The moment that decides your roulette session
You sit down, exchange cash for coloured chips, and the layout in front of you is covered in numbered boxes. The inside section is the grid of individual numbers from 0 to 36 and the shared lines between them. Everything you place there is an inside bet, and every inside bet is a wager on exactly which pocket the ball will land in, or on a small cluster of pockets. The outside section—red or black, odd or even, high or low, columns and dozens—is a different set of wagers with different probabilities. This article covers the inside grid only.
Before you put a chip down, know that the wheel type changes the arithmetic on every single inside bet. A European wheel has 37 pockets and a single zero. An American wheel has 38 pockets, adding a double zero. That extra pocket increases the house edge on the American layout. The payout for a winning straight-up bet is the same on both wheels, but the probability of hitting it is not.
What an inside bet is
An inside bet is any wager placed on the numbered part of the layout rather than on the surrounding boxes. You are betting on one number or a small group of adjacent numbers. The fewer numbers you cover, the larger the payout when one of them hits, and the rarer that event is. The more numbers you cover, the smaller the payout and the more often you collect something.
The main inside bets, in order of how many numbers they cover:
- Straight up: a single number. The chip sits entirely inside one numbered box.
- Split: two adjacent numbers. The chip straddles the line between them, either horizontally or vertically.
- Street: three numbers in a horizontal row. The chip sits on the outer edge of the row.
- Corner, also called square: four numbers that meet at a shared corner. The chip sits on that intersection.
- Six line, also called double street: two adjacent rows, six numbers total. The chip sits on the outer corner where the two rows meet.
There are also smaller variations. A trio covers three numbers including the zero, and a basket on an American wheel covers 0, 00, 1, 2 and 3. Not every table offers every variant, and the table layout itself shows where each chip may be placed.
How a round runs, step by step
The sequence is the same whether you are at a physical table or playing a live-dealer version on a screen. First, the dealer or the software opens the betting window. You place your inside bets by putting chips on the layout, or by tapping the relevant positions on the digital grid. You can spread chips across several inside bets, and you can mix inside and outside bets in the same round.
When the betting window closes, the ball is released and the wheel spins. No further chips may be placed or moved. The ball loses speed, drops into a pocket, and the winning number is announced. The dealer marks the number on the layout, clears all losing chips, and pays winning bets at the table's posted odds. In a digital game, the software does the same instantly and credits your balance.
Your chips remain yours until the ball drops. If you want to change a bet before the window closes, you move it. After the result, losing chips are gone and winning bets are paid. The next round begins with a new betting window.
What each inside bet pays and why
The payout on an inside bet is fixed by the number of pockets it covers, not by the wheel type. A straight-up bet pays 35 to 1 on both a European and an American wheel. A split pays 17 to 1, a street 11 to 1, a corner 8 to 1, and a six line 5 to 1. These are the standard table odds for the bets they describe.
The reason the payout does not match the true odds is the zero, or zeros. On a European wheel with 37 pockets, a straight-up bet has one winning pocket and 36 losing ones, so the true odds against winning are 36 to 1, while the payout is 35 to 1. That gap is the house edge. On an American wheel with 38 pockets, the true odds against a straight-up win are 37 to 1, while the payout remains 35 to 1. The extra pocket widens the gap without changing the payout.
| Inside bet | Numbers covered | Standard payout | What the payout gap means |
|---|---|---|---|
| Straight up | 1 | 35 to 1 | Largest payout, rarest hit; the zero pocket creates the gap |
| Split | 2 | 17 to 1 | Covers two adjacent numbers; smaller payout, better hit rate |
| Street | 3 | 11 to 1 | One full row; the chip sits on the row's outer edge |
| Corner | 4 | 8 to 1 | Four numbers meeting at one corner; moderate payout |
| Six line | 6 | 5 to 1 | Two adjacent rows; most frequent inside hit, smallest inside payout |
No inside bet carries a meaningfully different house edge from another on the same wheel, because the payout is always one unit short of the true odds by the same proportional amount. The choice between them is a choice about how often you collect and how much you collect, not about which bet is mathematically cheaper to make. That differs from outside bets, where some wagers on an American wheel carry a higher edge than others.
The decision points inside a round
The first decision is wheel type. If the table offers a single-zero wheel, that is the lower-house-edge version of the same game. The second decision is how to spread your stake. A player who puts one chip straight up on a single number is choosing a rare, large payout. A player who puts the same chip on a six line is choosing a more frequent, smaller payout. A player who splits the chip across several inside bets is choosing a middle path.
None of these choices changes the house edge on the bets themselves. They change the shape of the session: how often you win something, how large the wins are, and how long a given bankroll lasts at a given stake. A session built on straight-up bets will have long dry spells and occasional large hits. A session built on six lines will produce more frequent but smaller returns. Both are losing propositions in the long run on a negative-expectation game, and the rate of expected loss is set by the wheel and the total amount wagered, not by how you arrange the chips.
The third decision is when to stop. Because inside bets are high-variance relative to even-money outside bets, short sessions can swing far from the average. A player can hit a straight-up number on the first spin or miss it for a hundred spins. The only controls are stake size, session length, and a stopping point set before the first chip goes down.
Procedural mistakes new players make
The first mistake is placing a chip in the wrong position and not noticing until after the ball drops. A chip that sits half on a number and half on a line may be interpreted as a split rather than a straight-up bet, or may be pushed back by the dealer as unclear. On a digital layout, a tap in the wrong spot places a different bet than intended. Check the bet confirmation before the window closes.
The second mistake is assuming that a bigger payout means a better bet. A straight-up bet pays 35 to 1, which looks more attractive than a six line at 5 to 1, but the probability of collecting is proportionally lower. The payout is compensation for rarity, not a measure of value.
The third mistake is chasing a number. A number that has not appeared for many spins is not due. Each spin is an independent event on a properly functioning wheel, and the probability of any given number appearing is the same on every spin. A long absence is a normal part of the distribution, not a signal that a hit is coming.
Where the house edge lives
House edge and RTP are complements: they sum to 100% for the same game. On a European wheel, the single zero creates the gap between payout odds and true odds on every inside bet. On an American wheel, the double zero widens that gap. The edge is built into the payout schedule, not into the sequence of spins, and no betting pattern changes it.
If you want to know the exact house edge for the wheel in front of you, look at the wheel itself. A single zero means 37 pockets. A double zero means 38. The arithmetic follows from the pocket count and the payout table, which is printed on the layout or shown in the game's information panel. The table rules also state the minimum and maximum inside stake, and some tables cap the total that may be spread across inside positions in a single round.
FAQ
Can I place inside and outside bets in the same round?
Yes. The inside and outside sections are separate areas of the same layout, and a round may include chips in both. The inside bets settle on the numbered grid, the outside bets settle on the surrounding boxes, and each is paid according to its own payout schedule.
Why does a straight-up bet pay 35 to 1 when there are 37 or 38 numbers?
Because the payout is set below the true odds. On a European wheel there are 36 losing pockets for every winning one, so the true odds are 36 to 1. The payout of 35 to 1 leaves a gap, and that gap is the house edge. On an American wheel the gap is larger because there is one more losing pocket.
Is there an inside bet that gives the best chance of winning?
The six line covers six numbers, so it produces a winning spin more often than any other standard inside bet. But it also pays the least, at 5 to 1. No inside bet changes the house edge on the wheel; the choice is between frequent small payouts and rare large ones.
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