Roulette looks simple on the surface: you place a bet, the wheel spins, and the ball lands in a numbered pocket. But the most important difference between European roulette and American roulette is not the vibe of the casino or the style of the table. It is one extra pocket on the wheel.
That one detail, single zero (0) versus double zero (0 and 00), changes the math behind every bet. The payouts are typically the same across both games, but the probabilities are not. And that gap is exactly where the house edge comes from.
This guide breaks down how European and American roulette differ, how the extra pocket impacts your odds, why some French rules like la partage can improve results on even-money bets, and what to check before you play if you want the best possible value.
Quick overview: the core difference in one sentence
European roulette has 37 pockets (0–36) while American roulette has 38 pockets (0–36 plus 00), and that extra 00 increases the house edge on standard bets from about 2.70% to roughly 5.26%.
European roulette: single zero (37 pockets)
In standard European roulette, the wheel has the numbers 1 through 36 plus a single 0, making 37 total pockets.
The key benefit of the single-zero format is simple: fewer total pockets means slightly better odds for the player on every bet (assuming standard payout rules).
European roulette basics
- Total pockets: 37 (numbers 0–36)
- Zero pockets: one (0)
- Typical house edge: about 2.70% on standard bets
- Common locations: widely found in Europe and online casinos, but also available globally depending on the operator
American roulette: double zero (38 pockets)
American roulette adds a second green pocket, 00, creating 38 total pockets (0, 00, and 1–36). That extra pocket may feel minor, but it has a major impact on expected value because payouts generally do not improve to compensate.
American roulette basics
- Total pockets: 38 (numbers 0, 00, 1–36)
- Zero pockets: two (0 and 00)
- Typical house edge: roughly 5.26% on standard bets
- Why it matters: the casino gets an additional outcome that causes most bets to lose, without changing the payout schedule
Nominal payouts are the same, but probabilities are different
One of the most important points for strategy-minded players is this: roulette usually keeps the same nominal payouts across wheel types. For example, an even-money bet still pays 1:1, a dozen bet still pays 2:1, and a straight-up number still pays 35:1.
What changes is the probability of winning, because you are competing against a different number of total pockets.
Example: even-money bets (Red/Black, Odd/Even, High/Low)
On an even-money bet, you have 18 winning numbers and 18 losing numbers, but the zero pocket(s) also cause a loss in standard rules.
- European roulette: 18 wins, 19 losses (18 opposite + 0) out of 37 total
- American roulette: 18 wins, 20 losses (18 opposite + 0 + 00) out of 38 total
The payout stays 1:1 in both cases, but you lose slightly more often on the American wheel, which is why the house edge is higher.
House edge comparison: European vs American (and French rules)
The house edge is a mathematical measure of the casino’s average advantage over time. It does not guarantee short-term outcomes, but it is extremely useful for comparing games with similar gameplay, like European roulette vs American roulette.
| Roulette type / rule set | Total pockets | Zero pockets | Typical house edge | Notes |
|---|---|---|---|---|
| European roulette (standard rules) | 37 | 1 (0) | About 2.70% | Single-zero wheel; common “best value” baseline |
| American roulette (standard rules) | 38 | 2 (0, 00) | Roughly 5.26% | Double-zero wheel; same payouts, higher casino advantage |
| French roulette with la partage (even-money bets) | 37 | 1 (0) | About 1.35% (on even-money bets) | Half your even-money stake returned when 0 hits |
| French roulette with en prison (even-money bets) | 37 | 1 (0) | About 1.35% (on even-money bets) | Your even-money stake is “imprisoned” and can be recovered on the next spin if it wins |
Notice the big takeaway: the best upgrades in player value come from either (1) choosing a single zero game instead of double zero, or (2) finding a single-zero game with French rules that improve even-money bet outcomes when zero appears.
What are la partage and en prison, and why do players like them?
Many players love roulette because it offers clear, simple bets. The downside of standard rules is that on even-money bets, the green zero is a full loss. French roulette adds rule variations that soften that impact.
La partage (best-known player-friendly rule for even-money bets)
La partage applies to even-money bets (like Red/Black, Odd/Even, High/Low). If the ball lands on 0:
- You lose only half your stake.
- The other half is returned to you.
Because the only “extra” losing outcome on a single-zero wheel is the 0 pocket, getting half back on that specific result cuts the effective house edge on even-money bets to about 1.35%.
En prison (similar value, slightly different feel)
En prison also applies to even-money bets on single-zero wheels. If the ball lands on 0:
- Your bet is not lost immediately.
- Instead, it is held “in prison” for the next spin.
- If your bet wins on the next spin, you get your stake back (typically with no profit).
- If it loses again, you lose the stake.
Over time, en prison creates a similar mathematical improvement to la partage on even-money bets, landing around the same 1.35% effective edge.
Wheel layout and table layout: what looks different at the casino?
Beyond the extra pocket, there are also physical and visual differences that players notice immediately.
Wheel differences
- European roulette wheel: includes 0 but not 00.
- American roulette wheel: includes both 0 and 00 (both green).
The specific order of numbers around the wheel is a separate topic (wheel sequence can differ by design), but for most players the practical impact is the number of zero pockets and the resulting probabilities.
Table layout differences
The betting grid also usually reflects the wheel type:
- European roulette tables have a single 0 space.
