The bet that pays the most and wins the least
A single-number bet is the most direct wager on a roulette layout. You are choosing one pocket out of the wheel and saying that the ball will land there. If it does, the payout is the largest on the table. If it does not, the chip is gone. Most of the confusion around this bet comes from mixing up those two facts: the payout is large because the probability is small, and neither number changes no matter how you pick the number.
You will hear this bet called a straight-up bet or a straight bet. On the layout it is placed directly on the number, not on any line or corner. The chip sits fully inside the numbered box. That placement is what makes it a single-number wager rather than a split, street, or corner bet.
Before you play, know which wheel you are at. A European wheel has 37 pockets: the numbers 0 through 36. An American wheel has 38, adding a double zero. The extra pocket changes the arithmetic on every bet, including this one.
What you are choosing
When you pick a single number, you are not picking a likelihood. Every number on a fair wheel has the same chance on every spin. The ball has no memory, the wheel has no pattern it owes you, and a number that has not appeared in an hour is not more likely to appear on the next spin. What you are choosing is only which pocket you want to be paid on.
The payout for a single-number bet is fixed by the table rules and printed on the layout or the table placard. On most tables it is 35 to 1, meaning a winning unit returns the original unit plus 35 more. The house edge comes from the gap between that payout and the true odds of the wheel. On a European wheel, the true odds against any single number are 36 to 1, because there are 36 losing pockets against one winner. On an American wheel they are 37 to 1. The payout stays at 35 to 1 on both wheels, which is why the American layout holds a larger edge on the same bet.
| Wheel type | Pockets | True odds against a single number | Typical payout | Effect on the bet |
|---|---|---|---|---|
| European | 37 | 36 to 1 | 35 to 1 | Smaller house edge |
| American | 38 | 37 to 1 | 35 to 1 | Larger house edge |
The payout ratio itself is a table rule, not a law of mathematics. Some tables, especially on electronic terminals or special variants, may post a different payout. Read the placard before you buy in, because the payout is the single most important number on the table for this bet.
The sequence of a round
A round of roulette moves faster than most new players expect. Knowing the order of events keeps you from placing a bet too late or touching chips after the call.
You buy in at the table by placing cash on the layout, never directly into the dealer's hand at most venues. The dealer exchanges it for roulette chips. These chips are usually a colour unique to you at that table, so the dealer can tell your bets apart from everyone else's. They have no cash value away from that table and must be exchanged back for regular chips before you leave.
Once you have chips, you place them on the layout while betting is open. For a single-number bet, the chip goes fully inside the numbered box. Do not let it touch a line. A chip touching a line may be read as a different bet, such as a split covering two numbers, and the dealer will not always ask before paying it that way.
The dealer then calls an end to betting, usually with a phrase like "no more bets," and spins the wheel and the ball. From that moment you cannot touch your chips. When the ball settles, the dealer marks the winning number, clears losing bets, and pays winners. A winning single-number bet is paid at the posted odds, and your original chip stays on the number until you remove it.
After the payout, betting opens again for the next spin. If you want the same number to ride, you leave the chip in place. If you want to change numbers, you move it before the next call.
How this bet compares to the rest of the layout
The single-number bet is one of the inside bets, the wagers placed on the numbered grid itself. The outside bets sit around the grid and cover larger groups: red or black, odd or even, high or low, dozens, and columns. The trade-off across the whole layout is consistent: larger coverage means a smaller payout and a different rate of expected loss.
| Bet | Coverage on a European wheel | Typical payout | What the player accepts |
|---|---|---|---|
| Single number | 1 pocket | 35 to 1 | Rare wins, largest single payout |
| Split (two numbers) | 2 pockets | 17 to 1 | More frequent wins, smaller payout |
| Street (three numbers) | 3 pockets | 11 to 1 | Broader coverage, smaller payout |
| Corner (four numbers) | 4 pockets | 8 to 1 | Broader still, smaller payout |
| Red or black | 18 pockets | 1 to 1 | Frequent wins, payout equal to stake |
On a European wheel, the house edge is the same on a single number as it is on red or black, because the payout is short by the same proportion on both. On an American wheel, the double zero raises the edge on every bet, but the single-number bet still shares the same edge as the outside bets on that wheel. The difference between bets is not which one is safer; it is how the losses and wins are distributed over time. A single-number bet produces long dry spells and occasional large payouts. An outside bet produces frequent small results. Neither changes the built-in edge.
Three procedural mistakes that cost new players
The first mistake is placing the chip so it touches a line. A chip that overlaps two numbers becomes a split bet, and a chip that sits on a corner may cover four numbers. The dealer will pay it according to where it sits, not according to what you meant. If you want one number, put the chip in the centre of the box.
The second mistake is betting after the call. Once the dealer announces no more bets, any chip that lands on the layout is late. Late bets are returned or refused, and in some venues a repeated late bet will get you a warning. The call is the boundary of the round.
The third mistake is treating a colour chip as cash. Roulette chips are table-specific. If you walk away from the table with them, they cannot be redeemed at the cashier. Exchange them for value chips at the table before you leave, and do it while the table is open.
What changes from table to table
Three things vary by venue and by table, and all three are printed or displayed where you can read them before you buy in. The first is the wheel type, which tells you whether the double zero is in play. The second is the payout ratio, which is normally 35 to 1 but is always posted. The third is the table minimum and maximum for inside bets. A single-number bet must meet the inside minimum, and the maximum is usually lower than the outside maximum because the payout is larger.
Some tables also post a rule about what happens when the ball lands on zero. On many European layouts, outside bets lose to the zero outright. On some tables, a rule called la partage or en prison returns half the outside bet or holds it for the next spin. That rule affects outside bets, not a straight-up bet on zero itself. If you are playing a single number, the zero is just another pocket unless your number is zero.
Electronic roulette terminals and live-dealer studio games follow the same bet structure but handle chips and timing differently. On a terminal, you select the chip value on screen and tap the number. In a live studio, you place bets through an interface while a real wheel spins on camera. The payout and the wheel type are still displayed on the screen, and the same no-more-bets boundary applies.
FAQ
Is there a better way to pick which single number to bet?
No. Every number on a fair wheel has the same probability on every spin, so no selection method changes the expected outcome. What you can control is which wheel you play, what the posted payout is, and how long you stay at the table.
Does a single-number bet pay more on an American wheel?
Usually not. The posted payout is normally 35 to 1 on both wheel types. The American wheel adds a pocket without increasing the payout, which widens the gap between the true odds and what the table pays.
Can I bet the same number for someone else at the table?
That depends on the table rules and the dealer. Some venues allow a player to place a bet on behalf of another person only if the person is present and the dealer acknowledges it. The safer procedure is to have each player buy in and place their own chips, because a disputed payout on a shared bet is resolved by the dealer's reading of the layout, not by a private agreement.
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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.