European roulette wheel
The single-zero wheel with all 37 numbers in order, the number sequence and key odds.
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Wheel guide · Updated
A European roulette wheel has 37 pockets numbered 0 to 36. An American wheel has 38, because it adds 00. Numbers 1 to 36 alternate red and black, and the zeros are green. Spin the wheel here, then explore the number order, the parts of a casino wheel and the rules dealers follow.
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Numbers and colors
Every roulette wheel carries the numbers 1 to 36, half red and half black. What changes is the green: one zero on a European wheel, two on an American wheel and three on a triple zero wheel.
The same colors appear on the wheel and on the betting table. From 1 to 10 and 19 to 28, odd numbers are red and even numbers are black. From 11 to 18 and 29 to 36 it flips: odd numbers are black and even numbers are red.
Red: 1, 3, 5, 7, 9, 12, 14, 16, 18, 19, 21, 23, 25, 27, 30, 32, 34, 36. Black: 2, 4, 6, 8, 10, 11, 13, 15, 17, 20, 22, 24, 26, 28, 29, 31, 33, 35. Green: 0, 00 and 000.
European37 pockets
American38 pockets
Triple zero39 pockets
The French wheel uses the European order. These are the standard orders New Jersey's gaming rules set for single and double zero wheels; a regulator can approve others, so a few wheels differ. Compare the first two wheels in detail in European vs American roulette.
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Tap any pocket to see its color, its neighbors on the wheel and what sits across from it. Then switch the view to see how colors, odd and even, high and low, dozens and columns are spread around the wheel.
Number 32
The order spreads the numbers out so no part of the wheel looks lopsided. It makes no difference to your odds: every pocket is the same size and equally likely to catch the ball.
Anatomy
A casino wheel is two main pieces: a fixed bowl with the ball track, and a rotor that spins inside it carrying the numbered pockets. Hover over or tap a part to find it on the wheel.
The spin
The wheel and the ball always travel in opposite directions, and the rules for a valid spin are written into state gaming regulations. Here's what happens on every spin at a casino table.
The dealer sets the rotor turning with the turret, in one direction.
The ball is spun around the track in the opposite direction. Gaming rules in New Jersey and Maryland require it.
While the ball is still circling, the dealer calls "No more bets." The ball has to go around the track at least four times for the spin to count.
As it slows, the ball drops off the track, hits the deflectors and bounces across the frets.
The pocket it stops in is the winning number. The dealer marks it on the layout, clears the losing bets and pays the winners.
Under Maryland's roulette rules, the dealer calls "no spin" and spins again if:
Online, software roulette picks the number with a random number generator instead of a physical ball. Live dealer roulette uses a real wheel and dealer filmed in a studio. Try a full table with free chips in our roulette simulator, or learn the bets in how to play roulette.
Wheel types
All three carry 1 to 36 and pay the same amounts. The extra zeros are the only difference, and each one makes every bet cost more.
| Feature | European | American | Triple zero |
|---|---|---|---|
| Pockets | 37 | 38 | 39 |
| Green pockets | 0 | 0 and 00 | 0, 00 and 000 |
| Where the zeros sit | 0 between 26 and 32 | 0 and 00 directly across from each other | 0, 000 and 00 side by side |
| Number order | European order | Its own order | European order, with 000 and 00 after 0 |
| House edge | 2.70% | 5.26% (7.89% on the five-number bet) | 7.69% |
| Where you'll find it | Online, and most casinos outside the US | Most US casino tables | Some Las Vegas casinos |
A French wheel is the European wheel, often with La Partage on even-money bets. More on each: European vs American roulette · French roulette · triple zero roulette.
Interactive
Is there a number that comes up more often? On a fair wheel, no. Spin it 1,000 or 10,000 times below and some numbers will look "hot" and others "cold". Run it again and they change.
Each spin is independent. A number that just hit is exactly as likely to hit again, and a number that hasn't come up in 100 spins isn't "due". Over 1,000 spins, the gap between the hottest and coldest number is usually big enough to look meaningful. It isn't.
The famous lucky number is 17: Sean Connery won on it three times in a row at Saint-Vincent, Italy, in 1963. The odds of that streak were the same as for any other number.
Betting systems don't change any of this. See what eight of them did over thousands of sessions in roulette strategies tested.
A worn, dirty or tilted wheel can favor some pockets. Players have exploited that for 150 years:
Casinos fight back by checking wheels are level, tracking results with software, swapping wheel heads between tables and fitting pocket rings that rotate. Some wheels also randomize how fast the rotor slows down after "No more bets."
History
Many historians credit French mathematician Blaise Pascal with a primitive roulette wheel, a by-product of his search for a perpetual motion machine.
