Roulette looks simple on the surface: place a bet, watch the wheel spin, and see where the ball lands. But one small design choice on the wheel can make a big difference to your long-term results. The main distinction between European roulette and American roulette is the number of pockets on the wheel, and that directly drives the casino’s mathematical advantage (the house edge).
If your goal is to get more play time from the same bankroll, reduce expected losses over the long run, and make smarter table choices, understanding this difference is one of the highest-impact “wins” you can get before you place a single chip.
The core difference in one sentence
European (and French) roulette uses a single-zero wheel with 37 pockets (0 to 36), while American roulette uses a double-zero wheel with 38 pockets (0, 00, and 1 to 36), and that extra 00 raises the house edge.
European vs American roulette at a glance
| Feature | European / French Roulette | American Roulette |
|---|---|---|
| Wheel pockets | 37 pockets (0 to 36) | 38 pockets (0, 00, and 1 to 36) |
| Zeros | Single zero (0) | Single zero (0) plus double zero (00) |
| Straight-up payout (single number) | 35:1 (same as American) | 35:1 (same as European) |
| Typical house edge (most bets) | About 2.70% | About 5.26% |
| French rule options on even-money bets | May include la partage or en prison, lowering edge on those bets | Typically not used |
| Best for players who want | Lower expected loss and longer sessions | Familiar layout in many US casinos, but higher expected loss |
Wheel layout: what actually changes on the table and wheel
European roulette wheel (single zero)
A European wheel contains numbers 1 through 36 plus a single 0. That means every bet you place is competing against 37 equally likely outcomes (assuming a fair wheel and typical casino conditions).
American roulette wheel (double zero)
An American wheel contains numbers 1 through 36 plus 0 and 00. So your bet is competing against 38 possible outcomes.
That one additional pocket may seem minor, but it increases the chance that the ball lands on a green zero pocket, which tends to be unfavorable for many common bets (especially the popular even-money options).
Why the house edge is higher in American roulette (with simple math)
Both European and American roulette usually pay 35:1 on a straight-up bet (a bet on a single number). The key point is that the payout does not increase when a wheel adds an extra pocket. So the player is facing more possible losing outcomes without getting compensated by higher winnings.
European roulette house edge (single zero)
On a single-number bet in European roulette:
- Probability of winning = 1 out of 37
- Probability of losing = 36 out of 37
- Payout = 35:1 (you win 35 units of profit, and typically keep your 1 unit stake)
You can express the expected value (EV) for a 1-unit straight-up bet like this:
EV = (1/37) * (+35) + (36/37) * (-1) = (35/37) - (36/37) = -1/37 ≈ -0.02703 (-2.703%)That is where the commonly cited European roulette house edge of about 2.70% comes from.
American roulette house edge (double zero)
On a single-number bet in American roulette:
- Probability of winning = 1 out of 38
- Probability of losing = 37 out of 38
- Payout = 35:1
EV = (1/38) * (+35) + (37/38) * (-1) = (35/38) - (37/38) = -2/38 = -1/19 ≈ -0.05263 (-5.263%)That yields the widely cited American roulette house edge of about 5.26%.
What “house edge” means in practical, player-friendly terms
House edge is not a promise of what will happen in a short session. You can win (or lose) on either wheel in the short run. Instead, house edge is a long-run average that shows how much the game costs, statistically, per unit wagered.
One helpful way to think about it is this: for every 100 units you wager in total over time (not your starting bankroll, but your total action), the expected loss is about:
- European roulette:~2.7 units per 100 units wagered
- American roulette:~5.26 units per 100 units wagered
Because roulette involves many spins, that difference can translate into noticeably different session length for the same budget, especially for players who enjoy lower-volatility bets like red/black or odd/even.
French roulette rules that can improve the deal on even-money bets
French roulette typically uses the same single-zero wheel as European roulette, but some French tables also offer special rules that apply specifically to even-money bets (also called “outside bets”), such as:
- Red / Black
- Odd / Even
- High (19–36) / Low (1–18)
Two famous rule variants can reduce the casino advantage on these bets when the ball lands on zero:
La partage
If you place an even-money bet and the result is 0, you lose only half your bet (the other half is returned to you). This effectively cuts the house edge on those even-money bets in half compared to standard European rules.
En prison
If you place an even-money bet and the result is 0, your bet is “imprisoned” for the next spin instead of being lost immediately. If your bet wins on the next spin, you typically get your stake back (not a profit). If it loses, you lose it. In expectation, this produces a similar reduction in house edge to la partage for even-money bets.
What this does to the house edge (even-money bets)
Under standard European single-zero rules, even-money bets carry the same overall house edge as the game: about 2.70%. With la partage or en prison, the edge on even-money bets drops to about 1.35%.
In other words, if you enjoy betting red/black or odd/even, a French roulette table with these rules can be one of the most player-friendly mainstream roulette options you can find.
Do the odds change for different bet types?
The payouts are usually the same between European and American roulette, but the probabilities differ because the number of pockets differs. That affects every bet type.
Examples (single-zero European vs double-zero American):
- Straight-up (1 number): win probability is 1/37 vs 1/38
- Split (2 numbers): win probability is 2/37 vs 2/38
- Street (3 numbers): win probability is 3/37 vs 3/38
- Corner (4 numbers): win probability is 4/37 vs 4/38
- Dozen or column (12 numbers): win probability is 12/37 vs 12/38
- Even-money bets (18 numbers): win probability is 18/37 vs 18/38
Because payouts generally don’t increase to compensate for the extra pocket in American roulette, the expected value becomes worse across the board.
