American, or 38-number, roulette wheel has an additional green pocket, a double zero. This simple feature doubles the house edge in the American roulette in comparison to its single-zero, European cousin. Another significant difference is that chips in American roulette have no value denomination printed on them. To indicate the value of chips the dealer places a token on each colour chip from dealer’s stack.
The house edge in the American roulette is 5.26% (or 1/19) an all bets with exception of the 0-00-1-2-3 combination, which carries a house edge of 7.89%.
