The Layout You See When You Step Up to the Wheel
Walk up to any roulette table and the first thing you will notice is a long felt layout covered in numbers, with a wheel at one end. The numbered area in the middle is where the riskier, higher-paying bets live. Around that numbered grid, printed along the outer edges, sits a second set of betting spaces. Those outer spaces are what players and dealers mean when they say the outside of the table. They are not physically outside the table; they are outside the number grid.
Outside bets exist because roulette offers two very different ways to play. The inside bets pick specific numbers or tiny groups of them and pay large multiples when they hit. The outside bets cover broad categories of outcomes, so they win more often but pay less per win. A player can bet only outside, only inside, or mix both on the same spin. The distinction matters because the house edge, the payout, and the rhythm of winning and losing all change depending on which side of the layout your chips are on.
Which Bets Count as Outside Bets
Every outside bet is defined by a category rather than a specific number. The table below lists the standard outside bets, what they cover, and how they pay on a European wheel with 37 pockets.
| Bet | What it covers | Payout |
|---|---|---|
| Red or black | All 18 pockets of one colour | 1 to 1 |
| Odd or even | All 18 odd or all 18 even numbers | 1 to 1 |
| Low or high | 1-18 or 19-36 | 1 to 1 |
| Dozen | 1-12, 13-24, or 25-36 | 2 to 1 |
| Column | All 12 numbers in one vertical column of the grid | 2 to 1 |
The even-money bets are red or black, odd or even, and low or high. They pay 1 to 1, meaning a winning wager returns the original stake plus an equal amount in profit. The dozen and column bets pay 2 to 1, so a win returns the stake plus twice that amount. On a European wheel, none of these bets covers the zero. When the ball lands in the zero pocket, every outside bet loses unless the table uses a rule that returns part of the stake, which is a separate feature some venues offer and is printed on the table if it applies.
How the Wheel Type Changes the Outside
The outside betting spaces look almost identical on every table, but the wheel behind them can differ in one important way. A European wheel has 37 pockets: the numbers 0 through 36, with a single zero. An American wheel has 38 pockets: the same numbers plus a double zero. The extra pocket changes the arithmetic for every outside bet, because the categories you are betting on do not grow to include it.
Take red or black as an example. On a European wheel, 18 of the 37 pockets are red, 18 are black, and the zero is green. The bet pays 1 to 1, but it does not win on 37 of the 37 possible outcomes. It wins on 18 and loses on 19. That gap between the payout and the true odds is the house edge. On an American wheel, the same bet still wins on 18 pockets but now loses on 20, because both zero pockets sit outside the colour categories. The house edge on the outside bets is therefore higher on the American layout, even though the printed payouts are identical.
What You Do at the Table
A round of roulette follows a fixed sequence, and outside bets fit into it like any other wager. First you buy in: you place cash on the table and the dealer exchanges it for roulette chips. These chips have no value printed on them and are used only at that table. The dealer assigns each player a chip colour or value so that bets can be told apart when they land on the same spot.
Once the dealer clears the previous spin and announces that bets are open, you place chips on the outside area you want. Outside bets usually have a lower minimum than inside bets, and the minimum is posted on a sign at the table. You may place outside bets until the dealer calls for no more bets, which typically happens as the ball begins to slow. When the ball settles, the dealer marks the winning number, clears all losing bets, and pays winners from the outside inward. Your chips stay on the table until you decide to leave, at which point the dealer converts them back into standard casino chips.
Decision Points and What They Mean
Roulette looks passive compared with a game like blackjack, but you still make several decisions on every spin. The first is whether to bet outside, inside, or both. Outside bets win more often because they cover many numbers at once. The trade-off is that the payout is smaller, so a single win does not recover several previous losses. Inside bets are the mirror image: they win rarely, pay more, and produce longer dry spells.
The second decision is which outside category to choose. All the even-money bets carry the same house edge on a given wheel, so none of them is mathematically better than the others. A dozen bet and a column bet also carry the same edge as each other, but a different edge from the even-money bets. The choice between them is a choice about how often you want to win relative to how much each win pays, not a way to change the long-run rate of loss.
The third decision is stake size, and it is the one most players treat too casually. Because outside bets win frequently, it is easy to raise the stake after a few wins and give back the session's gains in a single losing spin. Setting a fixed amount per spin, or at least a fixed range, keeps the session's pace under control. No staking pattern changes the house edge; it only changes how the bankroll is distributed across the spins you play.
Where the Edge Sits on Each Bet
Roulette is a negative-expectation game, which means the house keeps a mathematical advantage on every bet. The size of that advantage depends on the bet and the wheel. The comparison below assumes a European wheel unless stated otherwise.
| Bet type | Winning pockets on a European wheel | Payout | What the payout implies |
|---|---|---|---|
| Even-money outside bet | 18 of 37 | 1 to 1 | You win less often than the payout suggests, because the zero is uncovered |
| Dozen or column | 12 of 37 | 2 to 1 | The payout matches 12 winning numbers against 25 losing ones, leaving the same structural gap |
| Single number inside bet | 1 of 37 | 35 to 1 | The payout is below the 36 to 1 that a 37-pocket wheel would imply |
Every bet on the table is built the same way: the payout is slightly short of what the true odds would require, and that shortfall is the house edge. On an American wheel, the shortfall grows for every bet because the double zero adds a losing pocket without adding any winning ones. When a table displays a rule like a part-refund on even-money bets when zero hits, that rule reduces the edge on those specific bets, and the exact terms are printed on the table or in the venue's game rules.
Mistakes That Cost New Players More Than the Edge
The first procedural mistake is placing a chip on the line between two outside betting spaces without realising it. Roulette chips are small and the outside boxes sit close together. A chip that straddles two categories may be ruled to cover only one of them, or the dealer may ask you to clarify before the spin. The fix is simple: place the chip fully inside the box you intend, and watch where the dealer's marker lands if there is any doubt.
The second mistake is assuming that a colour or a range is due because it has not appeared for several spins. Each spin is independent. The wheel has no memory, and the odds of red on the next spin are the same whether red has just appeared ten times or not at all. Chasing a category because it feels overdue does not change the edge; it just concentrates your session on a belief the wheel cannot honour.
The third mistake is buying in with more than you intend to risk and leaving the chips in play because they no longer feel like real money. Roulette chips are deliberately abstract, and outside bets make it easy to place many small wagers in a short time. Decide on a session amount before you buy in, and convert the chips back when you reach your own stopping point rather than when the table closes.
FAQ
Is the zero an outside bet?
No. The zero sits inside the numbered grid and is bet as a single number or as part of a small group, which makes it an inside bet. Outside bets cover categories like colours, odd or even, and ranges, and on a standard wheel the zero falls outside all of those categories, which is why outside bets lose when it lands.
Can I bet on both the inside and the outside in the same spin?
Yes. The two areas are independent, so you can place an even-money bet on red and a straight-up bet on a single number in the same round. Each wager settles on its own terms, and a spin can win on one, both, or neither.
Do all tables have the same outside betting minimum?
No. The minimum for outside bets is set by the venue and is posted at the table, usually on a small sign near the wheel. Some tables set the outside minimum higher than the inside minimum, while others set a single minimum for the whole layout, so check the posted sign before you buy in.
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