Last Updated on April 27, 2026 by The Official Game Rules Team

Roulette is one of the most iconic casino games in the world, known for its spinning wheel, simple betting system, and fast-paced outcomes. Whether you are playing in a land-based casino or online, the core roulette rules stay the same. What changes is the experience, speed, and sometimes the available betting options.

This complete guide explains how to play roulette, how bets work, the odds and percentages behind each wager, and what you should remember before placing your chips or clicks.

This post contains affiliate links. For more information, see our disclosures here.

How to Play Roulette (Casino & Online Guide)

---

What Is Roulette?

Roulette is a gambling game where players bet on where a small ball will land on a spinning wheel. The wheel is divided into numbered pockets, and each spin produces a random result.

There are three main versions of roulette:

• European Roulette (most common in Europe and online)
• American Roulette (includes an extra double zero)
• French Roulette (similar to European but with special rules that reduce the house edge)

Each version uses the same basic idea but has different odds due to the number of pockets on the wheel.

---

Roulette Wheel Layout

A standard roulette wheel contains numbered slots:

European Roulette:

• Numbers: 1 to 36 + single 0
• Total pockets: 37

American Roulette:

• Numbers: 1 to 36 + 0 + 00
• Total pockets: 38

French Roulette:

• Same layout as European (37 pockets), but with additional rules like “La Partage”

---

Why This Matters (Important for Odds)

The extra “00” in American roulette increases the house advantage significantly. This is one of the most important facts players should understand before betting.

• European house edge: 2.70%
• American house edge: 5.26%
• French roulette (with La Partage): ~1.35% on even-money bets

---

How to Play Roulette (Step-by-Step)

The roulette game is simple once you understand the flow.

Step 1: Place Your Bets

Before the wheel spins, players place chips on the betting table. You can bet on:

• A single number
• A group of numbers
• Colors (red or black)
• Odd or even
• Ranges of numbers

Step 2: The Wheel Spins

The dealer spins the wheel in one direction and releases a ball in the opposite direction.

Step 3: Winning Number is Decided

The ball slows down and lands in a numbered pocket. That number is the winning result.

Step 4: Payouts Are Made

Winning bets are paid out according to fixed odds, and losing bets are collected.

---

Roulette Bet Types Explained

Understanding roulette rules means knowing all betting options. There are two main categories: inside bets and outside bets.

---

Inside Bets (Higher Risk, Higher Reward)

These bets are placed directly on numbers inside the grid.

Straight Up

• Bet on a single number
• Payout: 35 to 1
• Probability (European): 2.70%

Split Bet

• Bet on two adjacent numbers
• Payout: 17 to 1
• Probability: ~5.40%

Street Bet

• Bet on three numbers in a row
• Payout: 11 to 1
• Probability: ~8.11%

Corner Bet

• Bet on four numbers forming a square
• Payout: 8 to 1
• Probability: ~10.81%

Six Line Bet

• Covers two rows (six numbers)
• Payout: 5 to 1
• Probability: ~16.21%

---

Outside Bets (Lower Risk, Higher Frequency Wins)

These bets cover broader outcomes.

Red or Black

• Payout: 1 to 1
• Probability: ~48.65% (European)

Odd or Even

• Payout: 1 to 1
• Probability: ~48.65%

1–18 or 19–36

• Payout: 1 to 1
• Probability: ~48.65%

Dozens (1–12, 13–24, 25–36)

• Payout: 2 to 1
• Probability: ~32.43%

Columns

• Payout: 2 to 1
• Probability: ~32.43%

---

Key Roulette Odds and Percentages

Here are the most important statistics every player should know:

European Roulette (37 numbers)

• House edge: 2.70%
• Winning red/black probability: 48.65%
• Single number hit chance: 2.70%

American Roulette (38 numbers)

• House edge: 5.26%
• Lower win probability due to double zero

French Roulette (with La Partage rule)

• House edge reduced to 1.35% on even-money bets
• Best version for players

---

What Is the House Edge?

The house edge is the built-in advantage the casino has over players. It ensures the casino profits over time.

For example:

• In European roulette, for every €100 bet long-term, the casino expects to keep €2.70 on average.

This does NOT mean you will lose every time—it means the game is statistically tilted over long periods.

---

Online Roulette vs Casino Roulette

The rules of roulette remain the same, but the experience differs.

Casino Roulette

• Physical wheel and ball
• Dealer spins the wheel
• Slower pace
• Social atmosphere

Online Roulette

• Random Number Generator (RNG) or live dealer
• Faster gameplay
• Lower minimum bets
• Multiple tables available instantly

Live Dealer Roulette

• Real dealer streamed online
• Combines online convenience with casino realism

---

Important Roulette Rules to Remember

These rules are critical before playing:

1. Zero is the House Advantage

If the ball lands on 0 (or 00), most outside bets lose.

2. Bets Must Be Placed Before Spin

Once the dealer announces “no more bets,” your wager is locked.

3. Payouts Are Fixed

Roulette does not adjust payouts based on streaks or patterns.

4. Each Spin is Independent

Every spin is random. Past results do NOT influence future spins.

---

Common Roulette Strategies (And Reality Check)

While roulette is a game of chance, players often use betting systems.

Martingale Strategy

• Double your bet after every loss
• Goal: recover losses with one win
• Risk: requires large bankroll and table limits can stop it

Fibonacci System

• Uses a number sequence for betting progression
• Lower risk than Martingale but still no advantage

Flat Betting

• Same bet every round
• Most stable long-term approach

Important truth: No strategy beats the house edge in roulette long-term.

---

Probability Insights (What Players Often Miss)

Here are some useful insights:

• Red and black are NOT exactly 50/50 due to the zero
• Betting on a single number gives a 1 in 37 chance (2.70%)
• Even-money bets have the highest survival rate but not profit advantage
• Long winning streaks are rare and often followed by losses

---

Things Smart Roulette Players Remember

• Always choose European or French roulette over American
• Understand that roulette is entertainment, not a predictable system
• Avoid chasing losses
• Know that short-term wins are random
• Focus on bankroll management instead of “systems”

---

Final Thoughts on Roulette Rules

Roulette is one of the simplest casino games to learn, but understanding the underlying math is what separates casual players from informed ones. The rules are easy: place a bet, spin the wheel, and wait for the result. However, the odds and house edge show that roulette is designed for long-term casino profit.

If you play roulette online or in a casino, the most important skill is not predicting numbers—it’s managing risk, understanding probabilities, and playing responsibly.