If you’re choosing between European vs American roulette, the best news is that the core game feels familiar either way: the same betting layout, the same inside and outside bets, and the same 35:1 payout for a straight-up number. The difference that matters most is simple and powerful: how many zero pockets the wheel has.
European roulette uses a single zero (0) for a total of 37 pockets.American roulette adds a double zero (00) for 38 pockets. That one extra pocket increases the casino’s advantage and reduces your long-run return, which is why understanding roulette odds, roulette house edge, and RTP (return to player) is such a high-impact move for any player.
The One Change That Drives Everything: Single Zero vs Double Zero
Every roulette bet has two key ingredients:
- Probability: how often you can expect to win.
- Payout: how much you’re paid when you win.
The payouts for standard roulette bets are the same on European and American wheels. So when the wheel adds an extra pocket (00), your chance of hitting your chosen outcome drops slightly, but your payout does not increase to compensate. That gap becomes the house edge.
Quick pocket counts and single-number chances
- Single zero roulette (European): 37 pockets (numbers 1–36 plus 0) so the chance for a specific number is 1/37.
- Double zero roulette (American): 38 pockets (numbers 1–36 plus 0 and 00) so the chance for a specific number is 1/38.
That looks like a tiny difference, but it drives a major shift in long-run value.
European vs American Roulette: House Edge and RTP Compared
The most searched comparison terms in roulette are roulette house edge and RTP, because they summarize how favorable a table is over time.
On a standard wheel with standard payouts:
- European roulette house edge is about 2.70% (RTP about 97.30%).
- American roulette house edge is about 5.26% (RTP about 94.74%).
In other words, the American wheel roughly doubles the house edge versus a standard European wheel.
Why those percentages are what they are (straight-up example)
A straight-up bet pays 35:1. If you stake 1 unit:
- European: win probability 1/37. Expected value is (1/37 × 35) − (36/37 × 1)=−1/37≈−2.70%.
- American: win probability 1/38. Expected value is (1/38 × 35) − (37/38 × 1)=−2/38≈−5.26%.
This same edge carries through standard bets because the wheel’s extra zero affects all outcomes.
Comparison table: the core numbers at a glance
| Game type | Pockets | Zeros | House edge (standard rules) | RTP (standard rules) |
|---|---|---|---|---|
| European roulette | 37 | 0 | ≈ 2.70% | ≈ 97.30% |
| American roulette | 38 | 0 and 00 | ≈ 5.26% | ≈ 94.74% |
La Partage and En Prison: The European Rule Variants That Improve RTP
One of the biggest advantages you can find at certain single zero roulette tables is a special rule for even-money bets: la partage or en prison. These rules don’t usually apply to inside bets; they mainly benefit outside, even-money wagers like red/black, odd/even, and high/low.
What is la partage?
La partage means “sharing.” If you place an even-money bet and the ball lands on 0, you lose only half your stake instead of the full amount.
- Example: Bet 10 on red. If 0 hits, you lose 5 (not 10).
What is en prison?
En prison means “in prison.” If you place an even-money bet and 0 hits, your bet is “imprisoned” and typically carries over to the next spin:
- If your bet wins on the next spin, you usually get your stake back (effectively a push).
- If it loses on the next spin, you lose the stake.
In long-run math terms, en prison produces the same effective advantage as la partage for those even-money bets.
How much do these rules change the house edge?
On even-money bets in European roulette:
- Standard European rules: house edge ≈2.70%.
- With la partage or en prison: house edge ≈1.35% (about half).
That’s a meaningful boost in value, especially for players who like lower-volatility outside bets.
| Even-money bet ruleset | Typical outcome when 0 hits | Effective house edge | Effective RTP |
|---|---|---|---|
| European (standard) | Lose full stake | ≈ 2.70% | ≈ 97.30% |
| European with la partage | Lose half stake | ≈ 1.35% | ≈ 98.65% |
| European with en prison | Stake carried to next spin (push if win) | ≈ 1.35% | ≈ 98.65% |
| American (standard) | Lose full stake on 0 or 00 | ≈ 5.26% | ≈ 94.74% |
Same Bets, Same Payouts: What Doesn’t Change
A helpful way to stay confident at any table is to remember what is consistent across both versions. Other casino games like blackjack follow different rules and math, so treat each game on its own terms.
Inside vs outside bets
Both European and American roulette offer:
- Inside bets: placed on specific numbers or small groups (straight-up, split, street, corner, six line).
- Outside bets: placed on broader categories (dozens, columns, red/black, odd/even, high/low).
Straight-up payout is still 35:1
A straight-up bet pays 35:1 in both games. That’s why the extra 00 in double zero roulette has such an impact: the payout remains fixed while the chance of winning drops.
