The Wheel Layout Is the First Decision You Make
Before you buy in at a roulette table, the single most consequential thing to check is not the minimum bet or the table's colour scheme. It is whether the wheel carries one zero or two. The answer determines the rate at which your money drains away on every spin, before you have placed a single chip.
No, not all roulette has a double zero. Some wheels carry a single zero, some carry both a single zero and a double zero, and a small number of layouts use other arrangements entirely. The difference is not cosmetic. A wheel with 37 pockets and a wheel with 38 pockets are two different games wearing the same name, and the version in front of you dictates the edge on every bet you can make.
When you approach a table, look at the wheel itself, not just the felt. The felt layout usually mirrors the wheel, but the wheel is the source of truth. Count the green pockets. One green pocket means a single-zero wheel. Two green pockets, marked 0 and 00, mean a double-zero wheel.
Why a Second Zero Changes the Arithmetic
Roulette is a game of fixed odds. The wheel has a known number of pockets, each spin is independent of the last, and the payout for a winning bet is set below what the true odds would demand. That gap is the house edge.
On a single-zero wheel, there are 37 pockets. A straight-up bet on one number pays 35 to 1, but the true odds against hitting that number are 36 to 1. The one-unit shortfall across 37 pockets is the house's mathematical advantage. On a double-zero wheel, there are 38 pockets, the straight-up bet still pays 35 to 1, and the true odds against it are now 37 to 1. The extra pocket widens the gap without changing the payout.
The same principle applies to every bet on the layout. The red-black bet pays even money, but the zero pockets are neither red nor black. On a single-zero wheel, the even-money bet loses on one pocket out of 37. On a double-zero wheel, it loses on two pockets out of 38. The second zero does not change what you are paid when you win; it changes how often you win relative to how often you lose.
House edge and return to player are complements for the same bet under the same rule set. They sum to 100%. A higher house edge means a lower theoretical return, and the double-zero layout raises the house edge on every bet on the table compared with its single-zero counterpart.
The Main Wheel Types Compared
Roulette appears under several names, and the name on the sign does not always tell you what the wheel contains. The table below sets out the layouts you are most likely to encounter and what each one means for the player.
| Wheel type | Pockets | Zero pockets | What it means for the player |
|---|---|---|---|
| European | 37 | One (0) | The standard single-zero layout; lower house edge than the American version on the same bets. |
| American | 38 | Two (0 and 00) | The extra pocket increases the house edge on every bet compared with a single-zero wheel. |
| French | 37 | One (0) | Single-zero wheel, often with additional rules on even-money bets that change the effective edge under specific conditions. |
| Other regional variants | Varies | Varies | Some venues use layouts with additional rules or pocket arrangements; the posted table rules govern what applies. |
The labels matter less than the wheel itself. A table marketed as European roulette will have a single zero. A table marketed as American roulette will have two. But the safest check is always the wheel in front of you, because regional naming is not uniform and some venues run multiple layouts on the same floor.
What the Zero Does to Each Bet Type
Different bets on the same table carry different house edges, but the zero pocket is the common thread. It is the pocket that makes every losing bet lose, and it is not covered by the outside bets that most new players reach for first.
An even-money bet such as red or black covers 18 pockets. On a single-zero wheel, 18 wins, 18 opposite-colour pockets lose, and the single zero loses. On a double-zero wheel, 18 wins, 18 lose, and two green pockets lose. The player is still paid 1 to 1 on a win either way. The second zero is a pure addition to the house's side of the ledger.
A straight-up bet on a single number covers one pocket. The payout of 35 to 1 is identical on both wheel types, but the chance of the bet landing is lower on the 38-pocket wheel. The payout has not been adjusted to reflect the extra pocket, which is precisely why the American layout carries a higher edge.
The comparison below shows how the zero interacts with the main bet categories, without attaching a percentage to any of them. The exact edge for a given bet is a function of the wheel type and the rule set, and it is printed in the game information panel or the table's published rules where you play.
| Bet type | What it covers | Payout structure | How the zero affects it |
|---|---|---|---|
| Straight-up | One number | Fixed payout, typically 35 to 1 | The bet loses on any zero pocket; a double zero adds one more losing pocket without raising the payout. |
| Split or street | Two or three adjacent numbers | Fixed payout below true odds | Same principle: the zero pockets are uncovered and count as losses. |
| Even-money outside bets | Red/black, odd/even, high/low | 1 to 1 | Zero pockets are neither red nor black, neither odd nor even, and outside the high-low ranges; they lose on both wheel types. |
| Dozens and columns | Twelve numbers | Fixed payout, commonly 2 to 1 | The zero pockets fall outside the dozens and columns, so they lose on every spin unless a specific rule says otherwise. |
Some French-layout tables include rules that alter what happens to even-money bets when the zero lands, such as returning half the stake or holding the bet for the next spin. Those rules apply only where the table explicitly offers them, and they change the effective edge on those specific bets under those specific conditions. They do not change the wheel itself.