Roulette is played in its modern form in Paris, at the Palais Royal. Early Paris wheels colored the single zero red and the double zero black; green came later, to avoid confusion.
In the United States, the double-zero wheel spreads from New Orleans up the Mississippi and west. Some early American wheels even had a third house pocket, the American Eagle.
François and Louis Blanc open a single-zero wheel in Bad Homburg, Germany, to beat rival casinos on odds. The Blanc family later takes the game to Monte Carlo.
Joseph Jagger wins at Monte Carlo by spotting a wheel that favored some numbers.
Edward Thorp and Claude Shannon build the first wearable computer, designed to predict where the ball would land.
The Venetian in Las Vegas introduces triple zero roulette, with a 000 pocket.
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Print-ready wheels and charts to keep or use in your own guide. They're free to use, including on your site, as long as you link back to this page.
The single-zero wheel with all 37 numbers in order, the number sequence and key odds.
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The double-zero wheel with all 38 numbers in order, 0 and 00 across from each other.
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Every number's color, both wheel orders and the key counts on one sheet.
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A labeled casino wheel: bowl, ball track, deflectors, rotor, pockets, frets, cone and turret.
PNG · 3000 × 2000 px
A European or French wheel has 37 numbers: 0 and 1 to 36. An American wheel has 38, because it adds 00. Triple zero wheels have 39, with 0, 00 and 000.
36. Every standard wheel carries 1 to 36, plus one, two or three green zero pockets.
18 red and 18 black. The zeros are green, so they count as neither.
Green, and so are 00 and 000. Bets on red or black, odd or even, and high or low all lose when a zero comes up, unless the table uses La Partage or En Prison.
Black. 17 is also black, and 1 is red. The color chart on this page shows every number.
666. Adding 0 + 1 + 2 and so on up to 36 gives 666, which is why roulette is sometimes called the devil's wheel.
Clockwise from 0: 0, 32, 15, 19, 4, 21, 2, 25, 17, 34, 6, 27, 13, 36, 11, 30, 8, 23, 10, 5, 24, 16, 33, 1, 20, 14, 31, 9, 22, 18, 29, 7, 28, 12, 35, 3, 26.
Clockwise from 0: 0, 28, 9, 26, 30, 11, 7, 20, 32, 17, 5, 22, 34, 15, 3, 24, 36, 13, 1, 00, 27, 10, 25, 29, 12, 8, 19, 31, 18, 6, 21, 33, 16, 4, 23, 35, 14, 2.
To spread them out. Red and black alternate all the way round, and on a European wheel high and low numbers alternate too, except where 5 sits next to 10. The order makes no difference to your odds, since every pocket is equally likely.
On an American wheel, 00 sits directly across from 0. On a European wheel, 0 faces the gap between 10 and 5.
The rotor and the ball always go in opposite directions. Gaming rules in New Jersey and Maryland require it, and the ball has to go around at least four times for the spin to count.
The bowl, the ball track, the deflectors (often called diamonds), the rotor or wheel head, the number ring, the pockets and frets, the cone and the turret.
New Jersey requires a wheel at least 30 inches across. Cammegh, a major wheel maker, builds its standard wheel at 80 cm, about 31.5 inches.
A non-metallic material, such as the Ivorine and Teflon balls made by Cammegh; Ivorine bounces more. New Jersey and Maryland require a ball 3/4 to 7/8 of an inch across unless the regulator approves another size, and in Maryland staff pass it over a magnet or compass before the table opens.
Many historians credit Blaise Pascal, who built a primitive version in the 17th century while trying to make a perpetual motion machine. The modern game was being played in Paris by 1796, and François and Louis Blanc introduced the single-zero wheel in 1843.
There isn't one. On a fair wheel every pocket has the same chance on every spin: 1 in 37 on a European wheel and 1 in 38 on an American wheel. 17 is a famous favorite: Sean Connery won on it three times in a row in 1963.
35 to 1 on a single number. You get 36 chips back counting your own stake, which is why you sometimes see it written as 36 for 1.
Not with a betting system: every bet keeps the same house edge. A few players have beaten worn or tilted wheels that favored some numbers, but casinos now check that wheels are level and rotate parts to stop that.
Software roulette picks the number with a random number generator instead of a physical ball. Live dealer roulette uses a real wheel in a studio. The wheel on this page uses your browser's secure random number generator.
Sources: N.J.A.C. 13:69E-1.7, roulette wheels · N.J.A.C. 13:69E-1.8, roulette balls · N.J.A.C. 13:69F-5.3, rotation of wheel and ball · Maryland Lottery and Gaming: Roulette Standard Rules · Cammegh wheel brochure · US patent 6,047,965 (deflector layout) · DataGenetics: the roulette wheel layout · Wikipedia: Roulette (history)
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