Wheel Layout Differences: Why the Table Can Feel Different
Beyond the number of zeros, there’s another difference players often notice: the physical ordering of numbers on the wheel. European and American wheels commonly use different sequences. This does not change the mathematical odds of a fair wheel, but it can affect:
- Player comfort: some people find one layout easier to track visually.
- Dealer and table flow: the game can feel faster or smoother depending on the setup.
- Pattern chasing temptation: the layout can make “clusters” look meaningful even though each spin is independent.
The key takeaway stays the same: zeros drive the edge. Layout is a secondary factor compared to the 0 vs 00 ruleset.
Roulette Odds by Bet Type: How the Zeros Show Up in Real Play
Because the game has fixed payouts, the extra pocket in American roulette affects every bet type. Here’s a practical view of how odds differ.
Probability highlights (European vs American)
- Straight-up (1 number): European 1/37, American 1/38.
- Split (2 numbers): European 2/37, American 2/38.
- Red or black: European 18/37, American 18/38.
- Dozens / columns: European 12/37, American 12/38.
Even when the difference looks small, it adds up over many spins. That’s exactly why RTP comparisons matter: you’re optimizing the rules, not trying to “outguess” randomness.
Volatility and Strategy: Picking the Best Version for Your Style
Roulette strategy is less about changing the built-in math and more about aligning your bets with your goals: smoother swings, bigger peaks, longer sessions, or sharper thrills.
European roulette benefits
- Higher RTP than American roulette under standard rules.
- Lower house edge, which supports longer play for the same budget.
- Potential access to la partage or en prison for an even better deal on even-money bets.
American roulette benefits
- Often widely available in some venues and online lobbies.
- Same familiar bet types and payouts, making it easy to learn and play.
What “volatility” looks like in roulette
- Inside bets (like straight-up) are typically higher volatility: you win less often, but wins are larger.
- Outside bets (like red/black) are typically lower volatility: you win more often, but wins are smaller.
If you prefer steadier swings, even-money bets on a European wheel with la partage or en prison can be a particularly player-friendly combination because it improves the effective edge and keeps outcomes smoother.
RTP in Real Terms: A Simple Budget Example
RTP is a long-run average, not a promise for any single session. Still, it’s useful for comparing tables.
Imagine 1,000 units wagered over time (not necessarily in one bet):
- European roulette at ≈97.30% RTP implies an average return of ≈973 units, with ≈27 units as the house edge.
- American roulette at ≈94.74% RTP implies an average return of ≈947.4 units, with ≈52.6 units as the house edge.
The difference is about 25.6 units per 1,000 units wagered on average. That gap is why many players actively seek single zero roulette when they have a choice.
How to Choose the Best Roulette Table: A Quick Checklist
If you want a practical, high-confidence approach, use this order of operations before you place your first chip.
- Prefer single zero roulette (European) over double zero roulette (American).
- For even-money betting, look for la partage or en prison rules.
- Compare the table’s stated RTP if it’s provided, but verify the rule set (zeros and special rules) because that’s what drives RTP.
- Pick bets that match your volatility preference (outside for smoother, inside for bigger swings).
- Set a session budget and stop point so the game stays fun and controlled.
European vs American Roulette FAQ
Is European roulette always better than American roulette?
From a strict math perspective under standard rules, European roulette typically offers a better deal because the house edge is lower (≈2.70% vs ≈5.26%). If the European table also offers la partage or en prison on even-money bets, it can be better still for that bet category.
Do la partage and en prison help on all bets?
They primarily help even-money outside bets (red/black, odd/even, high/low). They typically do not apply to inside bets like straight-up numbers.
Do betting systems change the house edge?
Betting progressions can change how your wins and losses are distributed (your volatility and risk of larger drawdowns), but they do not remove the built-in house edge of the wheel. The most reliable way to improve your position is choosing a better ruleset: single zero, and ideally la partage or en prison for even-money play.
What should I prioritize if I only remember one tip?
Prioritize the zeros: choose single zero roulette whenever possible, and treat double zero roulette as a less favorable alternative when you have no other option.
Bottom Line: The Best Odds Come From the Best Rule Set
When comparing European vs American roulette, the winning move isn’t complicated: pick the wheel with fewer zeros. European roulette’s single zero format delivers a much lower roulette house edge and a higher RTP than double zero roulette. And if you can find a European table with la partage or en prison, you’re getting one of the most player-friendly standard roulette options available for even-money bets.
Choose smart rules, match your bets to your style, and you’ll get more value from every spin while keeping the game as enjoyable as it’s meant to be.
