vs American roulette—covering wheel layout, house edge percentages, special rules like en prison and la partage, table markings, and what these differences mean for strategy and value.
At-a-Glance Comparison: European vs American Roulette
If you want the fastest way to compare the two games, start here.
| Feature | European Roulette | American Roulette |
|---|---|---|
| Number of pockets | 37 (1–36 + 0) | 38 (1–36 + 0 + 00) |
| Zeros | Single zero (0) | Single zero (0) and double zero (00) |
| Typical house edge | About 2.70% | About 5.26% |
| Payouts | Same standard payouts | Same standard payouts |
| Common special rules | May offer en prison or la partage (often on even-money bets) | Typically no equivalent rule in most standard games |
| Where you’ll often see it | Common in Europe and widely available online | Dominant in many US land casinos |
The Core Difference: Wheel Layout and the Extra Zero
Both versions include numbers 1 through 36, with the same mix of red and black (18 red, 18 black). The difference is the green zero area:
- European roulette has one green pocket: 0.
- American roulette has two green pockets: 0 and 00.
That single design choice is responsible for the biggest practical difference players experience: house edge and probability.
House Edge Explained (With Accurate Percentages)
Roulette’s payouts are standardized (for example, a straight-up bet pays 35 to 1). Importantly, those payouts were designed around a wheel conceptually closer to a 36-number game—yet the real wheels include at least one zero pocket that creates the casino advantage.
European Roulette House Edge (Single Zero)
European roulette has 37 pockets. For most standard bets, the house edge is:
1 / 37 = 0.027027… = about 2.70%
This is why you’ll often see the European roulette house edge cited as 2.70% (more precisely, about 2.7027%).
American Roulette House Edge (Double Zero)
American roulette has 38 pockets. For most standard bets, the house edge becomes:
2 / 38 = 0.052631… = about 5.26%
That means the American wheel’s casino advantage is almost double the European wheel’s advantage, even though the betting menu and payouts look the same.
Why Payouts Stay the Same Even Though Odds Change
A common (and very reasonable) question is: if American roulette adds a pocket, shouldn’t payouts improve to compensate?
In standard roulette, payouts typically do not change between versions. For example:
- 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
- Dozens / columns: pays 2 to 1
- Even-money bets (red/black, odd/even, high/low): pays 1 to 1
Because payouts don’t improve to offset the extra 00, the expected return to the player decreases on the American wheel.
Probability Differences You Can Feel at the Table
Probability is where the “single zero vs double zero” distinction becomes crystal clear. Here are the most commonly played bets and how the odds shift.
Even-Money Bets (Red/Black, Odd/Even, High/Low)
These bets feel close to 50/50, but the zero pockets create the edge.
| Bet Type | European Roulette (37 pockets) | American Roulette (38 pockets) |
|---|---|---|
| Win outcomes | 18 / 37 (about 48.65%) | 18 / 38 (about 47.37%) |
| Lose outcomes (includes zeros) | 19 / 37 (about 51.35%) | 20 / 38 (about 52.63%) |
That difference may look small per spin, but roulette is a repeated game. Over many spins, the American wheel’s extra zero has more chances to turn “nearly even” into “noticeably negative.”
Straight-Up Bets (Single Number)
A straight-up bet is the most exciting and volatile option: one number, big payout.
- European: 1 / 37 chance to hit (about 2.70%)
- American: 1 / 38 chance to hit (about 2.63%)
The hit rate difference is subtle, but the long-term cost still reflects the house edge difference because the payout remains 35 to 1 in both versions.
Special European Rules That Can Improve Value: La Partage and En Prison
One of the most player-friendly aspects commonly associated with European-style games (especially French roulette) is the presence of rules that soften the impact of the zero—specifically on even-money bets.
La Partage (Often the Simplest Benefit)
La partage typically means: if you place an even-money bet (like red/black) and the ball lands on 0, you lose only half your bet instead of the full amount.
When applied to even-money bets, la partage can reduce the house edge from about 2.70% to about 1.35%.
En Prison (Similar Math, Different Feel)
En prison usually means: on an even-money bet, if the ball lands on 0, your bet is “imprisoned” for the next spin. On the next spin:
- If your bet wins, you get your stake back (typically without profit).
- If it loses, you lose your stake.
Like la partage, en prison can also reduce the effective house edge on even-money bets to about 1.35% (under common implementations).
Why These Rules Matter Strategically
These rules don’t change roulette into a positive-expectation game, but they do deliver a tangible improvement in value for players who enjoy:
- Lower volatility sessions with red/black or high/low
- More time at the table for the same bankroll
- Cleaner probability planning (because the “zero penalty” is softened)
Important: These rules are not universal in every European-branded game. When comparing tables (online or in-person), confirming whether la partage or en prison is offered can be one of the highest-impact checks you make.
Wheel Order and Table Markings: What You’ll Notice Visually
European and American roulette don’t just differ by 00. The physical wheel sequence and table layout also vary, which can affect familiarity, comfort, and how quickly you place bets.
Wheel Number Sequence (European vs American)
Roulette wheels do not list numbers in simple numerical order. Instead, they use a fixed sequence designed to distribute high and low numbers and reds and blacks around the wheel.
Common sequences are:
- European wheel: begins 0, 32, 15, 19, 4, 21, 2, 25, … and continues through all 37 pockets.
- American wheel: begins 0, 28, 9, 26, 30, 11, 7, 20, … and includes 00 as a distinct pocket (commonly positioned between 1 and 27 in the standard sequence).
