In-Depth Guide to European Roulette Odds

European Roulette is widely preferred due to its single zero wheel, which lowers the house edge compared to American Roulette. This guide delves deeply into the probabilities, payouts, and various strategies for maximizing your experience with European Roulette.

European Roulette Field

Types of Bets and Their Probabilities

Bet Types

1. Straight-Up Bet (Single Number)

Probability: 1/37 (2.70%)

Payout: 35:1

Explanation: Betting on a single number. This bet offers the highest payout but also has the lowest probability of winning. To calculate the probability, consider there is only one winning number out of 37.

2. Split Bet (Two Adjacent Numbers)

Probability: 2/37 (5.41%)

Payout: 17:1

Explanation: Covers two numbers that are next to each other on the betting grid. The probability doubles that of a straight-up bet as it includes two potential winning outcomes.

3. Street Bet (Three Numbers in a Row)

Probability: 3/37 (8.11%)

Payout: 11:1

Explanation: This bet covers three consecutive numbers in a horizontal line. The probability increases to account for the three potential winning numbers.

4. Corner Bet (Four Numbers)

Probability: 4/37 (10.81%)

Payout: 8:1

Explanation: Covers four numbers in a square formation on the table layout. This bet has a higher probability than the street bet as it includes more numbers.

5. Line Bet (Six Numbers)

Probability: 6/37 (16.22%)

Payout: 5:1

Explanation: Covers six numbers across two adjacent rows. The probability is nearly one in six spins.

6. Dozen Bet (12 Numbers)

Probability: 12/37 (32.43%)

Payout: 2:1

Explanation: Bets on the first, second, or third dozen numbers. With twelve numbers covered, the probability of winning is just under one-third.

7. Column Bet (12 Numbers)

Probability: 12/37 (32.43%)

Payout: 2:1

Explanation: Similar to the dozen bet, this covers one of three vertical columns of twelve numbers each.

8. Even-Money Bets (Red/Black, Odd/Even, 1-18/19-36)

Probability: 18/37 (48.65%)

Payout: 1:1

Explanation: These bets cover half of the numbers on the wheel, excluding zero. The probability is slightly less than 50% due to the presence of the single zero.

House Edge and Expected Return

  • House Edge: 2.70%
    • Calculation: The house edge is derived from the single zero on the wheel, which gives the house an advantage. With 37 slots, the edge is calculated as ( \frac{1}{37} = 2.70\% ).
  • Expected Return: 97.30%
    • Explanation: For every $100 wagered, the theoretical return is $97.30, reflecting the house edge. This expected return helps players understand their potential long-term losses.

Advanced Probability Calculations

Probability of Winning at Least Once in Multiple Spins

To calculate the chance of winning at least once in 10 spins for a straight-up bet:

The probability of losing a single spin is 36/37 = 97.29%

Thus, losing all 10 spins is 75.26%

Therefore, the probability of winning at least once is 24.74%

2000 random runs

Detailed Probability Tables

Bet TypeProbabilityPayoutExplanation
Single Number2.70%35:1Covers one specific number
Split5.41%17:1Covers two adjacent numbers
Street8.11%11:1Covers three numbers in a row
Corner10.81%8:1Covers four numbers in a square
Line16.22%5:1Covers six numbers across two rows
Dozen32.43%2:1Covers a set of twelve numbers
Column32.43%2:1Covers one of three columns
Even-Money48.65%1:1Covers half the numbers (excluding zero)

Long-Term Probabilities

Understanding long-term probabilities can help in managing expectations and bankroll. Here are some scenarios:

Single Number Multiple Hits

The probability of hitting the same number twice consecutively is:

Even-Money Bets Consecutive Wins

Winning twice in a row:

Winning three times in a row:

These calculations can extend to any number of spins to evaluate the likelihood of repeated outcomes.

Practice for Free Before Depositing Real Money

Before diving into real-money roulette, it’s highly advisable to practice online roulette free before playing for real money at RouletteUK. This approach provides several benefits:

  1. Understanding the Game Mechanics: By practicing for free, you can familiarize yourself with the rules and flow of the game without any financial risk. You can learn how different bets work and how to place them effectively.
  2. Testing Strategies: Free practice sessions allow you to experiment with various betting strategies like Martingale, Fibonacci, or D’Alembert without the fear of losing money. This can help you determine which strategy works best for you.
  3. Building Confidence: Playing roulette can be intimidating for beginners. Practicing for free helps build your confidence, ensuring you’re comfortable when you start playing with real money.
  4. Bankroll Management: Practicing helps you understand the importance of managing your bankroll. You can set limits and learn to stick to them, a crucial skill for responsible gambling.

Different Kinds of Strategies

Various betting systems attempt to manage bankroll and recover losses. Here’s a look at some popular strategies:

  • Martingale System:
    • Principle: Double your bet after each loss to recover previous losses with one win.
    • Risk: Requires a large bankroll and can hit table limits quickly. The exponential growth of bets after consecutive losses can be unsustainable.
  • Fibonacci System:
    • Principle: Follow the Fibonacci sequence for bets. After a loss, the next bet is the sum of the previous two.
    • Risk: Less aggressive than Martingale but still requires a significant bankroll. The sequence grows more slowly but still poses risks over many losses.
  • D’Alembert System:
    • Principle: Increase the bet by one unit after a loss and decrease by one unit after a win.
    • Risk: Lower risk, but slower recovery of losses. It is more manageable for those with smaller bankrolls.

Expected Value and House Edge for European Roulette

House Edge: European Roulette’s house edge is 2.70%, calculated from the single zero on the wheel, which provides the casino’s advantage.

Expected Value: For every $100 wagered, the expected return is $97.30, indicating potential long-term losses.

The house edge is derived as ~2.703%, reflecting the probability of the ball landing on zero.

Roulette Games House Edge

Tip: The lower house edge in European Roulette makes it more favorable compared to American Roulette, which has a 5.26% house edge.

Will Roulette Bonuses Impact Your Winning Chances?

Impact of Bonuses: Roulette bonuses can enhance your initial bankroll, potentially extending gameplay and offsetting early losses.

Wagering Requirements: Most bonuses come with conditions requiring players to wager the bonus amount multiple times before withdrawal.

Example: A $100 bonus with a 30x wagering requirement means you must wager $3000 before cashing out.

Strategy Adjustments: Bonuses allow for more aggressive strategies, as initial risks are mitigated by bonus funds.


European Roulette offers more favorable odds than American Roulette. By understanding the probabilities and payouts of each bet type, you can make informed decisions and employ better strategies to manage your bankroll more effectively. That being said, always consider the house edge and gamble responsibly.

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