The lower right cell shows a house edge of 10.65%. I do not know what is the most common win, but the following return table shows the odds for a win of 150 to 1. There is also a version of 2G'$ for triple-zero roulette. Divide that by the one-unit original bet and you have a house edge of 5.33% by parlaying, relative to the initial bet. When it comes to real casinos, you’ll only find this table in the USA, Canada and high end casinos in places like London.

Again, the extra green pocket in the American version of the game reduces the odds of winning by about 0.07. In Double Zero Roulette, the odds are 1/38, or around 2.63. If the player parlays, his expected loss between the two bets is the sum of 1/37 = 0.0270 units from the first bet and an average of (1/37)*36*(1/37) = 0.0263 from the possible second bet for a total of 0.0533 units. The American version of the game features an extra slot but the payouts remain the same, pushing the house edge up to 5.26 from the 2.7 you get with the European game. In Single Zero Roulette, the odds of winning a straight-up bet are 1/37, or approximately 2.70. The answer has to do with the way the house edge is defined. The astute reader may wonder why the player should accept a win of 1,300, at a house edge of 4.97%, rather than parlay, when the house edge in single-zero roulette is 2.70%. Thus, I would do that rather than accept a win of 1,275 or less. By parlaying a first win on zero himself, the player can achieve a win for two consecutive zeros of 1,296 to 1.

Fobt roulette double zero