Support UkraineSupport Ukraine

A Guide to Roulette Odds

The mathematical foundation of the game of roulette primarily involves the various probabilities of a particular bet turning out to be a winning one. By choosing the correct option, a player can significantly increase their chances of winning. However, with such a variety of betting options, one should calculate the likelihood of success and realistically assess the odds of winning. This is why experienced players know by heart the odds for each type of bet, which helps them accurately calculate their game strategy and navigate through bets. Therefore, before sitting down at the table, it's important to understand the intricacies of the game in order to know how great the chances are of winning in a particular variant of classic roulette. So, let’s deeply explain what are the odds on roulette.

Methods of calculating Odds of success

The system of calculations is not as complex as it may seem at first glance, and with the desire, all necessary calculations can be performed mentally without using a calculator. To determine the best odds in roulette of winning in the game, one should divide the numbers covered by the bet by the total number of pockets on the wheel, and then multiply the result by 100. The obtained value will represent the percentage chance that the placed bets will turn out to be winners. For example, in the case of the European classic roulette, which has 37 numbers ranging from 0 to 36, the calculation is approximately as follows:

  • For a straight bet, where a player places a bet on a single number, the initial value will be 1/37.
  • Dividing these numbers results in 0.027.
  • To get the percentage chance, this value should be multiplied by 100, i.e., 0.027 × 100 = 2.7%.

The calculations are somewhat different for a red/black bet, as this type of bet covers only 18 numbers. In this case, the equation looks like this: 18/37 × 100 = 48.64%.

It's important to note that this rule applies to the French and European versions of roulette, which have a single zero. In the American version, there is an additional double zero (00), resulting in 38 pockets on the roulette wheel. Therefore, the calculation formulas will be slightly different there.

Odds = Number of occupied field Number of overall fields x 100%

Number of overall fields = 36 for single zero roulette

Number of overall fields = 37 for single double zero

Roulette Betting Odds

This table provides specific winning probability figures for each type of bet. With its help, every novice can navigate the selection of suitable bets and learn to calculate these values on their own right at the table. This information applies to the classic game and will assist in not only calculating the best roulette odds but also managing one's budget.

Bet Odds (single zero version) Odds (double zero version) How to calculate (single zero) How to calculate (double zero)
Straight up 2,70% 2,60% 1/37*100 1/38*100
Split 5,40% 5,30% 2/37*100 2/38*100
Street 8,10% 7,90% 3/37*100 3/38*100
Corner 10,80% 10,50% 4/37*100 4/38*100
Basket - 13.20% - -
Six Line 16,20% 15,80% 6/37*100 6/38*100
Column 32,40% 31,60% 12/37*100 12/38*100
Dozen 32,40% 31,60% 12/37*100 12/38*100
Even/Odd 48,60% 47,40% 18/37*100 18/38*100
Red/Black 48,60% 47,40% 18/37*100 18/38*100
High/Low 48,60% 47,40% 18/37*100 18/38*100

Announced Bet Odds

Furthermore, you will find a table of odds designed for the European variant of roulette, which includes additional types of bets. These include the announced bets Voisins du Zero, Orphelins, Tiers du Cilindre, and Jeu 0 Bets. Calculating these bets is complicated as they cover multiple numbers simultaneously, with some encompassing one-third of the wheel, hence their coefficients will be different.

Bet Odds How to calculate
Visions du zero 45.95% 17/37*100
Orphelins 21.62% 8/37*100
Tiers du cylindre 32.43% 12/37*100
Jeu 0 18.70% 7/37*100
Neighbours 13.8% 5/37*100

Learn about probabilities, then play online roulette

Gembet Casino
Accepts ML players
Bonus 150% up to MYR750
Wagering requirement x18
Roulette games 30+
Live dealer true
  • skrill
  • mastercard
  • visa
  • bitcoin

Roulette Odds Calculator

Below is a convenient calculator developed by our experts at Roulette77, which will help calculate a player's Odds of winning for free. The entire calculation process is automatic and displays a player's chances of success based on the type and size of the bet. There's no need to use the calculation formula provided above. This method will yield a more accurate and quicker result for the chances of success in the game.


What are roulette betting odds?

Roulette betting odds represent the mathematical probabilities of different types of bets winning in the game. They help players understand their chances of winning based on the bets they place.

How can I use the odds table for roulette?

The odds table provides specific winning probabilities for various types of bets. Novice players can refer to this table to choose suitable bets and learn how to calculate their own odds while playing.

What are announced bets in European roulette?

Announced bets, such as Voisins du Zero, Orphelins, Tiers du Cilindre, and Jeu 0 Bets, are special bet types in European roulette that cover multiple numbers simultaneously. Due to their complex nature, calculating their odds involves considering specific patterns on the roulette wheel.

How does the roulette odds calculator work?

The roulette chances calculator provided by Roulette77 is a tool that automatically calculates a player's chances of winning based on the type and size of the bet. It offers a quick and accurate estimation of the player's likelihood of success without the need for manual calculations.

Why is understanding odds important in roulette?

Understanding roulette chances is crucial for making informed betting decisions and managing your budget effectively. By knowing the probabilities of different bets, players can tailor their strategies to increase their chances of winning while enjoying the game responsibly.

Any questions? Ask our Roulette Wizard!
Ask question