The wheel is fixed, but the table is where your money moves
You are standing at a roulette table and the ball has just dropped into a pocket. The number is 13. On every standard roulette wheel in the world, that pocket is black. The colour is not a matter of operator choice, table style, or software version. The sequence of red and black pockets around the wheel is part of the game's physical design, and 13 falls on black on both the European single-zero wheel and the American double-zero wheel.
What changes between those two wheels is not the colour of 13, but the number of pockets the ball can land in. That difference feeds directly into the house edge on every bet you place, including a straight-up bet on 13 itself. Before you put chips down, it helps to know how the wheel is built, what each bet pays, and why two wheels that look almost identical can cost you money at different rates.
How the numbers and colours are arranged
A roulette wheel alternates red and black pockets around its circumference. The zero, and the double zero on American wheels, sit in green pockets. The numbers 1 through 36 are split evenly: 18 red and 18 black. The alternating pattern is not a simple red-black-red-black sequence in numerical order, because the numbers themselves are scattered around the wheel rather than running 1, 2, 3 in a circle. The colour assignment, however, is fixed to each number. 13 is black, 14 is red, 15 is black, and so on through the layout.
This matters for a practical reason: the wheel and the betting layout are two different views of the same game. The betting layout arranges numbers in rows and columns for convenience, with red and black indicated by coloured markings. The wheel arranges the same numbers in a physical sequence designed to spread high and low, odd and even, red and black around the circle. A straight-up bet on 13 pays the same regardless of where 13 sits on the wheel.
European and American wheels look alike but do not play alike
The single most important structural difference in roulette is the number of green pockets. A European wheel has 37 pockets: the numbers 1 through 36 plus a single zero. An American wheel has 38 pockets: the same 36 numbers plus a single zero and a double zero. The extra green pocket does not change the colour of 13, but it changes the mathematics of every bet on the table.
On a European wheel, a straight-up bet on any single number, including 13, faces a house edge derived from the fact that there are 37 pockets but a winning straight-up bet pays 35 to 1. On an American wheel, there are 38 pockets and the same 35-to-1 payout. The extra pocket means the player's expected loss on that bet is higher on the American layout. The same applies to red or black bets, odd or even, high or low: the zero pockets are the house's edge on those even-money wagers, and a double zero adds a second pocket that loses for the player.
| Feature | European wheel | American wheel |
|---|---|---|
| Total pockets | 37 | 38 |
| Zero pockets | 1 (single zero) | 2 (single and double zero) |
| Colour of 13 | Black | Black |
| Straight-up payout | 35 to 1 | 35 to 1 |
| House edge on straight-up bet | Lower than American | Higher than European |
| House edge on red/black bet | Lower than American | Higher than European |
Some tables outside the United States also offer a rule variant called la partage or en prison on even-money bets. Under those rules, when the ball lands in zero, the player may lose only half the even-money wager or have it held for the next spin instead of losing the full amount. That rule reduces the house edge on those specific bets, but it does not apply to a straight-up bet on 13. The table's posted rules will state whether such a variant is in effect.
What a straight-up bet on 13 pays
A straight-up bet places your chips on a single number. If the ball lands in that pocket, the payout is 35 to 1. That means a winning bet returns 35 units of profit for every 1 unit wagered, plus the original stake is returned to you. The payout is the same on European and American wheels, and it is the same for 13 as for any other single number.
The payout is not the same as the true odds of the event. On a European wheel, there are 37 pockets, so the true odds against any single number are 36 to 1. The operator pays 35 to 1 and keeps the difference as the house edge. On an American wheel, the true odds are 37 to 1 against, while the payout remains 35 to 1. That gap is why the American wheel carries a higher edge on the same bet.
