Why rules matter: Published estimates can span 1.35–7.89%. The relevant number depends on the exact rules, wager, pay table, and strategy—not merely the game name.
What changes the math
- Single-zero roulette has a 2.70% standard house edge.
- Double-zero American roulette rises to 5.26%.
- La partage or en prison can cut the edge on even-money bets.
A practical approach
Choose a single-zero wheel and look for player-friendly even-money rules. A house-edge figure is useful only when it describes the actual rules and wager in front of you.
What house edge really means
House edge does not predict what percentage of your bankroll you will lose in one visit. It describes the casino’s expected share of total action over a very large sample. Short-term results can sit far above or below that average.