Is 0 an Even Number in Roulette? Understanding Roulette Number Rules

If you’ve ever watched a roulette wheel, you’ll have noticed the green zero slot that looks unlike any other number on the wheel. It is not red or black, and players rarely place the same types of bets on it as they do on the numbers 1 to 36.

That raises a straightforward question: does zero count as an even number for the table bets labelled “even”? The answer matters because it changes how common even-money bets behave and how the house edge is calculated.

This article explains exactly how zero works on the table, compares the main wheel types, untangles common misunderstandings, and leaves you with the key points to look for when choosing a game.

The Unique Role of Zero on the Roulette Table

Zero has a special status on the table and in the rules. It is set apart visually and mechanically from the numbers 1 to 36. The outside bets that cover red or black, odd or even, and high or low explicitly apply only to the 1–36 range, so a spin that lands on zero causes those bets to lose.

There are two common wheel layouts: one with a single zero and one with both a zero and a double zero. That difference changes the total number of pockets and therefore the statistical advantage the house holds. The way zero is handled on the table is the reason roulette does not offer a true 50/50 payout on even-money bets.

Zero also serves other practical purposes on the layout. It provides a distinct outcome that operators and players treat separately, so rules, payouts, and any special handling of a zero result are clearly printed on the betting layout or in the game rules.

Looking at this from the player’s perspective makes the next question natural: how do we define even and odd on the table?

How Are Even and Odd Numbers Defined in Roulette?

The table’s even and odd bets apply only to the integers 1 through 36. Even numbers are those divisible by two without a remainder, so examples include 2, 4, 6, and up to 36. Odd numbers are those that leave a remainder when divided by two, such as 1, 3, 5, up to 35.

Zero is not included in either category. The betting layout reflects this by placing the even and odd markers in a way that covers only 1–36. That single, separate pocket is why the even-money bets do not represent exact halves of the wheel’s outcomes.

Because this classification is standard across regulated games, you can expect the same treatment of zero whenever you check a game’s published rules.

If you want to appreciate the effect zero has on odds, the comparison between wheel types shows that clearly.

Why Does Zero Matter in Roulette Outcomes?

Zero directly affects the outcome of many common bets. When the ball lands on zero, outside bets designed to cover about half the numbers—red or black, odd or even, and high or low—typically lose. This single result is what prevents those bets from being true 50/50 propositions.

The presence of one or two zero pockets changes the proportion of winning outcomes on any given spin. With a single zero, there are 37 pockets in total; with a double zero added, there are 38. That difference increases the house advantage because those zero pockets are not covered by the even-money wagers.

This effect is the fundamental reason the house maintains an edge in roulette. It is worth checking the game rules and the number of pockets before joining a table, because that simple detail has a measurable impact on long-run probabilities and payouts.

To avoid confusion, the next section separates myth from fact about zero’s role.

Common Myths About Zero in Roulette Explained

A number of misconceptions circulate about zero. One common myth is that zero counts as an even number for betting purposes. In practice, this is incorrect: zero is excluded from both even and odd bets. Another mistaken idea is that special betting systems can neutralise the effect of zero and remove the house advantage. While different staking approaches vary short-term outcomes, they do not change the underlying rules or the statistical edge created by the zero pocket or pockets.

Some players assume zero makes the game unfair in a secretive way, but the pocket’s existence and treatment are explicit in the rules. Regulated games state how zero is handled, and the mathematics of the wheel explain why that outcome produces the house advantage.

If you want a clear comparison of how single-zero and double-zero wheels differ in their long-term figures, the next section covers that difference directly.

Comparing Zero in European vs American Roulette Wheels

The primary distinction between the common wheel types is simple: European-style wheels have a single zero, while American-style wheels include both a single zero and a double zero. That means 37 pockets on the European wheel and 38 on the American wheel.

This extra pocket has a small but definite effect on probabilities and the house advantage. On a wheel with one zero, the chance of any single number appearing on a spin is 1 in 37. On a wheel with two zeros, each number has a 1 in 38 chance. For outside bets that ignore zeros, the proportion of losing results increases when a second zero is present.

Players often prefer single-zero games because they reduce the built-in house margin compared with double-zero wheels. Examining a game’s rules to confirm how many zero pockets are in play is a quick way to understand which version you are facing.

With that comparison in mind, here are the practical takeaways every player should keep front of mind.

Summary: What Every Roulette Player Should Know About Zero

Zero is not an even number for betting purposes; it stands apart from the even and odd categories that cover numbers 1 to 36. Its presence, whether as one pocket or two, is the mechanism that creates the house edge in roulette.

When choosing a game, check whether the wheel uses a single zero or both a single and a double zero, because that choice changes the proportion of winning outcomes. Look to the published rules so you understand how zero is treated on the specific table you play.

Keep your expectations realistic about how odds and payouts relate to the wheel layout, and use the game information available to make informed choices. If you would like to compare specific roulette options side by side or need clarification on a rule you’ve seen, our guides and comparison tools are kept up to date to help you decide with confidence.

Play within your limits and be aware of the rules that shape each game, and you’ll have a clearer, more informed roulette experience.

_{**The information provided in this blog is intended for educational purposes and should not be construed as betting advice or a guarantee of success. Always gamble responsibly.}