Is 0 Even or Odd in Roulette? Understanding Zero on the Wheel

Ever found yourself staring at the roulette wheel, wondering where zero actually fits in? You’re not alone. That single green slot has caused confusion for countless players, especially when it comes to betting on even or odd numbers.

Roulette’s zero is a little mysterious, but understanding it can change how you read the table and make sense of the bets on offer. Whether you’re placing a friendly flutter or just curious about casino quirks, knowing the facts about zero is a must.

Ready to clear up the myths and get to grips with what zero really means in roulette? Let’s break it down together.

Does 0 Count As Even Or Odd In Roulette?

When it comes to roulette, the zero stands completely apart from the rest of the numbers. Unlike the reds and blacks, or the clear‑cut evens and odds, zero is marked in green on the wheel and does not count as either even or odd.

This separation is intentional and affects how several bet types work. By sitting outside the red/black and even/odd groups, zero changes the probabilities on so‑called even‑money bets and is a key part of the game’s design.

On a European (single‑zero) wheel, there is one green 0. Some American wheels also include a 00 pocket, but the same principle applies: neither 0 nor 00 belongs to the red/black or even/odd groups. French layouts follow the single‑zero format as well.

Because of this extra pocket (or pockets), the house has an in‑built edge. On European roulette, the house edge is typically 2.70%. On American double‑zero wheels, it is usually 5.26%, reflecting the additional 00 pocket.

If you place a bet on an even or odd outcome and the ball lands on zero, the bet loses. These “even‑money” bets therefore are not true 50/50 propositions, because zero is excluded from their coverage.

In practical terms, on a single‑zero wheel an even‑money bet wins on 18 out of 37 pockets and loses on 19, and on a double‑zero wheel it wins on 18 out of 38 pockets. This difference explains why outcomes on these bets cannot be perfectly balanced over time.

In some venues and only on specific tables, special rules such as la partage or en prison may apply when zero hits, potentially reducing the loss on certain even‑money bets. Under la partage, half your qualifying stake is returned when the result is zero.

With en prison, your qualifying stake is held for the next spin if zero lands, and its release depends on that subsequent result. These rules are not universal, often apply only on single‑zero games, and will be clearly stated at the table where they apply. Always check the posted rules before playing.

So, even though zero is mathematically an even number, roulette rules set it aside. Its presence is a core part of how the house maintains an edge on all bets and also allows for distinct betting options, such as wagers on zero and its neighbours.

Outcomes are random and cannot be predicted. Play for entertainment only, set limits, and never chase losses. If gambling stops being fun, take a break or seek support. You must be 18+ to gamble in the UK.

Why Is Zero On The Roulette Wheel?

Zero is on the roulette wheel for a clear reason: it gives the house a built‑in advantage. From the earliest versions of the game, adding the green zero made standard even‑money bets, such as red or black and even or odd, slightly less likely to win. Outcomes are random, and the zero provides a small but consistent edge to the operator that is part of the game’s design.

This edge is mathematical rather than based on any pattern or influence. Each spin is independent, and the presence of zero ensures the expected return to the player is below 100% over the long term.

Because zero is neither red nor black, and neither even nor odd, those even‑money bets lose when the ball lands on green. On a European wheel there are 18 red numbers and 18 black numbers, but 37 pockets in total, so a red bet wins 18 out of 37 on average rather than 1 out of 2.

That subtle shift reduces the true probability of winning compared with the even‑payout displayed on the felt. The payout may be 1:1, but the chance of success is 18/37, not 19/38 or 1/2, which creates the house margin.

With zero included, every type of bet is a touch less likely to come in than the payout might suggest. Straight‑ups, splits, streets and dozens all face the same principle: the odds paid are slightly lower than the true odds of the ball landing on those selections.

Over time that small difference keeps the game profitable for the operator and cannot be overcome by systems or staking plans. Strategies such as increasing stakes after losses do not change the underlying probabilities and increase the risk of faster losses.

In European roulette there is a single green zero, while American roulette adds a double zero for a larger edge. As a guide, the house edge is typically around 2.70% on European wheels (37 pockets) and around 5.26% on American wheels (38 pockets).

That design choice shows up most clearly on even and odd bets, but it also influences all other bet types. Some French variants keep the single zero but present a slightly different layout; the principle of the house edge remains the same.

Some tables use specific rules, such as la partage or en prison, which can reduce the impact of zero on certain even‑money bets when it hits. For example, la partage usually returns half your even‑money stake if the ball lands on zero, lowering the effective house edge on those bets.

These rules do not eliminate the advantage entirely, but they can make even‑money wagers more favourable compared with tables that offer no such concessions. Always check the table rules so you understand how zero is treated before you play.

