Calculate the odds, payouts and expected value for every type of roulette bet.
European roulette has 37 pockets (0–36) giving a house edge of 2.70%. American roulette adds a 00 pocket (38 total), nearly doubling the edge to 5.26%. Always choose European when available.
French roulette with La Partage returns half your stake on even-money bets when the ball lands on 0, cutting the house edge to just 1.35% — the best roulette variant available.
Martingale, Fibonacci, D'Alembert — no betting system changes the house edge. They redistribute risk but not expected value. Every spin is independent of the last.