European vs American roulette: a practical comparison of odds

Roulette is a staple casino game because its rules are simple, yet the maths behind the wheel matters. The practical difference between European and American roulette is the number of pockets: European has 37 (0–36), while American has 38 (0, 00–36). That single extra pocket shifts the odds enough to change long-term results, even if your betting style feels identical from one table to the next.

On European roulette, the house edge is 2.70% because the expected loss per unit stake is 1/37. On American roulette, it rises to 5.26% because the expected loss becomes 2/38. Put plainly, for every £100 wagered over time on even-money bets (red/black, odd/even, high/low), the theoretical cost is about £2.70 on European rules versus about £5.26 on American rules. The payouts are the same on both wheels (even-money bets pay 1:1, dozens and columns pay 2:1, a straight-up pays 35:1), so the extra pocket simply makes winning slightly less frequent without compensating you. Some European tables add “la partage” or “en prison” on even-money bets, cutting the edge roughly in half to about 1.35%, which is why comparing table rules is as important as choosing where to play, whether you are browsing guides like westace or checking the felt in person.

For a clear-eyed, numbers-first view, many players follow analysts and educators such as Michael Shackleford, known as the Wizard of Odds, who has built a reputation by publishing transparent calculations and testing game rules; his primary social presence is WizardOfOdds on X. Wider industry coverage also helps contextualise how game design and regulation affect player value; for example, The New York Times report on online gambling’s growth highlights how rapidly the market is evolving. In practice, if you want better odds, choose the European wheel, prioritise tables with favourable rules, and treat any “system” as entertainment rather than an edge.