The Layout Tells You Where the Money Goes
Walk up to a roulette table and the first thing you notice is that the betting area splits into two zones. The inner zone is a grid of individual numbers. The outer zone, running around that grid, holds boxes labelled for groups of numbers: red, black, odd, even, low, high, and the three blocks marked 1st 12, 2nd 12 and 3rd 12. A wager placed on any of those outer boxes is an outside bet.
The name has nothing to do with the roulette wheel itself. It refers only to where the chip sits on the printed layout. The wheel does not care where you placed the chip; it simply stops on a pocket. What changes between an inside and an outside bet is how many pockets count as a win for you, how much the table pays when that happens, and how often you can expect to collect.
Outside bets cover large groups of pockets in a single wager. A red bet wins on 18 of the 37 pockets on a European wheel, and on 18 of the 38 pockets on an American wheel. That breadth is the trade-off: you win more often than someone betting a single number, but the payout is much smaller.
The Six Standard Outside Bets
Every roulette table, whether physical or online, offers the same core set of outside wagers. They divide into two families: the even-money bets, which pay 1 to 1, and the dozen and column bets, which pay 2 to 1.
The even-money bets are the ones most players learn first. Red or black covers every pocket of that colour. Odd or even covers every number of that parity. Low covers 1 through 18, and high covers 19 through 36. On both European and American wheels, the zero pockets sit outside all six of these categories. A zero landing means every even-money outside bet loses on a European table, and on an American table both zero and double zero defeat them.
The dozen and column bets cover twelve numbers each. The three dozen boxes sit along one edge of the layout and divide the numbers into 1-12, 13-24 and 25-36. The three column boxes sit at the foot of the number grid, each covering a vertical line of twelve numbers. A column bet wins if the ball lands on any number in that column.
| Outside bet | Pockets covered | Payout | What defeats it |
|---|---|---|---|
| Red or black | 18 | 1 to 1 | The opposite colour plus zero pockets |
| Odd or even | 18 | 1 to 1 | The opposite parity plus zero pockets |
| Low (1-18) or high (19-36) | 18 | 1 to 1 | The opposite half plus zero pockets |
| Dozen (1st, 2nd or 3rd 12) | 12 | 2 to 1 | Any number outside that block, including zero pockets |
| Column (three columns of 12) | 12 | 2 to 1 | Any number outside that column, including zero pockets |
One detail trips up new players on American wheels. The zero and double zero sit at the top of the number grid, above the columns. They are not part of any column and not part of any dozen. On some layouts the zeros are coloured green, which makes them visually distinct from the red and black bets, but their exclusion from the dozen and column boxes is just as complete.
What a Round Looks Like from Buy-In to Settlement
The sequence of a roulette round is the same whether you are betting outside or inside. You buy in at the table by placing cash on the layout; the dealer exchanges it for roulette chips. Those chips carry no printed value, so the dealer assigns them a value for your session and marks it. Online, the cashier screen handles this step and the software tracks your balance instead.
Once betting opens, you place chips on the boxes you want. Outside bets have table minimums, and on most tables the minimum for an outside bet is the table minimum printed on the sign. You may place an outside bet at any point while betting is open, and you may combine outside and inside bets in the same round if the table allows it.
The dealer spins the wheel and launches the ball in the opposite direction. When the ball drops into a pocket, the dealer marks the winning number, collects losing wagers first, and then pays winning bets. An outside bet that wins is paid at its printed odds; an outside bet that loses is simply swept away. The next round begins when the dealer clears the layout and announces that betting is open again.
There is no decision point during the spin. Outside bets are settled entirely by where the ball lands. The only decisions you make are which outside bet to place, how much to stake, and whether to keep the bet on the table for the next round or change it.
Why the Zero Pockets Matter More Than the Payout
The payout on an outside bet looks close to the true odds, and that closeness is exactly where the house edge hides. A red bet pays 1 to 1, which sounds like a coin flip. But the wheel is not a coin. On a European wheel, red covers 18 pockets while 19 pockets defeat it: 18 black numbers plus the single zero. The payout is even money, but the chance of winning is slightly less than half. That small gap between the payout and the true odds is the house edge, and it applies to every outside bet on every spin.