- American roulette tables have both 0 and 00 spaces.
This matters for gameplay because it affects where you place chips and how crowded certain bets can get, but the bigger impact is still mathematical: that extra 00 is another way your bet can lose.
Why the double zero increases the house edge so much
Roulette odds are driven by a simple formula: payouts are generally based on 36-to-1 style logic (reflecting 36 non-zero numbers), but the wheel contains either 37 or 38 pockets once you add the green zero pocket(s).
That mismatch is the casino advantage.
A simple way to see it (without heavy math)
- On a European single-zero wheel, the casino has 1 green pocket (0) that pushes outcomes away from “fair” payouts.
- On an American double-zero wheel, the casino has 2 green pockets (0 and 00), doubling the number of zero outcomes that typically make most bets lose.
Because the payouts usually do not increase to compensate for the extra 00 pocket, the player pays for that extra house advantage through lower expected returns over time.
Variance, betting limits, and why “strategy” feels different from table to table
Even when two casinos offer the same wheel type, your experience can still vary a lot. That is often due to differences in betting limits, table rules, and the specific bet mix you choose.
Betting limits change your risk profile
Roulette tables typically publish a minimum and maximum bet. These limits influence how volatile your sessions can be and how you manage your bankroll:
- Lower minimums can help you spread risk and play longer, especially if you like making multiple small bets.
- Lower maximums can cap aggressive progression systems (for example, doubling after losses), which can change how a strategy performs in the real world.
Inside vs outside bets: different variance, same underlying edge trend
Players often talk about “safe” bets versus “risky” bets. In roulette, this usually means:
- Outside bets (like Red/Black): hit more often but pay less, so swings can feel smoother.
- Inside bets (like straight-up numbers): hit less often but pay much more, so swings are bigger.
What stays consistent is that the wheel type still matters. Whether you prefer inside or outside bets, a single zero game tends to provide better expected value than a double zero game with the same payout rules.
European roulette vs American roulette: which should you choose?
If your goal is to get more value from your bankroll while still enjoying the classic roulette experience, the guidance is straightforward:
- Prefer European roulette (single zero) over American roulette (double zero) whenever you have the choice.
- If available, prioritize French roulette rules like la partage or en prison, especially if you play lots of even-money bets.
This is not about guaranteeing wins. It is about choosing a game where the built-in math is more favorable to the player over many spins.
What to check before you play: rules, RTP, and table details
Two roulette tables can look similar and still produce different long-term value depending on the fine print. A few quick checks can help you confidently pick the better option.
1) Confirm single zero vs double zero
Look at the layout or ask the dealer:
- Single green pocket (0) =European roulette/single zero.
- Two green pockets (0 and 00) =American roulette/double zero.
2) Check whether la partage or en prison is offered
These rules usually apply only to even-money bets, but they can meaningfully improve expected value on those bets. If you mostly play Red/Black or Odd/Even, this can be a big advantage.
3) Review any special rules that affect payouts or zero handling
Casinos and online platforms sometimes introduce rule tweaks (especially in branded variants). Your best move is to read the rules panel carefully, especially regarding:
- How zero outcomes are settled
- Whether any bets have modified payouts
- Whether special side bets exist (they may carry different edges)
4) Consider published RTP where available
Roulette is often discussed using house edge, but some platforms publish RTP (return to player) figures for specific games, like online blackjack. When RTP is provided, it can help you compare tables more precisely, particularly across different roulette variants.
Practical “best value” tips for intent-driven players
If you want a short checklist you can actually use before placing your first chip, here it is:
- Choose European roulette (single zero) over American roulette (double zero).
- If you play even-money bets, look for la partage or en prison to reduce the effective edge (commonly to about 1.35% on those bets).
- Match your bet sizing to the table limits so you can play the session you want, not the session the limits force.
- Pick bets that fit your variance preference: outside bets for smoother swings, inside bets for bigger hits and bigger droughts.
- Always verify the specific table rules, because roulette variants can differ even within the same casino.
FAQ: European roulette, American roulette, single zero, double zero
Is European roulette always better than American roulette?
From an odds perspective, a standard European roulette wheel (single zero) is typically better for the player than a standard American roulette wheel (double zero) because it usually has a lower house edge.
Do European roulette and American roulette pay the same?
In most standard games, yes: nominal payouts are the same (for example, 35:1 for a straight-up number and 1:1 for even-money bets). The difference is that the probabilities change due to the extra pocket in American roulette.
What does “double zero” mean in roulette?
Double zero means the wheel includes both 0 and 00 (two green pockets). This is the defining feature of American roulette.
What is la partage in roulette?
La partage is a rule commonly found in French-style single-zero roulette. On even-money bets, if the ball lands on 0, you lose only half your stake and the other half is returned, reducing the effective house edge on those bets to about 1.35%.
Bottom line: the smartest roulette choice is usually the simplest
If you remember only one thing, make it this: when deciding between European roulette and American roulette, the single zero versus double zero difference is not cosmetic. It directly changes your odds, and it is the main reason the house edge is about 2.70% on standard European tables versus roughly 5.26% on American wheels.
And if you want to upgrade your value even further, seek out French roulette rules like la partage (or en prison) to reduce the effective edge on even-money bets to about 1.35%.
Choose the right wheel, confirm the rules, and let the math work a little more in your favor while you enjoy the game.
