European vs American roulette: the zero that doubles the price
Table games
A European wheel keeps 2.70% of every stake on average, an American wheel 5.26%: on 1,000 staked, about 27.03 against 52.63.
- 2.70%European wheel
- 5.26%American wheel
- 1.95times the price
The Role of Extra Pockets
The difference in cost stems from the number of pockets on the wheel. A European wheel has fewer pockets than an American wheel, which adds a double-zero slot. This extra pocket changes the odds for every bet type. The payout ratios remain fixed, but the probability of winning shifts slightly downward. As the key figures show, this small change nearly doubles the average cost per stake. The table lists the pocket counts and corresponding edges for quick reference.
| Wheel | Pockets | House edge |
|---|---|---|
| European | 37 | 2.7% |
| American | 38 | 5.3% |
Understanding the Average Loss
The house edge represents an average over many bets. Short sessions can vary widely due to random swings. Over time, however, results converge toward the expected value. For the total staked amount shown in the lead, the European wheel returns a smaller portion to the player than the American wheel. The ratio between these losses is close to two. This means the American wheel costs nearly twice as much in the long run. The difference is not a bonus or a fee, but a mathematical consequence of the extra pocket.
Comparing Specific Bets
Every bet type suffers from the additional pocket. Straight bets, splits, streets, corners, and outside bets all face the same structural disadvantage. The payout odds do not adjust to compensate for the extra slot. This creates a consistent gap between the true odds and the paid odds. The gap is larger on the American wheel because the denominator of the probability calculation increases. The result is a higher expected loss for every dollar wagered. The table helps visualize this consistent difference across wheel types.
Long-Term Implications
Players should recognize that the house edge is a fixed mathematical reality. It does not depend on skill, timing, or specific betting patterns. The American wheel’s extra pocket ensures a higher retention rate for the operator. This effect compounds over many spins. While short-term results may look favorable, the average loss aligns with the stated percentages. Choosing a wheel with fewer pockets reduces this average cost. The difference is measurable and consistent across all standard bets. See the house edge details for broader context. Readers seeking further support may consult help and support.
Questions
Why does the American wheel cost more?
The American wheel has an extra double-zero pocket. This increases the total number of pockets without increasing the payout odds. The result is a higher house edge on every bet.
Does the house edge change for different bets?
No. The percentage remains constant for all standard bets on a specific wheel type. The edge is determined by the ratio of winning pockets to total pockets, which is fixed for each wheel.
Is the edge guaranteed in every session?
The edge is an average over many bets. Short sessions can vary significantly due to randomness. Long-term results will converge toward the expected percentage shown in the key figures.
Where can I find more calculation details?
Visit the expected loss calculator to see how stake amounts affect returns. The methodology page explains how these averages are derived from probability theory.
Every figure on this page is computed by code from exact fractions, a complete enumeration of every baccarat deal and a recursive blackjack model, each checked a second way. See the methodology.