The Sequence of a Round, From Buy-In to Settlement
Sitting down and playing correctly is mostly a matter of knowing when you may touch your chips and when you may not. The round has a clear rhythm, and most procedural mistakes come from acting outside it.
You buy in at the table by placing cash on the felt, never into the dealer's hand. The dealer exchanges it for roulette chips, which are typically a distinct colour so that the table can tell your bets from another player's. These chips have no value away from the table; you cash them in before you leave.
The dealer opens betting for the spin. You place chips on the layout to mark your bets. Inside bets go on the numbered grid; outside bets go on the surrounding boxes for red, black, odd, even, high, low, dozens and columns. You may place multiple bets on the same spin, and you may combine inside and outside bets.
The dealer closes betting, usually with a spoken call and a hand motion, and then launches the ball. From that moment until the dealer clears the layout, you do not touch any chips on the table. Reaching in after the call is the most common procedural error new players make, and it is treated seriously because it can be read as an attempt to alter a bet after the outcome is determined.
The ball lands in a pocket. The dealer marks the winning number on the layout, clears all losing bets, and then pays winning bets. Losing chips are swept first; winners are paid on top of their original stake. You collect your winnings only after the dealer has finished paying the table and pushed the chips toward you.
When you are done, ask the dealer to colour you up. The dealer exchanges your coloured roulette chips for value chips that can be used at other tables or cashed at the cage. Do not walk away from the table with roulette chips, because they are worthless anywhere else.
Decision Points That Matter
Roulette has no skill component in the way that blackjack does. You do not decide whether to hit or stand, and no decision you make changes the outcome of the spin. But you do make real decisions before the ball moves, and they shape your session.
The first is wheel selection. If the floor offers both a single-zero and a double-zero table, the single-zero table is the lower-edge choice on every bet. This is not a strategy for winning; it is a choice that changes the expected rate of loss, which is the only thing a player controls in a negative-expectation game.
The second is bet selection. The bets on a roulette table do not all carry the same edge. On most layouts, the outside even-money bets and the inside straight-up bets sit at different points on the edge spectrum, and some special bets carry worse terms than others. The table rules and the game information panel state the payout for each bet, and the payout relative to the true odds is what determines the edge.
The third is session management. Because every spin is independent, no betting pattern changes the built-in edge. A progression that doubles after losses redistributes the same expected loss across a different sequence of outcomes; it does not remove the edge and it can concentrate losses into a small number of large bets. Setting a session limit and a stopping point before you sit down is a method for controlling how long you play and how much you expose, not a way to change the mathematics.
Checking the Wheel Before You Commit
You do not need to memorise payout tables or edge percentages to sit down correctly. You need to do three things before your first bet.
First, look at the wheel and count the green pockets. One zero or two is the whole question, and the answer is visible from across the room.
Second, read the table's posted minimum and maximum, and check whether the table uses any special rules on even-money bets. The felt usually carries this information, and the dealer will confirm it if you ask before the spin begins.
Third, understand that the wheel type is fixed for the session. You cannot switch a double-zero wheel into a single-zero wheel by choosing different bets, and no bet on the layout escapes the extra pocket. The only way to play a single-zero game is to sit at a single-zero table.
FAQ
Is American roulette always worse than European roulette?
For the same bet under the same rule set, the double-zero wheel carries a higher house edge than the single-zero wheel. That is a structural difference, not a matter of opinion. The only exception would be a table where additional rules alter the effective terms of specific bets, and those rules must be stated on the table before they apply.
Can I bet on the zero to cover it?
Yes. The zero and double zero are numbers on the layout, and you may place a straight-up bet on either or both. Covering the zero does not remove the house edge; it simply adds a bet that wins when the zero lands, at the same payout structure as any other single-number bet. On a double-zero wheel, covering both zero pockets requires two separate bets.
How do I know which wheel a table uses without asking?
Look at the wheel. A double-zero wheel shows a 0 and a 00 in green, and the felt layout includes both. A single-zero wheel shows only the 0. If the wheel is not visible from where you are standing, the table name and the felt layout will usually tell you, but the wheel itself is the definitive check.
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