For most players, wheel order is primarily about recognition and tradition. For probability, what matters most is still the total number of pockets and zeros.
Table Layout Differences
On the betting felt, the most noticeable marking difference is the zero area:
- European table: a single 0 box, typically positioned at the top of the number grid.
- American table: both 0 and 00 boxes, usually stacked or placed side-by-side in the zero area.
European and French layouts may also emphasize certain classic outside betting areas and, in some formats, show additional labeling that supports announcements or side-call bets.
Where Each Version Is Common (Land Casinos vs Online)
Knowing what you’re likely to encounter can help you plan ahead—especially if you’re traveling or switching between in-person and online play.
- American double-zero roulette is widely found in many US land-based casinos and is often the default roulette experience in that market.
- European single-zero roulette is common across Europe and is also extremely prevalent in online casinos, where single-zero wheels are frequently offered.
This is one reason “single zero vs double zero” has become such a strong comparison topic: many players can realistically choose between the two versions online, and that choice directly impacts expected value.
Strategy Implications: How to Make the Most of the Better Odds
Roulette is a negative-expectation game in standard form, so “winning strategies” should be framed the right way: not as guarantees, but as smart decision-making that improves value, reduces cost, and supports a more enjoyable session.
1) Prioritize Single-Zero Wheels When You Have a Choice
If you can choose between European and American roulette with the same limits and comfort level, the European wheel’s lower house edge is a meaningful advantage for the player experience:
- Lower expected loss rate per unit wagered
- More efficient bankroll use
- Cleaner math when comparing bets or planning session length
This is one of the rare “strategy” steps in roulette that is both simple and genuinely impactful: pick the better ruleset.
2) Even-Money Bets Pair Well With La Partage or En Prison
If a European-style game offers la partage or en prison, even-money bets become particularly attractive for players who value steady pacing.
With these rules, the effective house edge on even-money bets can be about 1.35%, which is a notable improvement over standard European roulette.
3) Understand Volatility: Payout Size Doesn’t Change the House Edge
Many players naturally assume riskier bets are “worse” and safer bets are “better.” In roulette, most standard bets share the same house edge within a given wheel type. What changes is the volatility:
- Straight-up bets: high variance, big swings, long droughts possible
- Outside bets: lower variance, more frequent small wins
A practical way to use this: match bet selection to your session goals. If you want longer playtime and smoother results, outside bets can feel more comfortable. If you enjoy high excitement and don’t mind swings, inside bets deliver that experience.
4) Be Cautious With Betting Systems That Promise Certainty
Progressions can change how your results look in the short term, but they do not remove the house edge. If you enjoy structured staking, keep it benefit-driven and realistic:
- Use a budget and decide your maximum stake in advance
- Choose table limits that can support your staking plan
- View systems as a pacing tool, not a guarantee
The most reliable “edge” in roulette remains game selection (single zero, and favorable rules when available), not a pattern-based approach.
Quick Math Example: Expected Cost Per 100 Units Wagered
House edge is easiest to interpret as a long-run average cost relative to total amount wagered.
- European roulette at about 2.70%: expected loss is about 2.70 units per 100 units wagered.
- American roulette at about 5.26%: expected loss is about 5.26 units per 100 units wagered.
That difference adds up quickly across long sessions or higher stakes. For players who enjoy roulette regularly, choosing single-zero versions can be a consistent, compounding benefit.
European vs American Roulette: Which Should You Choose?
Here’s a player-first, practical way to decide—based on what you value most.
Choose European Roulette If You Want:
- Better odds (lower house edge)
- A strong chance to find single-zero games online
- Potential access to la partage or en prison on even-money bets
- More efficient bankroll use over time
Choose American Roulette If You Want:
- The classic experience commonly found in many US land casinos
- To play what’s available at a specific venue, especially when table selection is limited
From a pure value perspective, the single-zero wheel is the clear favorite. From an experience perspective, both are fun, familiar, and easy to learn—so if you’re playing for entertainment, the best choice can also be the table with the right vibe, limits, and pace.
FAQ: Common Questions About Single Zero vs Double Zero
Is European roulette “easier to win” than American roulette?
European roulette offers better probabilities and a lower house edge because there is only one zero pocket. That improves expected value, but it does not guarantee short-term outcomes.
Do the bets and payouts change between European and American roulette?
Standard bet types and payouts are generally the same. The difference is that American roulette adds the 00, changing the odds while keeping payouts unchanged—raising the house edge.
What are la partage and en prison, and do they always apply?
They are special rules often found in European-style (especially French) roulette that reduce losses on even-money bets when the result is 0. Availability varies by table and casino.
Is online roulette more likely to be European?
Many online platforms offer online blackjack and single-zero European roulette alongside other variants. Because the roulette lobby often includes multiple table types, players may have more opportunities online to choose the lower-edge option.
Bottom Line: The Extra Zero Is the Whole Game
European and American roulette share the same iconic feel and the same betting options—but the wheel design changes the math in a big way. With 37 pockets and a house edge of about 2.70%, European roulette generally offers better value than American roulette, which uses 38 pockets and carries a house edge around 5.26%.
If you take one actionable tip away, make it this: when you can choose, favor single-zero roulette. And if you can find a European-style table with la partage or en prison on even-money bets, you’re aligning your play with some of the most player-friendly standard roulette conditions available.
Responsible play note: Roulette is designed for entertainment. Set a budget, stick to it, and treat any session as paid fun rather than a financial plan.