Gambling should be viewed as entertainment, not a way to make money. Set clear limits on time and spend, only stake what you can afford to lose, and never chase losses.

If it stops being fun, step away and take a break. You must be over 18 to gamble in Great Britain. If you are concerned about your gambling, consider using safer gambling tools or seeking support.

How Does Zero Affect Even And Odd Bets?

Zero has a direct effect on even and odd bets. When you place a chip on even or odd, you are backing one of 18 numbers (excluding zero), and these bets typically pay 1:1 when they win. The green zero pocket is not counted as even or odd, which is central to how these wagers work and why they are not perfectly balanced.

On a European wheel there are 37 pockets in total, so the theoretical chance of your even/odd bet winning is 18 out of 37, about 48.65 percent. On an American wheel it is 18 out of 38, about 47.37 percent, because of the additional double-zero pocket. In both cases, the presence of zero (and double zero, where used) slightly reduces the likelihood that an even/odd stake will win on any given spin.

This shortfall from a 50–50 outcome creates the house edge on these wagers: roughly 2.70 percent on single-zero European wheels and about 5.26 percent on double-zero American wheels. Over time, that advantage means average returns will be lower than the total staked, even though payouts are 1:1 when you do win.

To illustrate, if you repeatedly staked £10 on even on a European wheel, the long‑term average loss is expected to be around 27p per £10 staked (2.70 percent), although actual results will vary from spin to spin. This is a mathematical expectation rather than a guarantee for any short session.

If the ball lands on zero, neither even nor odd wins, so the stake is lost under standard rules. Zero (and double zero, where used) is neither even nor odd, which is why these bets are never a true 50–50 proposition on any wheel. The table minimum and maximum limits still apply; the treatment of zero simply affects settlement of the bet.

On some single-zero European or French tables, there may be additional rules that change how a zero outcome is settled. With la partage, if zero lands your stake is split and half is returned to you, with the other half lost. For example, a £20 even bet would see £10 returned and £10 forfeited when zero appears.

With en prison, your stake is held “in prison” for the next spin. If that next spin wins for your side (even or odd, as placed), your original stake is returned with no profit; if it loses—or zero appears again—the stake is forfeited. These rules can reduce the effective house edge on even‑money bets, but only where they are explicitly offered.

These variants are not universal, may have table‑specific conditions, and are generally not offered on double-zero wheels. Always check the table rules and paytable at your venue—whether playing online or in a land‑based casino—before placing a bet so you understand exactly how zero is treated and how settlements work.

Roulette outcomes are random and no strategy can remove the house edge. Set a budget and time limits, avoid chasing losses, and only gamble what you can afford to lose. If play stops being fun, take a break or seek support. Gambling should be viewed as entertainment, not a way to make money.

What Happens To Your Bet When Zero Comes Up?

If the roulette ball lands on zero, what happens to your bet depends on the wager type and the specific table rules in use. Zero is neither red nor black, neither odd nor even, and it is not counted in high or low.

Zero is usually coloured green and sits outside the dozens and columns. Because it is excluded from most even-money groupings, its appearance is a key part of the built-in house advantage.

For most even-money bets, such as red or black, odd or even, or high or low, the stake is lost because zero is not included in any of these groups. The bet is settled immediately with no return unless a table rule explicitly states otherwise.

Number-specific bets that include zero (for example, a straight-up on 0, or splits and trios that involve 0 on the layout) are settled normally according to the posted paytable. Typical payouts apply, such as 35:1 for a straight-up and 17:1 for a split, but always rely on the table’s own paytable where displayed.

Table variants can change this outcome for even-money bets. Some European and French tables offer rules that mitigate the impact of zero. With La Partage, you receive back half your stake on even-money bets if the ball lands on zero; the remaining half is lost. This does not apply to dozens, columns, or other non–even-money wagers.

With En Prison, your even-money bet is held on the layout for one more spin if zero appears. On that next spin, if the bet’s condition wins, you typically recover your original stake without additional profit. If it loses, the stake is forfeited.

If zero appears again under En Prison, treatment varies by house rules (it may be lost or left “in prison” again), so check the table rules before you play. Availability of La Partage or En Prison can differ between casinos and game versions.

These rule variations only affect even-money bets and can change the mathematical edge. As a guide, on single-zero roulette the house edge on even-money bets is typically around 2.70%, but with La Partage it is commonly reduced to about 1.35%. On American double-zero wheels, these rules are usually not offered and the edge on equivalent even-money bets is around 5.26%.

House edge figures are theoretical averages based on long-term play and may vary by game variant and specific rules. Always refer to the game information and paytable supplied at the table or within the game interface.

