Single zero roulette means a roulette game with one zero pocket on the wheel, usually marked 0, plus the numbers 1 through 36. In casino language, it is the cleaner roulette version for players because the extra double-zero pocket is not present, so the house edge is usually lower than American double-zero roulette.
Plain Talk
Single zero roulette is often what players mean when they say “European roulette,” although not every European-style table has every player-friendly rule attached to it. The key point is simple: one zero gives the casino less extra space on the wheel.
A roulette wheel must still pay less than true odds. A straight-up number pays 35 to 1 even though there are 37 possible pockets on a single-zero wheel. That small gap is where the house edge lives.
This glossary page defines the term. For the full game explanation, read Roulette.
| Term | Plain-English meaning | Where it appears | Why it matters |
|---|---|---|---|
| Single zero roulette | Roulette with one 0 pocket | European-style roulette tables and some live roulette games | Usually cuts the base house edge compared with double-zero roulette |
| Double-zero roulette | Roulette with 0 and 00 pockets | American roulette tables | Adds one extra losing pocket for most bets |
| La Partage | Half-loss rule on some even-money bets | Some single-zero tables | Can reduce the edge further on qualifying bets |
| En Prison | Rule that may hold even-money bets after zero | Some single-zero tables | Changes how zero affects even-money wagers |
Where You See It
You see single zero roulette on table signs, online game names, live dealer roulette streams, and rules placards. The wheel has a single 0 pocket, not 0 and 00.
In a live casino, the layout will usually show one green zero box. Online, the game title may say “European Roulette,” “Single Zero Roulette,” or “Live Roulette.” The Nevada live roulette rules of play describe a live roulette version using a physical single-zero wheel with 37 slots.
Why It Matters
Single zero roulette matters because the zero pocket is not just decoration. It is the casino’s mathematical advantage on most roulette bets.
On a double-zero table, most bets lose on both 0 and 00. On a single-zero table, most bets lose only on 0. The payouts usually stay the same, so removing the double zero improves the player side of the math.
That does not make the game beatable by betting patterns. It simply means the price of playing is usually lower.
Example
You bet $10 on red at a single-zero table. There are 18 red numbers, 18 black numbers, and one green zero. If red wins, you win $10. If black or zero wins, you lose.
The bet feels close to 50/50, but it is not exactly 50/50 because the zero exists. The zero is why an even-money roulette bet can still have a casino edge.
From the Casino Side:
From the casino side, single zero roulette is a game-positioning decision. It may attract players who understand the difference between European and American wheels, but the casino may offset that lower edge through table minimums, game speed, location, or special rules.
Management looks at more than the house edge. They also look at table utilization, average bet, hands or spins per hour, labor cost, player demand, and the table’s actual win. A single-zero game can still be very profitable if it gets enough action.
Common Misunderstanding
Players often misunderstand single zero roulette because they hear “better odds” and translate that into “I can beat it.” Better odds do not erase negative expectation. They only reduce the average cost of making the same type of bet.
Another mistake is assuming every single-zero table has La Partage or En Prison. Those are separate rules. A single-zero wheel can exist without either rule.
Hard Truth
Single zero roulette is better than double-zero roulette for the player, but it is still a house-edge game. The missing double zero lowers the leak. It does not plug the bucket.
Related Terms
| Term | Difference | Best page to read next |
|---|---|---|
| European Roulette | Common name for many single-zero games | European Roulette |
| American Roulette | Usually includes 0 and 00 | American Roulette |
| Zero | The green pocket that creates the edge | Zero |
| La Partage | A special rule for even-money bets | La Partage |
| En Prison | A rule that may hold certain bets after zero | En Prison |
| House Edge | The average casino advantage | House Edge |
FAQ
Is single zero roulette the same as European roulette?
Usually, yes in everyday casino language. The safest wording is that European roulette is normally single-zero roulette, but specific rules can vary by casino and jurisdiction.
Is single zero roulette better than American roulette?
For most players, yes. A single-zero wheel usually has a lower house edge because it has 37 pockets instead of 38.
Does single zero roulette have a system that wins?
No. A lower house edge does not create a winning betting system. The wheel result is still uncertain, and the payouts still favor the casino over time.
Does La Partage always come with single zero roulette?
No. La Partage is a separate rule. Some single-zero games have it, and some do not.
Should beginners choose single zero roulette?
If a beginner is going to play roulette, single-zero roulette is usually the cleaner choice because the base math is less expensive than double-zero roulette.
Deeper Insight
Single zero roulette is one of the clearest examples of how one small layout difference changes the price of a casino game. The spin looks the same. The bets look the same. The payouts often look the same. The difference is hidden in the number of losing outcomes.
Formula / Calculation
House Edge = Losing Extra Outcomes / Total Wheel Pockets
Single Zero Straight-Up House Edge = 1 / 37
Single Zero Straight-Up House Edge ≈ 2.70%
Expected Loss = Total Amount Wagered × House EdgeFormula Explanation in Plain English
The zero is the extra pocket that lets the casino pay 35 to 1 on a one-number bet without paying true odds. On a single-zero wheel, that extra cost is spread across 37 pockets. On a double-zero wheel, the casino has two green pockets instead of one, so the cost is higher.
Related Reading
Start with the Glossary if you are building your casino vocabulary from the ground up. For the full game structure, read Roulette. For player-facing questions, see American vs European Roulette and Why Roulette Systems Fail. For the casino-side view of game placement and floor decisions, read Casino Operations.