If you’re comparing European vs American roulette, the biggest difference isn’t the color of the felt or the dealer’s patter—it’s the wheel itself. One extra pocket (the 00) in American roulette changes the math in a very real way, doubling the casino’s advantage on most bets.
That’s great news for players who like clarity, because roulette is one of the easiest casino games to evaluate: you can see the pockets, calculate probabilities, and understand the roulette house edge before you place a single chip.
This guide breaks down pocket counts, exact house-edge percentages, how French roulette rules like French roulette en prison and La Partage improve player odds, and what typically changes between online and brick-and-mortar roulette tables. You’ll also find probability tables and example bets to make the numbers feel practical.
Quick comparison: European vs American vs French roulette
All standard roulette games pay the same on the same bet types (for example, a straight-up number pays 35:1). What changes is the wheel composition and, sometimes, special rules that apply when the ball lands on zero.
| Roulette type | Pockets on wheel | Zero pockets | Typical house edge | Best-known advantage |
|---|---|---|---|---|
| European roulette | 37 | 0 | ~ 2.70% | Lower edge than American due to single zero |
| American roulette | 38 | 0 and 00 | ~ 5.26% | More pockets, same payouts (higher casino advantage) |
| French roulette (European variant) | 37 | 0 | ~ 2.70% (standard) | Often includes La Partage or En Prison on even-money bets, reducing edge to ~ 1.35% on those bets |
The core difference: wheel design and pocket count
European roulette wheel: 37 pockets
A European roulette wheel contains numbers 1 to 36 plus a single 0, for a total of 37 pockets. Because payouts are based on 36-to-1 odds for many bets (e.g., a straight-up number pays 35:1), that extra “unpaid” pocket (the zero) is where the casino’s edge comes from.
American roulette wheel: 38 pockets
An American roulette wheel contains numbers 1 to 36 plus 0 and 00, for a total of 38 pockets. The payouts remain the same as in European roulette, but the extra 00 increases the likelihood that players lose on many common bets—raising the house edge.
Exact roulette house edge: 2.70% vs 5.26%
The roulette house edge is the long-run average amount the casino expects to keep from each bet. The simplest way to see it is with even-money bets (like Red/Black, Odd/Even, High/Low), because they’re intuitive and widely played.
European roulette house edge: ~ 2.70%
On a European wheel:
- There are 18 red numbers and 18 black numbers.
- The single 0 is green and causes even-money bets to lose (under standard rules).
So, on a Red bet:
- Win probability =18 / 37≈48.65%
- Lose probability =19 / 37≈51.35% (this includes landing on 0)
The standard European roulette house edge is:
1 / 37≈2.70%
American roulette house edge: ~ 5.26%
On an American wheel, the same Red bet has:
- Win probability =18 / 38≈47.37%
- Lose probability =20 / 38≈52.63% (this includes 0 and 00)
The standard American roulette house edge is:
2 / 38≈5.26%
That’s why, for many players, “choose European when you can” is one of the clearest value moves in casino gaming: you’re playing the same familiar bet types with about half the built-in disadvantage.
French roulette rules: La Partage and En Prison (and why they matter)
French roulette is typically played on a European-style wheel (37 pockets, single zero). What often makes it special is how it treats even-money bets when the ball lands on 0.
Two classic rules are:
- La Partage
- En Prison (often searched as French roulette en prison)
Both rules can significantly improve player odds on even-money bets by cutting the effective house edge in half.
La Partage: “half back” on zero
With La Partage, if you place an even-money bet and the ball lands on 0, you lose only half your stake (instead of the full amount).
That changes the expected loss:
- Probability of 0 in European/French wheel =1 / 37
- Loss on 0 under La Partage (even-money bets) =50% of stake
Effective house edge on even-money bets becomes:
(1 / 37) × 1/2 = 1 / 74≈1.35%
En Prison: “imprisoned” bet on zero
With En Prison, if an even-money bet hits 0, your bet is “imprisoned” for the next spin instead of immediately losing.
- If your bet wins on the next spin, you get your original stake back (typically without profit).
- If your bet loses on the next spin, you lose the stake.
- If 0 lands again, the bet may remain imprisoned (house rules vary by casino).
In many standard implementations on a single-zero wheel, the long-run effect for even-money bets is similar to La Partage, producing an effective edge of about 1.35% on those bets.
