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Practice game for entertainment and education only. No real money is wagered or won. Results do not reflect real gambling outcomes. Gambling involves risk of loss.
European roulette (single zero) has a 2.70% house edge. American roulette (double zero) doubles that to 5.26%. Always play European if you have the option — the difference costs you real money over time.
Place chips on the numbers, colors, or groups you want to bet on. The dealer spins the wheel and drops the ball. If it lands on your selection, you win. Inside bets (specific numbers) pay more but hit less often; outside bets (red/black, odd/even) pay even money.
No betting system (Martingale, Fibonacci, Labouchere) can overcome the mathematical house edge. Every spin is independent. Systems only change your variance profile — they cannot turn a negative-expectation game into a positive one.
European has 37 pockets (0-36) while American has 38 (adding 00). That extra pocket nearly doubles the house edge from 2.70% to 5.26%. There is never a mathematical reason to play American roulette.
BonusBell's free roulette simulator is provably fair and lets you practice both European and American variants. Strategy hints highlight house edge differences and track your session results. No account required.