Why American Roulette Has a Higher House Edge Than European
The difference between European and American roulette comes down to a single extra pocket on the wheel – but that one pocket nearly doubles the house edge. Here’s the actual math behind why, worked through step by step rather than just stated as a fact.
The One Structural Difference
European roulette has 37 pockets: numbers 1-36 plus a single zero. American roulette has 38: numbers 1-36 plus both a single zero and a double zero. Payouts on standard bets are identical between the two – a Straight-Up bet pays 35:1 either way. What changes is how often that bet actually wins.
Working Out the House Edge
With 37 numbers and a payout structure built around a 36-number wheel, the house’s mathematical advantage works out to 1 pocket out of 37, or 1/37 ≈ 2.7%.
With 38 numbers and the same underlying payout structure, the house’s advantage comes from 2 pockets out of 38, or 2/38 ≈ 5.26%.
The payout never changes – only the number of ways to lose does. That’s the entire mechanism: American roulette adds a losing pocket without adjusting any payout to compensate, which is exactly how the edge nearly doubles.
What This Actually Costs Over Time
House edge describes long-run expected loss, not what happens in any single session – but the difference compounds meaningfully over volume. Across 100 bets of $10 each, a 2.7% edge implies an expected loss of about $27, while a 5.26% edge implies about $52.60. That’s not a guarantee for any specific session, but it’s the direction the math consistently pulls over enough spins.
The Worst Bet on Either Wheel
American roulette’s Five-Number Bet (0, 00, 1, 2, 3) pays 6:1 but carries a 7.89% house edge – meaningfully worse than any other standard bet on either wheel. It exists only on American tables, since it requires both zeros to be adjacent.
Why American Roulette Still Exists
If European roulette is mathematically better for players, the double-zero wheel persists mainly because it’s historically embedded in North American casinos and because many casual players simply never check which version they’re playing. Since payouts look identical between the two, the difference is easy to miss unless you’re specifically counting pockets.
Which Wheel to Actually Play
Where you have a genuine choice – which online platforms almost always offer – European or French roulette is the better mathematical option every time. American roulette isn’t a scam or unfair in any sense; it’s simply a worse-odds version of the same game, and now you know exactly which pocket is responsible for the difference.