What to choose if your goal is lower long-term loss
If you care about getting the best value per spin, the decision is straightforward: Alternatively, you might play blackjack online
- Choose European roulette over American roulette when possible, because the single-zero wheel offers a materially lower house edge.
- If you see French roulette with la partage or en prison rules and you like even-money bets, that can be an even stronger choice.
This doesn’t guarantee a winning session, but it does improve the math that controls your results over many spins.
How to identify the best roulette table (quick checklist)
You don’t need advanced theory to make a smart roulette choice. You need a fast, reliable way to evaluate the table in front of you.
1) Confirm the wheel type: single zero vs double zero
- Look for 0 only (European/French).
- Look for 0 and 00 (American).
2) Ask about special rules on even-money bets
If it’s a French-style table, ask whether la partage or en prison applies to your even-money bets. Those rules can meaningfully reduce the expected cost of betting outside options.
3) Check the table limits before you buy in
Limits can shape your entire session experience:
- Minimum bet: determines how quickly your bankroll cycles through spins.
- Maximum bet: matters if you plan to press wins or use any progressive staking approach.
A lower house edge helps, but a table minimum that is too high for your budget can still shorten your session.
4) Understand the bet rules and layout used at that table
Most roulette tables follow standard rules, but operational details can vary. Knowing the layout and how bets are called and placed helps you avoid mistakes that cost money (like placing a chip slightly off the intended line).
Bankroll planning: factoring the edge into your session
One of the most practical benefits of choosing European or French roulette is that it can support more sustainable bankroll management. Since the house edge is lower, your bankroll typically lasts longer for the same style of play and total amount wagered.
A simple way to think about it
Two players might both start with the same bankroll and place the same style of bets, but the player on the single-zero game is, on average, giving up less per unit of action. Over many spins, that can translate into:
- More spins for the same budget
- More time to hit favorable short-term variance (winning streaks do happen)
- A smoother entertainment cost, especially on even-money bets with French rules
Roulette is still a negative-expectation game, but if entertainment value and longevity matter, reducing the edge is a direct quality upgrade.
Strategy decisions: what changes (and what doesn’t)
Many roulette “systems” focus on changing bet sizes after wins or losses. It’s important to know what the European vs American difference can and cannot do for your strategy decisions.
What doesn’t change
- Roulette outcomes are independent: past spins do not change future probabilities.
- Payout tables are typically fixed: a straight-up bet still pays 35:1 in both versions.
- No staking system removes the house edge: changing bet size doesn’t change the underlying math of the wheel.
What does change (in your favor) with single-zero and French rules
- Lower house edge improves expected results: the “cost” of each unit of action is smaller.
- Even-money bets can be especially strong on French tables: with la partage or en prison, the edge on those bets drops to about 1.35%.
- Your bankroll can stretch further: which can make your chosen betting approach feel less pressured by the math over time.
A realistic “best strategy” mindset for roulette is: select the best rules (single zero, plus French even-money rules if available), then bet in a way that fits your budget and preferred volatility.
Example scenarios: how the choice can affect expected cost
To keep this grounded and practical, consider a simplified comparison. Imagine you place even-money bets (like red/black) repeatedly over time. The exact number of spins and outcomes will vary, but the expected cost per unit wagered is driven by the house edge.
- European single-zero (standard rules): expected loss is about 2.7 units per 100 units of total action.
- French roulette with la partage on even-money bets: expected loss on those bets is about 1.35 units per 100 units of total action.
- American double-zero: expected loss is about 5.26 units per 100 units of total action.
The takeaway is not that you “will” lose those amounts in a single session. The takeaway is that the single-zero and French-rule tables offer better value for the same entertainment spend.
European vs French roulette: are they the same?
They are closely related, and both typically use the same single-zero wheel. In many everyday conversations, “European roulette” is used as shorthand for a single-zero game. “French roulette” often refers to tables that may include French-language markings and, importantly, may offer the la partage or en prison rule on even-money bets.
If you are choosing between the two, the wheel is already a strong start (single zero). Then your next value check is whether the table offers those even-money rules.
Frequently asked questions
Is European roulette always better than American roulette?
From a mathematical expected-loss perspective, yes: the single-zero wheel produces a lower house edge than the double-zero wheel when payouts are the same. That makes European roulette the more favorable option for players in the long run.
Does the 35:1 payout make roulette fair?
No. If roulette were “fair” on a single-number bet, the payout would need to reflect all possible outcomes. With 37 pockets, a fair payout would be 36:1 (profit) rather than 35:1. The gap between the fair payout and the actual payout is part of what creates the house edge.
If I only play outside bets like red/black, does the wheel type still matter?
Yes. The extra 00 in American roulette increases the frequency of green outcomes relative to the total number of pockets. That worsens the expected value of even-money bets compared to a single-zero wheel, and French rules can improve it further on some tables.
Can I “beat” roulette by switching tables?
Choosing European or French roulette can improve your expected results and reduce the house edge, but it does not turn roulette into a positive-expectation game under normal rules. What it can do is give you better value, more time, and a smarter starting point.
Bottom line: the best roulette choice for most players
If you want the most player-friendly mainstream roulette option, choose in this order when available:
- French roulette with la partage or en prison (especially if you like even-money bets)
- European roulette (single-zero) with standard rules
- American roulette (double-zero) only if single-zero tables are not an option
That one extra 00 pocket is the entire story: it raises the house edge from about 2.7% to about 5.26%. When you select a single-zero game, you are making a clear, measurable upgrade to your roulette experience: lower expected cost, more runway for your bankroll, and a better foundation for any betting style you enjoy.
