Understanding the Roulette Odds

James Smith
July 1, 2020
Modified: January 30, 2024

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The game of roulette is a game of chance which is determined by the outcome of bets. Acknowledging this fact helps players learn different ways of optimising their play and avoiding any losses on the table. The best tactic to use to boost your chances of winning is to understand the roulette odds. Navigating the roulette guide laid out for every roulette game helps us understand the basic steps to follow while playing.

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In every casino game, each player plays against the house, and with roulette, we have the player and the house dealer, who controls the game. When playing on the table, each participant is given chips of different colours and everyone is allowed to make bets above the minimum limit set by the casino.

Next, the dealer spins the wheel and the ball and the winning bet is determined by the slot position the ball lands on. If you are playing French roulette, the odds of winning may be determined by the number of slots on the table and the house edge advantage. This type of roulette has 37 pockets and this means that the odds of winning are 1:36, with 36 being the number of ways you can lose.

The roulette odds also depend on the type of bet; for instance, if you made a straight bet on a single number, the odds of winning on that particular bet on European roulette is 2.70%. Therefore, understanding these odds will help you make the best bet amounts on the table. Keep reading this Betiton guide for more information about this exciting game!

What you need to know about roulette odds

Odds are a good method of determining the likelihood of a certain desired outcome happening. With roulette games, odds are measured in comparison to the number of slots available on the table; for example, American roulette has 38 slots and therefore the odds of winning or losing are 1:37, with 37 being the total number of ways you could lose.

Before starting a game, all players need to understand the roulette rules. Each player is given coloured chips, which they use to mark on their bets. Then the play begins, where each player places their bet, then the dealer spins the wheel and the ball. The pocket number where the ball settles is considered the winning number.

If your bet matches this number, then you win and the dealer pays you, depending on the number of bets you had made. Once you understand the rules of roulette, you now need to decide on the best roulette strategy to use. One of the most common strategies that new players use during the game is betting on the outside bets. These bets are proven to have high odds of winning, despite their low payout.

However, to beat the odds of losing, there are more aggressive strategies used while playing roulette; for example in the Adrucci strategy, players note that there are some numbers that appear more often than others during a couple of spins. This therefore requires the player to observe the game carefully and recognize these numbers – and place a bet on them, since the probability of winning on those numbers is high.

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How to calculate odds

Odds are dependent on the version of roulette you are playing and the type of bet you place on the table. While learning how to play roulette, basic knowledge of odds is very important in order for you to boost your possibilities of winning. You can place your bet on inside or outside bets; the outside bets are statistically proven to offer higher chances of winning, but with low payouts compared to inside bets.

One simple calculation for odds is this: odds for winning = probability of winning/(1-probability of winning). If we placed our bet on colour red on European roulette, the probability of winning would be 18/35, since the odds ratio of this roulette version is 1:35.

This ratio determines the amount of money given to a player after a win. Under normal circumstances, the casino should be paying out money on a ratio of 1:36, with respect to the 36 number of slots on the wheel, but they sometimes change the rules to their advantage. They pay the players money on a 1:35 scale and the 1% ratio difference from the game is given back to the casino as profit.

If a player had placed a bet of $1 and won, they would get to keep their $1 and win the extra $35. Every specific bet in roulette has a different odd outcome; for example in a split bet where you are supposed to choose neighbouring numbers as your bets, the odds of winning on French roulette is 5.41%.

Odds by bet type

All roulettes found in casinos today operate under roulette bets and rules put in place. In roulette, we have two main types of bets: inside and outside bets. Each bet has smaller sub-divisions of bets with different odd variations. The roulette guide gives helpful tips on the best bets to place while keeping in mind the winning projections.

The outside bets include even bets, odds, columns, dozens, low 18, high 18, red and black. These bets offer higher possibilities of winning, with most of them giving an odd chance close to 50%. The even-money bets give a 48.65% winning chance on European roulette, with a higher payout of 1:1.

The column and dozen bets offer a 32.43% winning odd on French roulette with a 2:1 payout amount. On the other hand, the inside bets include straight, split, street, basket, double street, and corner bets. Straight bets are where you place a bet on a single number. These bets have low possibilities of winning, but high payouts of 35:1. The chances of winning with this bet are at 2.63% on American roulette.

The street bet is where a player places a bet on a row of numbers, such as 7,8,9. The possibilities of winning are at 8.11% on European roulette and 7.89% in the American version. Regardless of the type of bet you place, you need to know how these odds affect the money you bet on the game. In addition to knowing the odds, keep in mind that the house edge will always have an advantage, since the odds on roulette are based on luck.

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How to know your odds

Odds vary depending on the version of roulette you are playing. American roulette uses a wheel with 38 pockets, which include numbers 1-36, a single zero (0) and a double zero (00) slot. The numbers are outlined from outside inwards. This double zero slot distinguishes it from standard roulette, which has 36 pockets. The main disadvantage of having the double zero pocket is that it increases the house advantage over the players to about 5%.

This means the chances of players winning in this game are very slim, while the casino stands a chance of gaining profits on every loss you encounter. However, odds on certain bets may boost a player’s chances of winning. If you use the straight-up bet, your chances of winning are 35:1; the split has a 17:1 payout; the street bet has a payout of 11:1; while the corner bet has a payout possibility of 8:1.

The outside bets offer greater winning chances, with a payout of 2:1. In order to understand the odds you are facing, you need to know how much you can lose on a bet and how long your money can last while playing the game. In order to be a pro at this game and beat the odds of losing, you need to put lots of practice into the game.

The best way to do this is through a free online roulette simulator. This online game is free, with no registration required. It will give you the opportunity of trying new strategies and understanding how the place bets to your advantage. Alternatively, you could try one of our free roulette games at

  • Step 1: Know the version of roulette you are playing
  • Step 2: Understand the house edge percentage in the game
  • Step 3: Determine the best bets to place on the game

European roulette uses a wheel with 37 pockets, consisting of numbers 1-36 and a single zero (0) pocket. This roulette version is advantageous to the player, since it has a lower house edge in comparison to American roulette. Most players prefer this type of roulette because of the single (0), since it gives a smaller chance of losing and a higher chance of gaining back the bet money even if the ball settles on the zero slot.

Like any casino game, this version of roulette also relies on odds to determine the possible outcome of the game. The different types of bets offer different payouts depending on the odds. The outside bets offer high odds of winning a bet, but low payouts.

For instance, the dozen bet is placed on all group numbers in the first (1-12), second (13-24) or third (25-36), with the chip placed on any dozen groups. The payout is 2:1. The black and red, even, odd, high and low bets all have an even money payout. The inside bets in this roulette game offer low chances of winning, but with a higher payout.

The bet with the highest payout is a straight bet, which has a 35:1 payout. To enhance your skills in playing the game, the free roulette is an easy online game with no prior registration required. The platform gives you the chance of trying new strategies and bets without the risk of losing your money. It will give you tips on the best ways of playing in order to increase your chances of winning.

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The payout odds vary depending on the type of bet placed on a game.

The odds of of hitting 0 in roulette is low.

Yes, there is some strategies for Roulette. You can learn more about it in our Guide.

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James Smith

At the age of 28, James, an expert in technology and video gaming with a passion for online casinos, pursued studies in Creative Writing and Media Studies at the University of London. As an active contributor to the Gizmodo Twitter account, his goal is to share his knowledge of video game culture and technological advancements with you, the readers.