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American vs European Roulette: The House Edge Math That Should End the Debate
American roulette's double-zero wheel carries a 5.26% house edge — nearly double the 2.70% of European single-zero. French roulette with la partage drops it to 1.35%. The arithmetic is settled; the only question is which wheel is in front of you.
The single zero on a European roulette wheel versus the double zero on an American wheel does not look like much. It is one extra pocket on a wheel that already has 37. But that one pocket is the entire difference between a house edge of 2.70% and 5.26% — and on a fixed-odds game where you cannot change the math with skill, that gap compounds into a meaningful difference over any real session.
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The Arithmetic, Laid Out Plainly
Roulette payouts were set before the American double-zero wheel existed, and they were never updated to reflect it. A straight-up bet on any single number pays 35:1 on both wheel types. That is the fixed fact the casino does not advertise.
European (single zero): 37 pockets. Fair odds for a 1-in-37 bet: 36:1. Payout: 35:1. The shortfall — the casino’s margin — is 1 unit on a 37-unit bet:
1 ÷ 37 = 2.70%
American (double zero): 38 pockets. Fair odds for a 1-in-38 bet: 37:1. Payout still 35:1. The shortfall is now 2 units on a 38-unit bet:
2 ÷ 38 = 5.26%
This is not a rounding difference or a promotional quirk. The casino kept the payout the same and added a second zero pocket. The payout formula applies to every bet category — inside bets, outside bets, column bets, dozen bets — because every one of them was priced assuming the zero(s) would occasionally win without paying out proportionately.
Comparison Table
| Wheel type | Zeros | Total pockets | House edge (all bets) | Exception |
|---|---|---|---|---|
| European | 1 (0) | 37 | 2.70% | — |
| American | 2 (0, 00) | 38 | 5.26% | Five-number bet: 7.89% |
| French (la partage) | 1 (0) | 37 | 2.70% inside; 1.35% even-money | Only even-money bets |
The five-number bet on American roulette — a single bet covering 0, 00, 1, 2, and 3 — deserves its own mention because it is uniquely worse than everything else on the table. It pays 6:1 on a 5-in-38 probability, producing a house edge of 7.89%. There is no strategic reason to place it.
French Roulette: The Third Option Worth Knowing
French roulette uses a single-zero wheel (same as European) but adds a rule called la partage. When the ball lands on zero, all even-money bets — red/black, odd/even, 1–18/19–36 — receive half their stake back. The logic: the zero pocket is the mechanism by which the casino collects its margin. Returning half of that loss on the applicable bets halves the effective edge:
2.70% × 0.5 = 1.35%
This applies only to even-money bets. Inside bets on a French wheel still carry 2.70%. If you are playing even-money bets and the table offers la partage, the effective house edge is lower than anything available in standard blackjack at most online casinos.
En prison is a variant: instead of returning half the stake, the even-money bet is “imprisoned” and replayed on the next spin. If it wins, the full original stake is returned (with no profit); if it loses, the casino takes it. Over many spins, en prison and la partage converge to the same 1.35% edge.
Why You Should Decline American Roulette If European Is Available
The case is simply arithmetic. Both games look and play identically from a session experience standpoint. The wheel spins, the ball lands, bets are paid or cleared. The only structural difference is a single extra pocket that costs you an additional 2.56 percentage points on every bet, every spin, indefinitely.
Over 200 spins at $10 per spin:
- European: Expected loss ≈ $54
- American: Expected loss ≈ $105
That is not a lifestyle framing or a risk-management lecture; it is the arithmetic output of the respective house edges at realistic session volume. The reason American roulette persists in brick-and-mortar casinos is partly historical (the double zero was added in the US to increase operator margins) and partly because many players do not know the difference. Online crypto casinos almost universally offer European roulette as the default, which is one concrete advantage of the format.
Where to Play European Roulette at Crypto Casinos
Most licensed crypto casinos carry both wheel types, but the default lobby table is often the variant with the lower edge — which benefits you. The casinos on our roster that offer a strong live roulette selection include Stake, BitStarz, and Cloudbet. Before sitting down at any table, confirm which variant the table footer shows. A single-zero wheel is unambiguous: if the wheel shows only one green pocket, you are playing European rules.
For a broader view of how house edge interacts with game selection, see our house edge guide and full roulette guide.
The Honest Caveat
None of this analysis changes the fact that roulette — any variant — is a negative-expectation game. The lower house edge on European roulette means you lose money more slowly than on an American wheel, not that you gain an edge over the house. La partage at 1.35% is genuinely low for a casino game, but it is still 1.35%. Bankroll management, session limits, and playing only where it is legal in your jurisdiction remain the relevant practical concerns.
Gambling involves real financial risk. Only play with money you can afford to lose. Age restrictions apply (18+ in most jurisdictions). Verify that online casino access is legal where you reside before depositing.
Bottom Line
Choose European over American roulette whenever you have the option — the math is unambiguous. If French roulette with la partage is available and you intend to play even-money bets, take it: 1.35% is the lowest house edge you will find at a roulette table. Neither variant gives you an edge over the casino, but the choice of wheel is one of the few decisions at a roulette table that actually affects your expected outcome.
FAQ
- Why does the 00 pocket make such a large difference to the house edge?
- A standard American roulette wheel has 38 pockets (1–36, 0, 00). A straight-up bet on any single number pays 35:1 regardless of the wheel type. On a European wheel (37 pockets) the fair payout for 1-in-37 odds would be 36:1, so paying 35:1 costs the player 1/37 ≈ 2.70%. On an American wheel (38 pockets) the fair payout would be 37:1, but the casino still pays only 35:1, costing 2/38 ≈ 5.26%. The payout does not change; the wheel does, and that extra pocket doubles the cost.
- What is la partage and how does it affect the house edge?
- La partage is a French roulette rule that returns half of any even-money bet (red/black, odd/even, high/low) when the ball lands on zero. Since the zero outcome is the sole source of the house edge on even-money bets, halving the loss on that outcome halves the edge: from 2.70% down to 1.35%. En prison is a variant of the same idea — the bet is held for one more spin rather than returned — and the long-run math works out identically.
- Are there any bets on an American roulette wheel worth placing?
- The five-number bet (0, 00, 1, 2, 3) has a house edge of 7.89%, making it the worst bet on the table by a wide margin. All other bets on an American wheel carry the same 5.26% edge. If you are in a venue that only offers American roulette, column bets and even-money bets are no worse than any other option — but none of them are good in absolute terms. The correct answer is to find a European or French wheel.