There are two main categories of bets in Roulette: Inside and Outside.

Outside bets may be even money bets, black/red, even/odd, or high/low, or may be two to one bets. The two to one bets are the Dozens bets and Columns bets. The dozens bet is where the bet is placed on either numbers 1-12, 13-24, or 25-36. The final group of outside bets are the columns bets. The box at the bottom of each of the three columns is where the bet is placed. It is marked "2 to 1". Look at the diagram below.

Column Bets: Place wager in box below column. Pays 2 to 1. Even Money wagers are the outermost 6 boxes. The three dozens boxes are closest to the numbers and pay 2 to 1. The second major category of bets are the six Inside Bets. They are made on the field or on lines and intersections of lines adjacent to the field of numbers.

1. Straight-up Bet: Straight-up bets are bets on one number only. The payoff is 35:1, and the odds of hitting a single random number is 38 to 1 on the American wheel. The house advantage is 5.26% on the American wheel.

2. Split Bet: Split bets are placed on a line between two numbers. The bet is "split" between the two, so if either wins, the wager is paid. It is paid at 17 to 1, and the odds of either of them hitting is 19 to 1. The house advantage is also 5.26% on the American wheel.

3. Street Bet: Street bets are placed on the outside border on the line of 3 numbers. One bet can cover three numbers such as 1-2-3, 34-35-36, etc. The wager is paid at 11 to 1, and the odds of either of the three numbers hitting 38 to 3. The house advantage remains at 5.26%.

4. Corner Bet: A corner bet covers four numbers. The wager is placed at the junction of four number corners, hence the name. Since it covers four numbers, the payoff is 8 to 1. The odds of one of the numbers hitting is 19 to 2, and the house advantage remains at 5.26%.

5. Five Number Bet: The five number bet is unique to the American wheel and table. This bet is placed where on the outside left where the one and zero intersect. It covers numbers 1, 2, 3, 0, and 00. It pays at 6 to 1, and the odds of one of the five hitting is 38 to 5. This is the worst bet on the table,with a casino take of 7.9%, and is not recommended. Since the French wheel has only a single zero, This bet is actually a four number bet on 0, 1, 2, and 3.

6. Line Bet, also known as Double Street Bet: This bet covers two streets and is placed on the outside line between two rows of three numbers each. It covers the six numbers of the two "streets" or rows, an pays at 5 to 1. The odds of one of the six numbers winning is 19 to 3, and the casino take is 5.26%.

The diagram below shows the inside bets.