Player-friendly takeaway: If you like even-money bets for steadier swings, French roulette with La Partage or En Prison can be one of the best roulette rule sets you’ll commonly encounter.
Probabilities at a glance (with a table you can actually use)
Below are practical probabilities for common outcomes. These help you compare the feel of European vs American roulette in a concrete way.
Single-spin probabilities: European vs American
| Outcome | European (37 pockets) | American (38 pockets) |
|---|---|---|
| Hit a specific number (straight-up) | 1 / 37 ≈ 2.70% | 1 / 38 ≈ 2.63% |
| Hit any green zero pocket(s) | 1 / 37 ≈ 2.70% | 2 / 38 ≈ 5.26% |
| Win Red (or Black) | 18 / 37 ≈ 48.65% | 18 / 38 ≈ 47.37% |
| Lose Red (including green) | 19 / 37 ≈ 51.35% | 20 / 38 ≈ 52.63% |
House edge by variant and bet type (key distinctions)
Under standard roulette payouts, the underlying house edge is consistent across bet types within a given wheel design. The major exception is when French rules modify outcomes on zero for even-money bets.
| Variant | Wheel | Even-money bets (Red/Black, Odd/Even, High/Low) | Other bets (typical) |
|---|---|---|---|
| European (standard rules) | Single zero | ~ 2.70% | ~ 2.70% |
| American (standard rules) | Double zero | ~ 5.26% | ~ 5.26% |
| French with La Partage | Single zero | ~ 1.35% | ~ 2.70% (La Partage typically applies only to even-money bets) |
| French with En Prison | Single zero | ~ 1.35% (common effective result) | ~ 2.70% (typically unchanged for non even-money bets) |
Example bets: how the numbers play out in real money
Seeing expected value in dollars (or euros) makes the difference between roulette variants feel immediate—especially if you play lots of spins.
Example 1: $10 on Red (even-money)
European roulette (standard rules)
- Win: 18/37, profit = +$10
- Lose: 19/37, loss = −$10
Expected value (EV):
EV = (18/37 × 10) + (19/37 × -10) = -10/37 ≈ -$0.27
That aligns with the ~2.70% house edge: about $0.27 expected loss per $10 bet, on average over time.
American roulette (standard rules)
- Win: 18/38, profit = +$10
- Lose: 20/38, loss = −$10
EV = (18/38 × 10) + (20/38 × -10) = -20/38 ≈ -$0.53
That’s the ~5.26% edge in action: about $0.53 expected loss per $10 bet.
Example 2: $10 on Red with French La Partage
In French roulette with La Partage:
- If Red hits: profit = +$10
- If Black hits: loss = −$10
- If 0 hits: loss = −$5 (half stake)
Expected loss comes only from the zero outcome being partially unfavorable:
EV ≈ (1/37 × -5) = -$0.135...
So you’re at about -$0.14 per $10 bet in the long run—matching the ~1.35% effective edge for even-money bets.
Example 3: $10 straight-up on a single number
Whether European or American, the payout is typically 35:1 (profit +$350 if you hit, lose −$10 if you miss). The wheel design is what shifts your odds.
European (37 pockets)
EV = (1/37 × 350) + (36/37 × -10) = (350 - 360)/37 = -10/37 ≈ -$0.27
American (38 pockets)
EV = (1/38 × 350) + (37/38 × -10) = (350 - 370)/38 = -20/38 ≈ -$0.53
Helpful insight: The same “about half the expected loss” relationship holds for many bet types when you move from American to European rules, because the edge is driven by the number of zero pockets.
Bet types are the same, but layouts and number sequences can differ
Roulette is refreshingly consistent: you’ll see the same core categories of bets almost everywhere.
Inside bets (on the numbered grid)
- Straight-up (single number)
- Split (two numbers)
- Street (three numbers in a row)
- Corner (four numbers)
- Six line (six numbers)
Outside bets (on broader categories)
- Red/Black
- Odd/Even
- High/Low (1–18 / 19–36)
- Dozens (1–12, 13–24, 25–36)
- Columns (12-number vertical sets)
What can change between casinos (and between online vs land-based) is:
- Table layout (American tables include a 00 position on the felt).