If you want to cover more of the wheel, you can place a split bet on two adjacent numbers, a street bet on three, a corner bet on four, or a six-line bet on six. Each of those bets pays less than a straight-up bet because it wins more often, but each also carries its own house edge. The table below lays out the main inside bets and how their payouts compare.
| Bet type | Numbers covered | Payout | House edge relative to straight-up |
|---|---|---|---|
| Straight-up | 1 | 35 to 1 | Highest |
| Split | 2 | 17 to 1 | Same as straight-up on same wheel |
| Street | 3 | 11 to 1 | Same as straight-up on same wheel |
| Corner | 4 | 8 to 1 | Same as straight-up on same wheel |
| Six line | 6 | 5 to 1 | Same as straight-up on same wheel |
On a standard European wheel, the house edge on these inside bets is identical from one bet type to the next, because the payout is reduced in proportion to the number of pockets covered. The American wheel raises that edge across all of them because of the extra zero pocket. The exception on some American layouts is a five-number bet covering 0, 00, 1, 2 and 3, which carries a higher edge than the other inside bets. Not every table offers it, and the layout will show it if it is available.
The sequence of a round, from buy-in to settlement
You buy in at the table by placing cash on the layout. The dealer exchanges it for roulette chips, which are specific to that table and often carry no denomination printed on them. You state the value you want each chip to represent, and the dealer marks the stack accordingly. These chips must be exchanged back for regular casino chips before you leave the table, because they have no value at any other table.
Once the dealer clears the previous spin and the marker is lifted from the winning number, the betting window opens. You place chips on the layout for any bet or combination of bets you want. You may bet on a single number, a group of numbers, red or black, odd or even, high or low, or any combination of inside and outside bets. The dealer will call for final bets, and then the ball is spun in the opposite direction to the wheel's rotation.
When the ball settles into a pocket, the dealer places a marker on the winning number on the layout, clears all losing bets, and pays winning bets in order. Outside bets are generally paid first, then inside bets. You should not touch your chips or place new bets until the dealer has finished paying and removed the marker. Grabbing chips early or placing a late bet is the fastest way to create confusion at the table and draw a correction from the dealer.
Where new players go wrong at the wheel
The first procedural mistake is touching chips after the ball has dropped. The dealer needs a clear layout to settle the spin, and any chip moved after the result is known looks like an attempt to alter a wager. Wait for the marker to come off the number before you collect winnings or place the next bet.
The second mistake is treating table chips as cash. Roulette chips are colour-coded per player and per table, and they cannot be carried to another table or cashed at the cage. When you finish playing, ask the dealer to colour you up into regular denomination chips before you step away.
The third mistake is assuming that a number is due because it has not appeared for a while. Each spin is an independent event. The wheel has no memory, and the probability of any single number, including 13, is the same on every spin regardless of what has just happened. No pattern of past results changes the house edge on the next spin.
How to read the table before you sit down
The table layout itself tells you most of what you need to know. The printed minimum and maximum bets are posted on a sign at the table or on the layout. The roulette wheel type is visible at a glance: a single green zero means a European-style wheel, while two green pockets mean an American-style wheel. If a rule like en prison or la partage applies, it will be printed on the layout or stated by the dealer.
For online roulette, the game information panel or help screen states the wheel type, the payout schedule, and the theoretical return to player percentage for the game. RTP is a long-run statistical average across a very large number of spins, not a per-session promise. The same game can show a different RTP for different bet types when rule variants apply, so read the panel for the specific bet you intend to place.
FAQ
Is 13 red or black on every roulette wheel?
Black, on every standard European and American wheel. The colour assignment for each number is fixed by the game's design, so 13 is black whether you are playing at a physical table or an online game.
Does the colour of a number affect the payout?
No. A straight-up bet on 13 pays 35 to 1 exactly as a straight-up bet on any red number would. Colour only matters for red and black outside bets, where the zero pockets are the house's edge.
Why does the American wheel cost more to play if the payouts are the same?
Because the payouts are the same while the wheel has one extra pocket. The double zero adds a pocket that loses for every bet on the layout, which raises the house edge on straight-up, split, street, corner, and even-money bets alike.
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