Roulette looks straightforward, but there’s more going on beneath the wheel than you might think. If you’ve wondered why some numbers get a bad reputation, you’re not the only one — many players want to know which numbers affect their chances and how the odds really work.
A clearer picture of the maths behind the wheel helps you avoid basic misunderstandings and make smarter choices about which games to play. Read on to find out which number is often labelled the “worst”, how the odds are calculated, and what the house edge means for your returns.
What Makes a Number the Worst in Roulette?
Mathematically, every numbered pocket on a roulette wheel has the same probability of being hit on a single spin. That means no regular number is inherently better or worse than any other in terms of chance.
The notion of a “worst” number comes from the game’s layout and payouts, not from differences between numbered pockets. The green pocket or pockets (zero and double zero on some wheels) are the crucial factor because they change the effective odds against players across nearly all bet types. When these green pockets are included in the wheel, payouts are fixed at levels that don’t reflect the true odds of winning, which is how the house retains an advantage.
If you want to see how this plays out between different roulette variants, keep reading — the next section breaks down the common bet types and their payouts.
Understanding Roulette Odds & Payouts
Roulette offers inside bets, which cover specific numbers, and outside bets, which cover broader outcomes. Each bet type carries a distinct probability and a fixed payout.
A straight-up bet on a single number is paid at 35 to 1, while in a wheel with 37 pockets the true chance of that number appearing is 1 in 37. Even-money outside bets, such as red/black or odd/even, pay 1 to 1 but are slightly less than a true 50/50 due to green pockets. Other standard wagers include splits (two numbers, paid 17 to 1), streets (three numbers, paid 11 to 1), and corners (four numbers, paid 8 to 1). Each payout is set below the true odds, which is how the house edge is built into every bet.
Understanding the relationship between payout and probability is the key point here. Knowing which variant you are playing will let you compare those expected returns more accurately.
How Does the House Edge Work in Roulette?
The house edge comes from the mismatch between the payout for winning bets and the actual probability of those bets winning.
In the version with a single zero, there are 37 pockets in total. A single-number hit has a 1 in 37 chance, yet it is paid at 35 to 1 rather than 36 to 1. That shortfall creates an edge of about 2.7%. Where a wheel has both zero and double zero, the extra green pocket changes the odds again while the payout structure remains unchanged, increasing the house edge to about 5.26%.
Over many spins, this fixed percentage produces a predictable long-term advantage for the operator. Short-term results can still vary widely, but the edge defines the expected rate at which stakes are lost on average.
Why Is Zero (or Double Zero) Seen as the Worst Number?
The green zero pockets are the reason they are singled out. They alter the payoff dynamics across almost every kind of bet. When the ball lands in a green pocket, even-money and number bets that would otherwise win can lose, which is why players are particularly wary of these pockets.
Which version you encounter matters. The single-zero setup keeps the house edge lower, while the presence of a double zero raises it. The practical outcome is consistent: more green pockets mean lower expected returns for the player.
Comparing European and American styles will make this difference clearer in the next subsection.
Comparing European vs American Roulette House Edge
The single-zero wheel features 37 pockets and produces an edge of roughly 2.7%, which corresponds to an expected return to the player of about 97.3%.
The double-zero wheel has 38 pockets and a higher edge, about 5.26%, with an expected return around 94.74%. The change is small in absolute terms but significant enough that many players prefer the single-zero game when they have a choice.
Impact of Extra Zero on Player Odds
Adding a double zero does not alter the payouts, but it reduces the chance of winning each bet. That change is permanent in the game’s design and affects every spin and bet in the same way. If you want the best statistical return, choosing a single-zero table is the straightforward option to improve your odds.
Are All Roulette Bets Equally Affected by the House Edge?
For standard bets, the house edge applies uniformly. Whether placing a single-number wager, a split, or an even-money bet, the mathematical advantage remains the same because each payout is calibrated below the true odds.
There are exceptions where specific rules reduce the edge for certain bets. Variants that use rules such as “en prison” or “la partage” return some of the stake when the ball lands on zero, which lowers the effective house edge for even-money bets in those games. Those rule differences are worth seeking out if your objective is to play with smaller margins against you.
Changing bet patterns or stakes does not alter the built-in edge; it only changes your variance and the size of potential wins and losses.
Common Myths About Bad Numbers in Roulette
Many players believe specific numbers appear less often or that past outcomes influence future spins. These ideas rest on a misunderstanding of independent events and the randomness that modern roulette systems are designed to deliver.
Spins are independent, so a previous result does not affect the next one. Claims about certain numbers being inherently worse are not supported by the way the game is constructed or by testing under regulated conditions. Relying on such myths can lead to poor decision-making because they distract from the real factors that determine expected returns.
If you encounter assertions about “patterns” or systems that promise better results, treat them with scepticism and check the math behind the claim.
Key Takeaways on Roulette Odds & House Edge
Roulette is governed by clear mathematical relationships between probabilities and payouts. Understanding those relationships is the best way to set realistic expectations.
House Edge Remains Fixed
The advantage for the operator is set by the wheel configuration and the payout table. It does not change based on how you bet.
All Numbers Share the Same Chance
Every numbered pocket, excluding the difference in green pockets, has the same probability on each spin. The reputation of particular numbers is not supported by the underlying maths.
No Strategy Can Remove the Edge
No betting method can change the built-in house edge. Strategies can alter variance but not the long-term expected return.
Play Within Your Limits
Decide in advance what you can afford to stake, and keep sessions within those bounds. If gambling is causing you concern, advice and support services are available.