Before you sit down, know which wheel you are looking at
Roulette is one of the few casino games where the equipment itself changes the odds. A European wheel has 37 pockets, numbered 0 through 36, with a single zero. An American wheel has 38 pockets because it adds a double zero alongside the single zero. That one extra pocket is not a cosmetic difference: it changes the house edge on nearly every bet you can make, so the first step of playing roulette correctly is reading the wheel before you put a chip down.
The table layout mirrors the wheel. The numbered boxes are arranged in three columns of twelve, with the zero and double zero sitting at the head of the layout. Around the numbered grid sit the outside betting areas: red or black, odd or even, high or low, and the dozens and columns. Your chips do not go on the wheel itself; they go on the layout, and the layout tells the dealer which number or group of numbers you are backing.
From buy-in to first spin
When you sit down, place your cash on the table in front of you rather than handing it to the dealer. The dealer counts it, announces the amount, and gives you roulette chips. These are different from the chips used at other table games: each player at a roulette table gets a colour of chip unique to them, so the dealer can tell whose bet is whose when chips are stacked together on the layout. The value of each chip is printed on the table or shown on a marker.
Once you have chips, you place them on the layout while the betting window is open. The dealer spins the wheel in one direction and sends the ball travelling in the opposite direction along the outer track. At some point the dealer will call that no more bets are being taken, usually as the ball begins to lose speed. Any chip placed after that call does not count, even if it is sitting on a winning number.
When the ball drops into a pocket, the dealer marks the winning number on the layout with a marker, removes all losing bets, and pays the winners. You are not supposed to touch your own chips once the ball has settled; the dealer handles all payouts. After the winning bets are paid, the marker comes off and the next betting window opens.
What each bet pays
Roulette bets split into two families. Inside bets are wagers on specific numbers or small groups of numbers and sit on the numbered grid itself. Outside bets cover broad categories and sit around the grid. The payout for each bet is set by how many numbers it covers: the fewer numbers you back, the larger the payout, and the larger the house edge on most layouts.
| Bet | What it covers | Payout |
|---|---|---|
| Straight up | A single number | 35 to 1 |
| Split | Two adjacent numbers | 17 to 1 |
| Street | Three numbers in a row | 11 to 1 |
| Corner | Four numbers meeting at a corner | 8 to 1 |
| Six line | Six numbers across two rows | 5 to 1 |
| Column or dozen | Twelve numbers | 2 to 1 |
| Red/black, odd/even, high/low | Eighteen numbers | 1 to 1 |
The payout schedule is the same on European and American wheels. What changes is the chance of winning. On a European wheel, a straight-up bet on one number wins one time in 37 on average and pays 35 to 1. On an American wheel, the same bet wins one time in 38 and still pays 35 to 1. The payout did not change, but the chance did, and that is where the house edge comes from. The same logic applies to every bet on the layout: the extra double-zero pocket makes every bet on the American wheel worse for the player than the equivalent bet on the European wheel.
How the house edge differs between bets
Not all roulette bets carry the same edge, and the difference is not small. Outside bets on a European wheel carry a lower edge than inside bets. The worst bet on the table is the American five-number bet, which covers 0, 00, 1, 2 and 3 and pays 6 to 1; its house edge is higher than any other bet on the layout. If a table offers it, it is the one bet that is strictly worse than everything else you could do with the same chip.
The edge on any given bet is fixed by the wheel and the payout, not by how you bet. No sequence of bets, no pattern of increasing or decreasing stakes, and no system of covering multiple sections of the layout changes the edge on each individual wager. What you control is which bets you make and how many spins you play. A player who makes outside bets on a European wheel loses more slowly on average than one who makes five-number bets on an American wheel, because the bets themselves carry different edges.
Decision points during a round
The only real decision in roulette happens before the spin: which bet or combination of bets to place, and how much to stake. Once the ball is moving, nothing you do changes the outcome. There is no skill element in the spin itself, no decision about whether to hit or stand, and no way to influence where the ball lands. That is what makes roulette a game of pure chance rather than a game of decisions.
What you can decide is how to structure a session. You can choose a bet type with a lower edge, you can choose a wheel with only one zero where the venue offers it, and you can decide in advance how many spins you will play and how much you are prepared to lose. Those choices affect the expected rate of loss and the shape of the session. They do not affect whether any individual spin wins.
Procedural mistakes that cost new players
The first mistake is betting after the dealer has called no more bets. It happens most often when a player is still deciding while the ball is already slowing. The call is not a suggestion; chips placed after it are returned or treated as void, and if the number you were reaching for comes up, you have missed the payout. Decide before the spin starts.
The second is touching chips after the ball has landed. The dealer pays winning bets and clears losing ones in a specific order, and a hand in the layout disrupts that. More importantly, reaching for a chip can look like an attempt to move or remove a bet after the result is known. Keep your hands back until the dealer has finished paying and the marker is removed.
The third is assuming every wheel is the same. A player who has learned the payouts on a European wheel and sits down at an American table without noticing the double zero is playing a different game with a different edge. The wheel is visible from the moment you sit down; read it before you buy in.
FAQ
Can I bet on red and black at the same time?
You can, but it does not create a safe bet. On a European wheel the zero pocket means both bets lose when it lands, and on an American wheel the zero and double zero both defeat the pair. Covering both colours changes the distribution of outcomes but not the underlying edge.
What is the difference between a column bet and a dozen bet?
Both cover twelve numbers and pay 2 to 1, but they cover different groups. A column bet covers one of the three vertical columns on the layout. A dozen bet covers one of the three sequential blocks: 1 to 12, 13 to 24, or 25 to 36. The edge is the same; the numbers covered are not.
Do I need to memorise the payouts before playing?
No. The payout for each bet is fixed and printed on the table or available from the dealer. What matters more is understanding that a higher payout means a lower chance of winning, and that the same bet can carry a different edge depending on which wheel you are playing.
Play responsibly
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This article is general information about how these mechanics work. It is not legal advice and not a recommendation to gamble or to use any particular operator. Availability and legality differ by jurisdiction — check the rules that apply where you are.