Roulette Probabilities by Online-Casinos.com

On this page of Online-Casinos.com you have the chance to learn about the odds and probabilities of the American roulette wheel.

Roulette Probabilities

Calculating the probabilities of a certain outcome at the roulette table is very easy. For example, the American roulette table has 36 regular numbers, a zero and a double zero, adding up to 38 numbers. So, if you are betting on a single number you have a 1/38 chance of winning. In the long run you will win one game for every 38 spins. Remember that this is the long run return - in the short term perhaps you will win several spins, perhaps you will not win a single spin.

The casino has the edge in this game. One win will get you odds 35-1 or 35 units if you bet one. But you will have to play 38 spins/units to win 35 units. That means the house edge on a single number bet on the American wheel with 38 different numbers is 2/38 - or 5.26%.

Here are the probabilities of every possible roulette outcome - you can use them when you place your bets on the roulette table.

Probabilities of the American Roulette Wheel
Roulette Bets Odds/ Pays Roulette Probability
Red Number 1-1 46.37%
Black Number 1-1 46.37%
Even Number 1-1 46.37%
Odd Number 1-1 46.37%
1 to 18 1-1 46.37%
19 to 36 1-1 46.37%
1 to 12 2-1 31.58%
13 to 24 2-1 31.58%
25 to 36 2-1 31.58%
Any one number 35-1 2.63%
Two number combination 17-1 5.26%
Three number combination 11-1 7.89%
Four number combination 8-1 10.53%
Six number combination 5-1 15.79%
0, 00, 1, 2, 3 combination 6-1 13.16%
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