Why a number that wins once in 37 tries pays 35 to 1
You are standing at the rail, chips in hand, looking at a felt layout covered in numbers, colours and words. The first thing to understand is that every payout on that layout is built from the same arithmetic. A straight-up bet on a single number pays 35 to 1 on a European wheel, not because the casino is generous, but because there are 37 pockets and only one of them is yours. If the payout were 37 to 1, the game would return everything it took, and no table would stay open.
The gap between the true odds of a bet winning and the payout the table offers is the house edge. For a straight-up bet on a European wheel, the true odds against you are 36 to 1, but the payout is 35 to 1. That one-unit difference, spread across every spin and every player, is what keeps the wheel turning. The same logic applies to every bet on the layout, which is why a payout table is really a map of how often each bet is expected to win.
The two wheels and why the extra pocket matters
Before you place a single chip, check which wheel you are playing. A European wheel has 37 pockets, numbered 0 through 36, with a single zero. An American wheel has 38 pockets, adding a double zero alongside the single zero. The payouts for the same named bets are identical on both wheels, but the extra pocket changes how often each bet wins, and therefore changes the house edge on every bet you make.
This is the single most important procedural check at the table, and it is easy to miss when you are focused on the layout. The wheel itself is the source of truth. If you see both a 0 and a 00, you are on an American wheel and every bet you place carries a larger built-in disadvantage than the same bet on a European wheel. The payout table does not change; your expected rate of loss does.
| Wheel type | Pockets | Zero pockets | Effect on payouts | Effect on house edge |
|---|---|---|---|---|
| European | 37 | One (0) | Same named payouts | Lower on every bet |
| American | 38 | Two (0 and 00) | Same named payouts | Higher on every bet |
The payouts themselves are fixed by the bet type, not the wheel. A straight-up bet pays 35 to 1 on both wheels. But on the American wheel, that bet wins once in 38 spins on average rather than once in 37, while still paying only 35 to 1. The missing unit goes to the house, and over a long session it compounds.
Inside bets: high payouts, low hit rates
Inside bets are the wagers placed on the numbered grid itself. They pay more because they win less often. The straight-up bet is the extreme case: one chip on one number, paid at 35 to 1. A split bet covers two adjacent numbers and pays 17 to 1. A street bet covers a row of three numbers and pays 11 to 1. The corner covers four numbers and pays 8 to 1. The six-line covers two adjacent rows, six numbers in total, and pays 5 to 1.
Each step up in coverage reduces the payout and increases the frequency of a win. That trade-off is the entire structure of roulette. A player who wants the rush of a large payout accepts a lower hit rate. A player who wants to see wins more often accepts a smaller payout. Neither choice changes the house edge on the individual bet, because the payout is always set one unit below the true odds on a European wheel, and two units below on an American wheel for the straight-up case.
| Bet name | Numbers covered | Payout | What the player gives up |
|---|---|---|---|
| Straight-up | 1 | 35 to 1 | Wins rarely; long losing stretches |
| Split | 2 | 17 to 1 | Still a low hit rate |
| Street | 3 | 11 to 1 | Moderate payout for moderate coverage |
| Corner | 4 | 8 to 1 | Lower payout, more frequent wins |
| Six-line | 6 | 5 to 1 | Smallest inside payout, best inside hit rate |
These payouts are fixed and printed on the layout or available in the game information panel for online play. You do not need to memorise them, but you should read them before betting, because the payout is the only part of the bet you can know in advance. The outcome of the spin is not.
Outside bets: lower payouts, higher hit rates
Outside bets sit around the numbered grid and cover larger groups of outcomes. Red or black covers 18 numbers and pays even money, 1 to 1. Odd or even covers 18 numbers and pays 1 to 1. High or low covers 1 through 18 or 19 through 36 and pays 1 to 1. A dozen bet covers 12 numbers and pays 2 to 1. A column bet covers one of the three vertical columns of 12 numbers and pays 2 to 1.
