The Zero Pocket Is the One Green Number on the Layout
On a roulette wheel, the zero is green. It is not red, not black, and not part of the alternating red-black sequence that runs through the numbers 1 to 36. The green zero sits apart, and on an American wheel there is a second green pocket marked 00. A player asking about the colour of zero is usually about to ask a better question: what does that green pocket do to the bets on the table?
Roulette wheels come in two main layouts. A European wheel has 37 pockets: the numbers 1 through 36 plus a single zero. An American wheel has 38 pockets: the same 1 through 36, a single zero, and a double zero. The extra green pocket on the American layout is the reason the house edge differs between the two games, even though the colour of zero is the same.
How the Wheel and the Table Fit Together
The wheel and the betting layout are two views of the same set of outcomes. The wheel is where the ball lands; the layout is where the player places chips. The zero appears on both. On the layout, the zero sits at the end of the number column, usually above the rows for 1-2-3, and it is printed in green to match the pocket on the wheel.
A round of roulette runs in a fixed sequence. The player buys in at the table and receives coloured chips that are worth a stated amount and are used only at that table. The dealer opens the betting window, players place wagers on the layout, and the dealer closes the window and spins the wheel in one direction while sending the ball in the other. When the ball settles in a pocket, the dealer marks the winning number, clears losing bets, and pays winners. The zero is settled like any other number, except that it is not covered by any of the even-money bets.
What the Zero Does to Each Bet Type
The zero is the mechanism through which the house keeps its edge on the even-money bets. A bet on red, black, odd, even, 1-18, or 19-36 loses when the ball lands in zero. The player is not getting a fair coin flip: there are 18 winning numbers and 19 losing numbers on a European wheel, because the green zero loses for all of them. On an American wheel there are 20 losing numbers. That single pocket is enough to tilt the long-run result.
Inside bets treat zero as a number like any other. A straight-up bet on zero pays at the same odds as a straight-up bet on any other single number. A split, street, or corner bet that includes zero pays according to its usual cover. The difference is not in how zero pays when it is bet directly, but in how it behaves when it is not bet: it sits outside the red-black and odd-even systems and quietly takes the even-money wagers.
| Bet type | What it covers | How zero affects it |
|---|---|---|
| Red or black | 18 numbers of one colour | Loses on zero (and 00 on American wheels) |
| Odd or even | 18 numbers of one parity | Loses on zero (and 00 on American wheels) |
| 1-18 or 19-36 | 18 numbers in one half of the range | Loses on zero (and 00 on American wheels) |
| Straight-up on zero | The zero pocket alone | Pays as a normal single-number bet |
| Split or street including zero | Zero plus one or two adjacent numbers | Pays according to the number of positions covered |
European and American Wheels: The Same Green, a Different Edge
Both wheel types colour the zero green, but the number of green pockets changes the mathematics. A European wheel has 37 pockets and one zero; an American wheel has 38 pockets and two zeros. The extra pocket increases the house edge on the American layout for the same bet. That is not a matter of the zero paying differently, but of there being one more losing pocket for most wagers.
The difference is easiest to see on an even-money bet. On a European wheel, the player has 18 winning pockets out of 37. On an American wheel, the player has 18 winning pockets out of 38. The same bet, the same payout, but one more green pocket that belongs to the house. When a player can choose between a single-zero and a double-zero table, the single-zero table is the one with the lower house edge on the same bet.
| Wheel type | Pockets | Zero pockets | Colour of zero | Effect on even-money bets |
|---|---|---|---|---|
| European | 37 | One (0) | Green | 18 winning numbers, 19 losing numbers |
| American | 38 | Two (0 and 00) | Green | 18 winning numbers, 20 losing numbers |
Why Some Players Ask About Zero Before They Play
The question about the colour of zero usually comes from someone reading a strategy guide or checking a wheel photo before sitting down. The colour is the visible clue to the structure of the game. A wheel with one green pocket is a single-zero game; a wheel with two green pockets is a double-zero game. Spotting that difference before buying in tells the player which set of odds they are facing.
The zero also matters for bets that cover large sections of the wheel. Some players place a bet on black and a small straight-up bet on zero as a hedge. That does not remove the house edge; it redistributes outcomes. The straight-up bet on zero wins rarely and pays at its own rate, while the black bet still loses on zero. The combined position has its own expected loss, and no combination of bets changes the built-in edge of the wheel.
How to Read the Table Before You Buy In
Before sitting down, check the table signage and the wheel itself. The layout will show whether the game is single-zero or double-zero, and the wheel will confirm it. The posted minimum and maximum bets are on the table sign. The payout for a straight-up bet is printed on the layout or available from the dealer. None of these figures need to be memorised in advance; they are all visible at the table.
When the dealer exchanges cash for coloured chips, the value of each chip is set for that table only. The player should confirm the value before the first spin, because a stack of chips at a high-value table represents more money than the same stack at a low-value table. The dealer will announce the value when the buy-in is made, and the player can ask for confirmation at any time.
Procedural Mistakes That Cost New Players
The most common mistake at a roulette table is placing a bet after the dealer has closed the window. The dealer announces when no more bets are taken, and any chip placed after that call is returned or disallowed. A player who is still deciding should wait for the next spin rather than push a late bet onto the layout.
A second mistake is confusing the coloured table chips with cash-value chips. The coloured chips are worth a stated amount only at that table and must be exchanged back at the same table before leaving. Walking away with them means walking away with chips that cannot be cashed at the cage. The dealer will exchange them for cash-value chips when the player is done.
A third mistake is assuming that a run of red numbers makes black more likely. Each spin is independent, and the wheel has no memory. The green zero is not "due" any more than any other number is due. The odds on the next spin are the same as on the previous spin, regardless of what has just landed.
What the Green Zero Does Not Change
The zero changes the house edge, but it does not change the nature of the game. Roulette is a negative-expectation game: the house holds an edge on every bet, and the zero is one of the mechanisms that creates it. No betting pattern, progression, or hedge removes that edge. A player who understands the zero understands why the even-money bets are not even, and why the single-zero wheel is the better choice when both are available.
The colour of zero is the same on every standard roulette wheel: green. The number of green pockets is what varies, and that variation is the first thing a player should check before buying in.
FAQ
Is zero red or black in roulette?
Zero is neither red nor black. It is green on both European and American wheels. The green colour marks it as a pocket that sits outside the red-black and odd-even systems, which is why even-money bets lose when zero lands.
Does the double zero change the colour of zero?
No. The double zero is also green. The American wheel has two green pockets, the single zero and the double zero, while the European wheel has one. The extra green pocket increases the house edge on the American layout for the same bet.
Can you bet on zero the same way as any other number?
Yes. A straight-up bet on zero pays as a normal single-number bet, and zero can be included in split, street, or corner bets. The difference is that zero is not covered by the even-money bets, so a bet on red, black, odd, even, 1-18, or 19-36 loses when zero lands.
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