Roulette Probabilities



Here, we'll explain the numbers and likelihood of landing on a given number, or a cluster of numbers. Unlike other games, it is very simple to calculate the probabilities in Roulette.

It's important to understand the odds you face when making any decision when gambling so study this table and commit it to memory if you want to become a smarter and more accomplished Roulette player.

The American Roulette wheel has 36 regular numbers, a zero, and a double-zero. Hence, you have 38 possible spaces on which the ball may land. So when you are betting on a single number, you have a 1/38 chance of winning.

Over time, you will win 1 out of every 38 spins. Have a look at the probabilities for every possible outcome illustrated in the table below.

Payouts and Probabilities in Roulette

Bets Payout Odds Probability
Red 1 to 1 46.37%
Black 1 to 1 46.37%
Even 1 to 1 46.37%
Odd 1 to 1 46.37%
1 to 18 1 to 1 46.37%
19 to 36 1 to 1 46.37%
1 to 12 2 to 1 31.58%
13 to 24 2 to 1 31.58%
25 to 36 2 to 1 31.58%
Any one number 35 to 1 2.63%
Two number combo 17 to 1 5.26%
Three number combo 11 to 1 7.89%
Four number combo 8 to 1 10.53%
Six number combo 5 to 1 15.79%
0, 00, 1, 2, 3 combo 6 to 1 13.16%

Roulette Probabilities - Final Thoughts

As you can see the payout for a single number is only 35 to 1. As I stated before, you will need to spin the wheel 38 times in the long run to be ensured a win. This is where the house gets its edge. 2/38 spins will go to the casino, which converts to a 5.26% house edge.

Keep in mind these are the odds for the American Roulette table. The European table does not have the double-zero, so it is much more advantageous to the player.

When given the choice, you should always opt for the European table.

Check out some more tips like this in our Roulette Strategy section.