These bets win more often than inside bets, which is why they pay less. But the house edge is still present, and on an American wheel it is higher than on a European wheel for every outside bet as well. The zero and double zero are not red, not black, not odd, not even, not high and not low. When the ball lands in a zero pocket, the even-money outside bets lose on both wheel types, and that is where the house edge on those bets lives.
| Bet name | Numbers covered | Payout | Why it loses |
|---|---|---|---|
| Red or black | 18 | 1 to 1 | Zero pockets are neither colour |
| Odd or even | 18 | 1 to 1 | Zero pockets are not odd or even |
| High or low | 18 | 1 to 1 | Zero pockets sit outside both ranges |
| Dozen | 12 | 2 to 1 | Zero pockets belong to no dozen |
| Column | 12 | 2 to 1 | Zero pockets belong to no column |
Some European tables offer a rule variation called la partage or en prison, which changes what happens to an even-money bet when the ball lands on zero. Under la partage, half the stake is returned. Under en prison, the stake is held for the next spin. These rules reduce the house edge on the even-money outside bets specifically, but they apply only where the table rules state them, and they do not change the payouts on any other bet. Always check the table rules before assuming a zero behaves a particular way.
The sequence of a round, from buy-in to settlement
A roulette round moves faster than most new players expect, and knowing the sequence prevents the most common procedural mistakes. First, you buy in. You place cash on the table, never into the dealer's hand, and the dealer exchanges it for roulette chips. These chips are colour-coded to you and have no value away from the table. You must cash them in at the same table before you leave.
Second, you place bets while the layout is open. The dealer announces when betting closes, usually as the ball slows. Once the dealer calls no more bets, you cannot touch your chips. Third, the ball settles in a pocket and the dealer marks the winning number. Fourth, the dealer clears losing bets first, then pays winners. Do not reach for your winnings until the dealer has finished paying and pushed the chips toward you. Reaching early is the most common mistake at a live table, and it slows the game for everyone.
Fifth, the dealer removes the marker and opens betting for the next spin. Only then do you place new bets or collect your winnings. If you want to leave, tell the dealer you are colouring up. The dealer exchanges your coloured chips for standard value chips, which you then take to the cashier.
What the payout table cannot tell you
A payout table tells you what a winning bet pays. It does not tell you how likely that bet is to win, how long your bankroll will last, or what the next spin will do. Those are separate questions. The likelihood of winning is fixed by the wheel and the bet type. The length of your session is a function of your bet size, the pace of the game, and variance. The next spin is unknowable.
Variance is the reason two players can sit at the same table, make the same bets, and have completely different evenings. High-payout bets like straight-up numbers produce long stretches of nothing, then an occasional large win. Low-payout bets like red or black produce frequent small wins and frequent small losses. Neither pattern changes the house edge. The edge is built into the payout, and it applies on every spin, win or lose.
If you want to know the exact house edge for a specific bet on a specific wheel, the arithmetic is simple and you can do it at the table. For a European straight-up bet, the true odds against winning are 36 to 1, the payout is 35 to 1, and the difference is one unit in 37. For an American straight-up bet, the true odds are 37 to 1, the payout is 35 to 1, and the difference is two units in 38. The same method applies to every bet: compare the true odds from the wheel's pocket count to the payout on the layout, and the gap is the house edge.
FAQ
Does a straight-up bet pay the same on every roulette wheel?
The payout is the same, 35 to 1, on European and American wheels. What changes is how often the bet wins, because the American wheel has one extra pocket. The payout stays fixed while the true odds worsen, which is why the American wheel carries a higher house edge on that bet.
What is the best-paying bet on a roulette table?
The straight-up bet pays the most per win at 35 to 1, but it also wins the least often. A high payout is not a better bet; it is a bet that concentrates the same house edge into rarer, larger swings. The right bet depends on what kind of session you want, not on which payout is highest.
Can I use a betting system to change what roulette bets pay?
No. A progression system changes how much you stake on each spin, not what the table pays for a winning bet. The payout for a red bet is 1 to 1 whether you bet one unit or one hundred. Systems redistribute outcomes across a session; they do not alter the built-in edge on any bet.
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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.