Inside and outside roulette bets: a plain-language guide
Roulette is a casino game in which a ball settles in one of the numbered pockets on a wheel. A winning number, colour or grouping determines the result of a wager. The layout divides wagers into two families: inside bets sit within the numbered grid, while outside bets cover broader sets. The labels describe chip placement and risk, not whether a wager is “good” or “bad”.
Australian players may encounter roulette at licensed land casinos such as Crown Melbourne or The Star Sydney, while many social clubs focus on pokies. In Australian speech, placing a wager is often described as having a punt. The same roulette vocabulary appears on international websites, although access, rules and legal protections can differ.
What separates inside and outside bets
A standard layout displays 1–36 in three columns, with one zero on a European or French wheel and an additional 00 on an American wheel. A chip on a number, line or intersection marks an inside bet. Wagers covering colour, parity, half the wheel or a group of numbers are outside bets.
Neither family changes the random outcome of a spin. An inside wager covers fewer numbers, so it loses more often but can pay a larger profit. An outside wager covers more numbers, so it wins more frequently but generally returns less. A red wager wins on 18 of 37 pockets on a single-zero wheel and pays even money; a straight-up wager wins on one pocket and pays 35 to one.
Common inside bets and chip positions
A straight-up bet covers one number and usually pays 35:1. A split covers two adjoining numbers, including a zero joined to an adjacent number, and pays 17:1. A street covers the three numbers in one horizontal row and pays 11:1. Placing the chip on the relevant line or at the end of a street determines the selection.
A corner bet places the chip where four numbers meet and covers all four, paying 8:1. A six-line bet covers two adjoining streets, or six numbers, and pays 5:1. Grid neighbours are related only by layout; their results are no more predictable than any other number. A trio covers 0, 1, 2 or 0, 2, 3 and generally pays 11:1. On an American wheel, the five-number basket covers 0, 00, 1, 2 and 3 and pays 6:1.
Outside bets and even-money wagers
Red, black, odd, even, high and low are the classic even-money bets. Each covers 18 numbers on a single-zero wheel and pays 1:1. On an American wheel, each covers 18 of 38 pockets because both zero and double zero are losing numbers for these bets.
A dozen bet covers any group of 12 numbers, such as 1–12, and pays 2:1. A column bet covers one vertical column of 12 numbers and also pays 2:1. These wagers sit beyond the numbered grid, which places them in the outside family. The figures below use a single-zero wheel and show profit odds:
| Bet | Numbers covered | Profit odds | House edge |
|---|---|---|---|
| Straight up | 1 | 35:1 | 2.70% |
| Split | 2 | 17:1 | 2.70% |
| Street | 3 | 11:1 | 2.70% |
| Corner | 4 | 8:1 | 2.70% |
| Six line | 6 | 5:1 | 2.70% |
| Red or black | 18 | 1:1 | 2.70% |
| Odd or even | 18 | 1:1 | 2.70% |
| High or low | 18 | 1:1 | 2.70% |
| Dozen | 12 | 2:1 | 2.70% |
| Column | 12 | 2:1 | 2.70% |
On a double-zero wheel, standard winning selections become less likely while listed payouts remain unchanged, raising the house edge. This affects every regular inside and outside wager, including those involving zero.
Payouts, odds and stake sizing
A payout expresses profit earned on a winning stake, not the total returned. If a $10 split wins at 17:1, the operator returns $170 profit plus the $10 stake; if it misses, the stake is lost. This makes bankroll planning clearer than focusing only on the largest advertised return.
On a 37-number wheel, a straight-up selection has a probability of 1 in 37, yet its 35:1 payout values that outcome as if there were 36 winning numbers. The difference creates a 2.70% house edge on standard wagers. The American two-zero wheel produces a 5.26% edge on those same wagers; French rules with en prison or la partage can reduce the effective edge on some even-money wagers.
Stake size should be set before a session and expressed in a fixed unit, such as $5 or $10. Increasing a stake to recover a previous loss is a Martingale-style approach and can require rapid, substantial funds. No progression changes the mathematical edge, and a long sequence can still exceed a short budget. Limits based on time and money are more useful than predictions about the next spin.
How online roulette formats differ
Software-based roulette uses a random number generator, while live-dealer games stream a physical wheel and ball. Multiplayer layouts may add social features and side wagers with different rules. Demo modes can teach chip positions, but simulated balance has no cash value and cannot show which real-money game will behave better.
Before any real-money selection, check the wheel version, minimum and maximum stakes, payout schedule and treatment of zero. A game called roulette may use one zero, two zeroes or an unusual house rule. The visible betting interface should also make covered numbers clear. Where a regulated local market is unavailable, an offshore operator’s licence and independent game-testing claims deserve separate verification.
Payment choices affect deposits, withdrawals, currency conversion and identity checks. Australian readers often think in Australian dollars and may recognise PayID or POLi from everyday payments, though availability for overseas roulette services varies. In the Hungarian market, for example, this overview of Klarna payment options shows how a familiar payment brand can appear at checkout. A payment logo alone does not establish licensing, fairness or a smooth withdrawal process.
Australian context and responsible gambling
Australia’s Interactive Gambling Act 2001 generally prohibits providers from offering prohibited interactive gambling services to residents, while lotteries and betting services sit under separate arrangements. State and territory regulators oversee local rules. An offshore website displaying roulette is not equivalent to a licensed Australian casino, and it should not be treated as a lawful local offering merely because it accepts a card or bank transfer.
Responsible play is particularly important with roulette because rapid bets and near-even wagers can make time and spending harder to notice. Set a deposit limit, a loss limit and a session reminder before play begins. Do not borrow, chase losses or use essential household money, and take a break after a preset period. Online balance displays can also create a false sense of the cash already spent.
Support is available in Australia through the national Gambling Helpline on 1800 858 858, with free confidential help 24 hours a day. Early warning signs include hiding spending, borrowing, chasing losses and neglecting other activities. Roulette can remain a chance-based entertainment choice for eligible adults, but the house edge and personal limits should govern participation rather than hopes of beating a system.