In the event of winning the amount is multiplied by factor 1, and paid in addition to the original amount.

All bets on Red, Black, Even, Odd, or Manque (low numbers 1-18) and Passe (high numbers 19-36) belong to the Simple Chances. Simple Chances are also known as 1:1 or 50:50 bets. If 2 Numbers are played the winning probability is: 2 * 2.7% = 5.4% in european and 2 * 2.6% in american roulette. If you want to know the percentage probability of a bet type in roulette you simply need to calculate this: Probability of 1 Number is: 1: 37 * 100 = 2.7% in european and 1: 38 * 100 = 2.6% in american roulette. In other words: the the lower the probability, the higher the payout. In roulette the payout ratio increases proportionally with decreasing probability.

A probability of 100 percent means the safe arrival of an event, and a value of 0, the safe lack of an event. The payout ratio for a bet depends on its probability. Players can continue to place bets as the ball spins around the wheel until the dealer announces 'no more bets' or 'rien ne va plus'. The roulette desk usually imposes minimum and maximum bets. In addition to the payouts, you get back your original bet amount.

Roulette zero and double zero