It is worth checking the rules at your table before you start, as these variations can change how zero is handled in practice. Wheel layout matters too: single-zero (European/French) and double-zero (American) wheels have different numbers of zero pockets, which affects the odds and the house advantage.

Outcomes are random and independent; zero can appear at any time, and no staking method or system can alter the odds or guarantee a return. If you are unsure about how a bet is settled, ask the dealer or consult the table rules.

Set a budget, play within your means, and take breaks. Only gamble with money you can afford to lose. 18+ only. If gambling stops being fun, stop and seek support.

Single Zero Versus Double Zero: What’s The Difference?

Roulette wheels come in two main types: single zero and double zero. European and French roulette use the single zero, while American roulette adds a double zero pocket as well.

The layouts look similar at a glance, but the extra green pocket on the American wheel, and the additional 00 position on the betting layout, subtly change how often bets can win and how the maths works over time.

That extra green slot reduces the chance of any bet winning and increases the house edge. As a guide, a single zero wheel typically carries a house edge of about 2.70%, while a double zero (American) wheel is around 5.26% on most standard bets.

The difference exists because headline payouts usually remain the same even though the number of pockets changes. For example, a straight-up still pays 35:1, but the true odds are 36:1 on single zero and 37:1 on double zero, creating the built-in edge.

All else being equal, the single zero version is generally the more favourable option for players. Some French tables also use La Partage or En Prison to reduce the impact of zero on even-money bets (red/black, odd/even, high/low).

With La Partage, for example, half your even-money stake is returned when zero lands, lowering the effective house edge on those bets to about 1.35%. En Prison holds your even-money stake for the next spin instead, which can have a similar effect depending on the outcome.

Do note that these rule variations apply to even-money bets only and may not be available on all tables. American wheels may also offer a top-line (five-number) bet covering 0, 00, 1, 2, and 3, which typically carries a higher house edge than other bets.

Availability of rules and side bets varies by table, provider, and jurisdiction, so always check the displayed game rules before you play. Minimum and maximum stakes, table limits, and any special conditions should be listed clearly.

Return to Player (RTP) information and specific rule variations should be available in the help or info section. RTP is a long-term theoretical measure and does not predict short-term results for individual sessions.

Those extra green pockets change the probabilities behind every payout. For instance, a straight-up has a 1 in 37 chance on single zero versus 1 in 38 on double zero, even though both pay 35:1.

Outcomes are random and never guaranteed. Online games use certified random number generators; physical wheels rely on mechanical randomness. Past results do not influence future spins.

Set limits, take breaks, and only play with money you can afford to lose. If play stops being fun, consider stepping away and seeking support where appropriate.

How Zero Changes The Odds And House Edge

Zero is the hinge that shifts roulette away from a true 50–50 game. Payouts are set as if there were 36 numbers, yet a European wheel has 37 pockets and an American wheel has 38. For example, a straight-up win pays 35:1 even though there are 37 or 38 possible outcomes. That gap between the payout and the true probability creates the house edge and ensures the game always slightly favours the house over the long run.

This edge applies even to the simplest bets. “Red/black” and “odd/even” look like even-money wagers, but zero (and double zero on American wheels) are neither red nor black, odd nor even. As a result, these bets will lose when the ball lands on green, which is where the house edge comes from in practice.

On European roulette with a single zero, the edge is about 2.70% across standard bets. On American roulette with an extra double zero, it rises to about 5.26%. More green pockets mean a larger edge for the house, because the payouts do not increase to reflect the extra outcomes.

Some tables use additional rules on even-money bets, such as la partage or en prison, where a zero outcome may return half your stake or hold it for the next spin. These rules reduce the effective edge on those specific bets (for example to around 1.35% with la partage), but they do not remove it.

These figures are long‑term theoretical averages, sometimes called the expected loss per unit wagered. They describe how the game is designed and do not predict what will happen in any short session or on any single spin.

Most standard bets on the layout carry the same edge because the payouts are calibrated to the number of pockets. An exception is the American five‑number bet (0, 00, 1, 2, 3), which has a higher edge and therefore a worse expected return than other options on that wheel.

Understanding this structure helps set realistic expectations and makes outcomes easier to interpret. No staking or betting system can remove the house edge, and each spin is independent and random. Past results do not influence future outcomes.

If you choose to play, set a budget and time limits, take regular breaks, and never chase losses. Only gamble what you can afford to lose, and stop if it stops being fun. Support is available if you feel your play is becoming harmful.

How To Read Payouts For Even/Odd Bets

Even and odd bets are straightforward even‑money wagers that pay 1 to 1 (often shown as “evens”, “Even”, or 1:1). A winning bet returns your original stake plus the same amount again in winnings, so the total return is stake + profit.