On an American wheel the gap widens, because the double zero adds one more pocket that defeats every even-money outside bet without changing the payout. The same logic applies to the dozen and column bets: they pay 2 to 1, which matches the true odds of twelve winning pockets against twenty-four losing ones, but the zero pockets add extra losing outcomes on top.
This does not mean outside bets are a bad choice. It means the cost of playing is built into the structure of the wheel, not into the choice of bet. An outside bet loses at a slower average rate than many inside bets because the edge is smaller, but it is still a negative-expectation wager. No placement pattern, no alternating of colours, and no doubling after a loss changes the number of pockets that defeat your bet.
Outside Bets Versus Inside Bets
The practical difference between the two zones is the shape of the session they produce. An outside bet wins often and pays small. An inside bet wins rarely and pays large. Neither is inherently better; they produce different rhythms and different bankroll demands.
| Characteristic | Outside bets | Inside bets |
|---|---|---|
| Pockets covered per wager | 12 or 18 | 1 to 6, depending on the bet |
| Typical payout | 1 to 1 or 2 to 1 | 5 to 1 up to 35 to 1 |
| Win frequency | Higher | Lower |
| Session feel | Frequent small results | Long dry spells punctuated by larger hits |
| House edge | Lower on the standard bets | Varies by bet; the five-number bet on an American wheel carries a higher edge |
A player who wants a long session with many small outcomes tends to prefer outside bets. A player who wants the possibility of a large single payout tends to prefer inside bets. Many players combine the two, placing an outside bet as a base and a smaller inside bet as a speculative addition. The table minimums and your own session budget determine whether that combination is practical.
Procedural Mistakes That Cost New Players
The first mistake is assuming that an even-money bet is a fair coin flip. It is not, because the zero pockets sit outside the bet. The player who believes red and black are equally likely is misreading the wheel. The payout is even money; the probability is not.
The second mistake is misreading the table minimum. On many tables, the minimum printed on the sign applies to each outside bet individually, not to the total of all your outside bets. A player who spreads chips across three outside boxes may be committing three times the table minimum without realising it. The dealer can clarify the rule at the table, and the cashier screen shows the total stake online before you confirm the spin.
The third mistake is chasing a colour or a half that has not appeared for several spins. Each spin is independent. The wheel has no memory, and a run of black results does not make red more likely on the next spin. The number of red pockets on the wheel is fixed, and it does not change because of what happened in previous rounds. A player who increases an outside bet after a losing streak is staking more money on the same fixed probability, not on an improved chance.
How to Read the Table Before You Sit Down
Every table carries the information you need to bet correctly. The printed layout shows which boxes are outside bets and which are inside bets. The table sign shows the minimum and maximum for outside wagers. The wheel itself tells you whether it is European or American: count the zero pockets. One zero means 37 pockets; two zeros means 38. That single observation changes the house edge on every outside bet you place, so it is worth doing before you buy in.
Online, the game information panel carries the same details. The paytable lists the payout for each outside bet. The rules page states the wheel type. The bet selector shows the minimum stake for the bet you are about to place. Reading those three things before the first spin prevents most of the procedural errors new players make.
No strategy chart is needed for outside bets, because there is no decision to make during the spin. The only choices are which bet to place and how much to stake. A published strategy for roulette, where one exists, derives from the exact wheel type and rule set in use, and it cannot change the fixed number of pockets that defeat any given wager. The best preparation is to know the layout, know the payouts, and know that the zero pockets are always working against you.
FAQ
Is a dozen bet an outside bet?
Yes. The three dozen boxes sit in the outer section of the layout and cover twelve numbers each. They pay 2 to 1 and are grouped with the column bets as the non-even-money outside wagers.
Do outside bets have better odds than inside bets?
The standard outside bets carry a lower house edge than most inside bets, because the payout is closer to the true odds of the group covered. That means a slower expected rate of loss, not a better chance of finishing ahead. The house edge is still present on every outside bet, every spin.
Can I place an outside bet and an inside bet in the same round?
On most tables, yes. The two zones are separate betting areas, and a player may place chips in both during the same betting window. Each wager is settled independently according to its own payout, and each is subject to the table minimum that applies to it.
Gambling can be addictive. Please play responsibly. If you or someone you know is struggling with gambling addiction, call the National Problem Gambling Helpline at the helpline printed in the footer below.
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.