- Number sequence around the wheel (the order of numbers isn’t numerical, and wheel sequences can differ by design and region).
- Betting limits (minimums and maximums vary widely by venue and table).
- Rule options (especially whether French rules like La Partage or En Prison are offered).
Online vs brick-and-mortar roulette: availability and rule sets
One of the best parts of modern roulette and online blackjack is choice: you can often select a specific roulette variant rather than simply taking what’s on the casino floor.
What you’ll commonly find online
- European roulette is widely available in both software-based (RNG) and live-dealer formats.
- American roulette is also common, especially in markets where it’s the traditional default.
- French roulette may be offered as a distinct table, often highlighting La Partage or En Prison in the rules.
Online roulette can be especially player-friendly for comparison shopping because games often display key settings (like single zero vs double zero) before you join a table.
What you’ll commonly find in land-based casinos
- In many European venues, single-zero roulette is a standard option.
- In many US venues, double-zero roulette is common, though some casinos may offer single-zero tables (availability varies).
- Table minimums in brick-and-mortar casinos can be higher during peak hours or at premium tables, which makes picking a lower house edge even more valuable for your bankroll.
Why rule sets can vary more than you expect
Even within the same roulette “type,” casinos may adjust:
- Bet limits and maximum payouts
- Whether La Partage or En Prison is active (and exactly how it’s applied)
- Side bets or special features (these can have different odds than the base game)
Practical tip: If you care about odds, treat the table placard (or online rule panel) as part of the game. The best version is the one with the lowest effective edge on the bets you actually enjoy placing.
Brief history: how European and American roulette diverged
Roulette is commonly associated with France, where the modern concept of the game took shape in Europe. Over time, roulette traveled and evolved across countries and casino cultures.
As roulette became established in the United States, the double zero (00) was introduced on many wheels. That small physical change created a distinct American roulette identity—and a higher built-in advantage for the house—while keeping the familiar betting experience that players already understood.
French roulette remains closely tied to the European single-zero tradition and is especially recognized for rules like La Partage and En Prison, designed to soften the impact of zero on even-money bets.
Choosing the best roulette for you (with a player-first mindset)
Roulette can be pure entertainment, a social table game, and a satisfying way to make quick decisions with clear outcomes. If you want that fun while also getting the best value for your wagers, here are smart, positive moves that keep the experience strong.
1) Prioritize single-zero wheels when possible
If your goal is better long-run value, European roulette is typically the go-to because of the 37-pocket wheel and ~2.70% house edge.
2) If you love even-money bets, seek French rules
If you mostly play Red/Black, Odd/Even, or High/Low, choosing French roulette with La Partage or En Prison can reduce the effective edge on those bets to about 1.35%.
3) Match the table limits to your bankroll
Because betting limits vary across land-based and online casinos, the “best” roulette table is also the one where you can comfortably ride out variance. Lower minimums can mean more spins and more entertainment value at the same budget.
4) Keep expectations realistic and enjoy the clarity
Roulette outcomes are independent, and no betting system changes the underlying probabilities. The win is in choosing the most favorable rules you can—and then enjoying the ride with a budget that makes sense for you.
Frequently asked questions
Is European roulette always better than American roulette?
From a math perspective, European roulette is typically better for players because the single-zero wheel creates a lower house edge (about 2.70%) than American roulette (about 5.26%). The gameplay and bet types remain very similar.
Does French roulette pay more?
The standard payout structure (e.g., 35:1 on a straight-up number) is typically the same. The advantage of French roulette is usually in special rules like La Partage or En Prison, which can improve odds on even-money bets.
What does “En Prison” mean in French roulette?
French roulette en prison refers to a rule where an even-money bet that would lose when 0 hits is instead held for the next spin. Depending on the next outcome, you may recover your stake (often without profit) or lose it.
Bottom line: the one-number difference that doubles the edge
The simplest, most powerful takeaway in European vs American roulette is this: American roulette adds a 00 pocket, moving from 37 to 38 pockets, and that shifts the roulette house edge from about 2.70% to about 5.26%.
If you want an even stronger player-friendly option, look for French roulette with La Partage or En Prison. On even-money bets, those rules can reduce the effective house advantage to about 1.35%—a meaningful improvement that keeps the same classic roulette feel while stretching your entertainment value further.