For example, a £10 bet on Even that wins returns £20 in total: £10 profit and your £10 stake back. The same logic holds if you back Odd instead—only the colour or number characteristic changes, not the payout rate.

The same approach applies whatever you stake, subject to the table’s minimum and maximum limits and any chip denomination constraints. A £5 win returns £10, a £25 win returns £50, and so on. Your net profit on a winning even‑money bet is always equal to your stake.

In some games, very small stakes may be rounded to the nearest available chip, which can affect the exact cash-out amount. Check how the table handles rounding so you understand how totals are calculated.

If zero lands, the bet normally loses, as zero is neither even nor odd. However, some European tables apply La Partage (you lose only half your stake on zero) or En Prison (your stake is “held” for the next spin and resolved then). These rules, where offered, reduce the house edge on even‑money bets but do not eliminate it.

La Partage typically returns 50% of your stake on a zero; En Prison defers settlement to the next spin, where the stake is released if your selection wins and lost if it does not. Always confirm which rule, if any, is in use before you play.

Availability of these rules varies by game type and operator. Single‑zero (European) and double‑zero (American) wheels have different odds, and the specific table rules can change the expected return to player (RTP). The RTP is a long‑term theoretical figure; short‑term results will vary.

Always check the table layout, on‑screen help, and paytable before you start so you know exactly how even‑money bets are settled on zero and what the payout terms are. If anything is unclear, pause and ask support for confirmation before placing a bet.

That clarity also helps dispel common myths. Previous spins do not influence future results, and no staking system or pattern can guarantee a profit. Outcomes are random, and over time the house edge means losses are possible even when placing only even‑money bets.

Only gamble if you are 18+ and can do so safely. Set sensible limits, consider time and deposit controls, and take breaks. Never chase losses, and stop if it stops being fun. If you need help, tools such as self‑exclusion and reality checks are available through most operators.

Examples are for illustration only and do not guarantee outcomes. Bet responsibly and only with money you can afford to lose.

Common Misconceptions About Zero In Roulette

Many players assume zero is just another number on the wheel, but it is not treated that way on the layout. It sits outside the usual “outside” betting groups, and that difference affects how a range of common bets are settled.

On the table, the zero has its own green box and is not grouped with the even‑money selections or the number ranges. This means outcomes on dozens, columns, and other outside bets are handled differently when zero lands, even though it appears on the same wheel as all other numbers.

One frequent mistake is to think zero counts as an even number during betting, when in fact it is excluded from the even and odd groups. If zero lands, standard even/odd bets are not winners, because zero is neither even nor odd on the betting layout.

To illustrate, a £10 bet on “Even” loses if the ball stops on zero, as the wager does not cover that pocket. This treatment applies consistently across even‑money selections unless a specific table rule states otherwise.

Another misconception is that zero belongs with red or black, or with high and low ranges. It does not. Zero always stands alone in its own green pocket, and outside bets on colour or high/low typically lose when zero hits.

The same principle applies to other outside bets such as dozens (1–12, 13–24, 25–36) and columns. Zero is not included in any of those groups, so a spin landing on zero will normally see those wagers lose in the absence of a special rule.

Note that wheel layouts vary by game type. European and French roulette have a single zero, while American roulette usually adds a double zero (00). The presence of zero (and 00 on American wheels) changes the probabilities and is a key reason why the house maintains an edge.

As a guide, single‑zero roulette typically has a house edge of around 2.70% (about 97.30% RTP), whereas double‑zero roulette is commonly around 5.26% (about 94.74% RTP). These figures are theoretical, calculated over a large number of spins, and are not a prediction of your results.

Some also believe an even or odd bet should push or pay if zero lands. Unless your table uses a rule such as La Partage or En Prison, the standard outcome is that the stake is lost.

With La Partage, half your even‑money stake is returned when zero hits; with En Prison, your stake is held for the next spin and settled then. These options usually apply to even‑money bets only, and availability varies by table and venue, so always check the rules and the paytable before you play.

Understanding zero helps set realistic expectations. It is the element that gives the house its advantage on many outside bets, and the Return to Player (RTP) differs between European/French and American versions.

No betting system can remove the house edge, spins are independent, and outcomes are random on every spin. Past results do not influence future ones, and there is no strategy that can guarantee a profit.

Play for entertainment, set sensible limits, and avoid chasing losses. Only wager what you can afford to lose, consider time and spend limits, and take breaks regularly.

If gambling stops being fun or you feel it is affecting you, consider seeking support from recognised organisations. You must be over 18 to gamble in the UK.

_{**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.}