The situation behind the question
You are standing at a roulette table, looking at the printed layout, and somewhere on it you have seen a marker, a sign, or a payout notice that reads 1:1. The question is not really about the notation. It is about what happens to your chips if you put them in one of those boxes and the ball lands the right way.
1:1 is a payout ratio. It means that for every unit you wager, you receive one unit of profit if the bet wins. Your original stake is then returned to you along with that profit. If you place a 10-unit chip on a bet that pays 1:1 and it wins, you keep your 10-unit stake and receive 10 units in winnings, so 20 units come back across the table. A losing spin simply takes the stake.
On a roulette layout, the bets that pay 1:1 are the outside bets that split the wheel into two large groups. They are sometimes called even-money bets, not because they win half the time, but because the profit equals the stake when they do win.
Which roulette bets pay 1:1
Three pairs of outside bets carry the 1:1 payout. Each pair covers a different way of dividing the numbers on the wheel, and each pays the same flat rate.
| Bet | What it covers | Payout | Where it sits on the layout |
|---|---|---|---|
| Red or black | All 18 red numbers, or all 18 black numbers | 1:1 | The red and black diamonds at the side of the number grid |
| Odd or even | All 18 odd numbers, or all 18 even numbers | 1:1 | The boxes marked odd and even |
| Low or high | 1 through 18, or 19 through 36 | 1:1 | The boxes marked 1-18 and 19-36 |
Zero is the number that breaks the symmetry. On a European wheel, the single zero belongs to none of these groups: it is not red, not black, not odd, not even, not low and not high. On an American wheel the zero and the double zero are both outside the even-money groups. When a zero lands, every 1:1 bet loses unless the table uses a rule that returns part of the stake, which is a variant of the game rather than a standard feature.
Why the payout is written as a ratio
Roulette payouts are expressed as ratios because they describe the relationship between stake and profit, not the total amount returned. A 1:1 bet returns profit equal to the stake. A 35:1 bet on a single number returns 35 units of profit for every unit staked, plus the original unit. A 2:1 bet on a column or a dozen returns two units of profit for every unit staked.
The ratio is not the same thing as the chance of winning. A single number pays 35:1, but there are 37 or 38 pockets depending on the wheel. The gap between the payout ratio and the true odds of the event is where the house edge lives. The even-money bets pay 1:1, but they do not win on half of all spins because the zero pockets sit outside the covered groups.
How the 1:1 bets compare with the rest of the table
Different bets on the same roulette table carry materially different house edges. The even-money bets are generally among the lower-edge wagers on the layout, but they are not equal to each other across wheel types, and they are not the only bets worth understanding before you sit down.
| Bet type | Typical payout | What the payout ratio means | How the edge behaves |
|---|---|---|---|
| Even-money outside bets | 1:1 | Profit equals stake | Lower edge than most inside bets; still loses to the zero pockets |
| Column or dozen | 2:1 | Two units of profit per unit staked | Higher edge than even-money bets on the same wheel |
| Six-line | 5:1 | Five units of profit per unit staked | Higher again; covers six numbers |
| Single number | 35:1 | Thirty-five units of profit per unit staked | Highest payout, but the payout is far below the true odds of hitting one pocket |
The table above describes the relationship between payout and edge, not a promise about any session. A single number can win on the first spin and an even-money bet can lose ten times in a row. The edge is a long-run statistical property, and the short run is noisy.
The European and American difference
Roulette wheels come in two common layouts, and the difference matters most on the 1:1 bets. A European wheel has 37 pockets: the numbers 1 through 36 plus a single zero. An American wheel has 38 pockets: the same numbers plus a zero and a double zero.
The extra pocket increases the house edge on the American layout. For an even-money bet, the player covers 18 of the 37 pockets on a European wheel, and 18 of the 38 on an American wheel. The additional zero pocket does not change the payout, which remains 1:1, so the same stake and the same win return a profit that is unchanged while the chance of the bet losing to a zero is larger. The wheel type is printed on the layout or shown on the table sign, and it is worth checking before you buy in because it changes the edge on every bet you place, not just the even-money ones.
What a round looks like from buy-in to settlement
The sequence of a roulette round is the same whether you are betting 1:1 or on a single number. Understanding the order of events prevents the procedural mistakes that cost new players chips or time.
You buy in by placing 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 at a live table, which is how the dealer knows which stack belongs to which player. When the dealer opens betting, you place your chips on the layout. A 1:1 bet goes in one of the outside boxes: red, black, odd, even, low, or high. The dealer spins the wheel and launches the ball, then calls for final bets. No bets may be placed or changed after that call. When the ball settles, the dealer marks the winning number, clears the losing bets, and pays the winners. Your 1:1 win is paid as profit chips placed next to your original stake, and you pick up both when you are ready.
Procedural mistakes new players make on the even-money bets
Most errors at a roulette table are not about strategy. They are about where chips go, when they go there, and what happens when a zero lands.
The first mistake is placing an even-money bet after the dealer has called for final bets. The call is not a suggestion. A late bet is returned to you, and if the ball has already settled the bet is void. The second mistake is assuming a zero is covered by an even-money bet. It is not, unless the table operates a specific rule variant that returns part of the stake on a zero, and that variant is printed on the table rules. The third mistake is confusing the payout ratio with the total return. A winning 1:1 bet returns your stake plus an equal amount of profit. If you hand over a 10-unit chip and only 10 units come back, that is your stake being returned, not a win. The profit arrives as a second stack.
What the payout does and does not tell you
The 1:1 notation tells you exactly one thing: the profit on a winning bet equals the stake. It does not tell you the chance of winning, the house edge, the volatility of the bet, or whether the table is a good place to sit. Those properties come from the wheel type, the table rules, and the choices you make about which bets to place and how long to play.
No betting pattern changes the built-in edge on a roulette wheel. Doubling an even-money bet after a loss, alternating between red and black, or waiting for a colour to appear several times in a row does not alter the probability of the next spin. The wheel has no memory, and each spin is independent. The even-money bets are a lower-edge choice than most inside bets, but they remain negative-expectation wagers because the zero pockets are always working against the player.
FAQ
Does 1:1 mean I double my money on a winning roulette bet?
Your profit doubles, not your total return. A winning 1:1 bet pays one unit of profit for every unit staked, and your original stake is returned alongside it. A 10-unit bet that wins brings back 20 units in total: 10 of profit and 10 of stake.
Are red and black the only 1:1 bets in roulette?
No. Odd, even, low and high also pay 1:1. All six of these outside bets split the numbers into two groups of 18, and all six lose when a zero or double zero lands unless the table rules include a special zero provision.
Why does the same 1:1 bet feel different on an American wheel?
Because the double zero adds an extra pocket that is outside every even-money group. The payout stays at 1:1, but the bet covers a smaller share of the wheel, so the house edge is higher on the American layout than on a European wheel for the same wager.
Gambling involves risk. Please only gamble with funds that you can comfortably afford to lose. While we do our best to provide good quality information, we do not provide any warranties regarding the accuracy, completeness, or reliability of any content. We are not liable for any loss or damage arising from the use of or reliance on this information, and we do not guarantee the accuracy of any information presented. Gambling may be addictive; if you or someone you know is struggling with gambling addiction, seek help from a professional or a support group. Please play responsibly.
Play responsibly
Gambling should be treated as paid entertainment, never as a way to earn income or recover losses. 1-800-MY-RESET (1-800-697-3738)
18+ or 21+ depending on where you are; follow the minimum age that applies to you.
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.