Every roulette payout is a promise, and every promise is slightly smaller than it looks. That gap — between what a bet should pay if the odds were fair and what it actually pays — is the whole architecture of the game, and reading the layout fluently means knowing that gap for every wager on the felt. Some bets win almost half the time and pay a single unit; others win less than once in forty spins and pay thirty-five. Between those poles sits a full spectrum of splits, streets, corners, dozens and columns, each with its own probability, its own payout and its own personality. Laid out completely, the odds of roulette are simpler than most players fear and more elegant than most players expect.
The two wheels behind every number
Before any bet can be priced, the wheel it sits on has to be named, because everything in roulette depends on how many zeros are spinning. A European wheel has 37 pockets — numbers 1 to 36 plus a single zero — and it is the standard for the mathematics below. An American wheel adds a second zero, making 38 pockets, and that extra pocket quietly reprices every bet on the layout in the casino’s favour. The outside bets are also affected by special French rules on some European tables, which refund or halve certain losses when zero appears. With the wheels named, each bet’s true odds can be stated honestly against the 37-pocket version, and the table later in this guide prices both versions side by side.
Inside bets: the precision wagers
The inner grid of the layout is where chips buy exact numbers or small clusters of them. These bets carry the longest odds and the fattest payouts, and their vocabulary is worth learning precisely, since a miscounted street or a stray corner changes the price of your money instantly. The five canonical inside bets:
- Straight-up — a single chip on one number, the purest bet on the felt, paying 35 to 1 against true odds of 36 to 1.
- Split — a chip on the line between two adjacent numbers, paying 17 to 1 with a winning chance of 2 in 37.
- Street — a chip on the outer edge of a row of three numbers, paying 11 to 1, or 6 to 1 for the six-line version that covers two streets at once.
- Corner — a chip at the intersection of four touching numbers, paying 8 to 1, with the rare five-number “basket” on American wheels paying an anomalous 6 to 1 and carrying a much steeper edge.
- Basket or trio — cluster bets combining zero with its neighbours, paying 11 to 1, mostly used by players covering the zero region of the wheel.
What the list reveals is a fixed ladder: each time the cluster grows by a number or two, the payout drops in proportion, and the house edge — roughly 2.7% on European wheels — stays glued to every rung. The only true outlier is the American five-number basket, which is the single worst bet in the building at nearly 8% edge and deserves to be avoided on sight.
Outside bets: the volume wagers
The outer border of the layout trades precision for coverage. Red and black, odd and even, the dozens and columns and the high-low ranges all wrap large swaths of numbers into single wagers, winning far more often and paying correspondingly less. The dozen pays 2 to 1 for covering 12 numbers; the column does the same from a different angle; and the even-money bets — red, black, odd, even, 1–18, 19–36 — cover exactly half the non-zero numbers and pay 1 to 1. These are the bets most staking systems are built on, and they behave almost identically in probability terms despite looking different on the felt.
Every payout and every true odd in one view
With both families defined, the complete price list of the game can be assembled. The chance of winning is stated for the 37-pocket European wheel, the fair payout is what those odds would justify, the actual payout is what casinos pay, and the edge column shows the tax collected by the difference — with the American figures added for every bet that exists on both wheels:
| Bet type | Numbers covered | Chance (European) | Fair payout | Actual payout | Edge (Euro) | Edge (US) |
|---|---|---|---|---|---|---|
| Straight-up | 1 | 1 in 37 | 36 to 1 | 35 to 1 | 2.70% | 5.26% |
| Split | 2 | 2 in 37 | 17.5 to 1 | 17 to 1 | 2.70% | 5.26% |
| Street | 3 | 3 in 37 | 11.67 to 1 | 11 to 1 | 2.70% | 5.26% |
| Corner | 4 | 4 in 37 | 8.25 to 1 | 8 to 1 | 2.70% | 5.26% |
| Six-line | 6 | 6 in 37 | 5.17 to 1 | 5 to 1 | 2.70% | 5.26% |
| Column / dozen | 12 | 12 in 37 | 2.08 to 1 | 2 to 1 | 2.70% | 5.26% |
| Even-money bets | 18 | 18 in 37 | 1.06 to 1 | 1 to 1 | 2.70% | 5.26% |
| Five-number basket (US only) | 5 | 5 in 38 | 6.6 to 1 | 6 to 1 | — | 7.89% |
Notice the pattern running down the payout column: it is not a menu of choices but a single ratio repeated at every level of coverage, and that is precisely why the edge is identical in every row. The casino’s engineering keeps the true payout always one pocket’s worth shy of fair, so switching from a corner bet to a column changes how often you win, never how much the house expects to keep. The lone exception — the American basket — is priced so badly that it stands apart even from its own wheel, which is why any complete picture of roulette odds should include it mainly as a warning.
The French rules that bend the edge
Two table rules, common on European wheels in land-based and online French roulette, exist purely to soften the zero’s bite on even-money bets. Both deserve attention before choosing a table:
- La partage — when zero lands, the croupier returns exactly half of every even-money stake instead of sweeping the whole bet, cutting the effective edge on those bets from 2.70% to 1.35%.
- En prison — the gentler variant: instead of taking half, the dealer imprisons the losing even-money stake for the next spin, and if the imprisoned bet wins on the follow-up, the original stake returns in full.
Both rules apply only to the six even-money bets — red, black, odd, even, high and low — and both assume a table where zero can appear on consecutive spins. Over the long run, either rule halves the expected cost of playing even-money bets, which makes a French table with la partage or en prison the cheapest place to stand on the entire roulette floor.
Reading the odds like a native
Once the price list is known, a few habits separate players who understand the layout from those who merely sit at it:
- Convert payouts to implied chances mentally — a 17-to-1 payout implies a 1-in-18 winning chance needed for fairness, and the split’s actual 1-in-18.5 chance shows the gap at a glance.
- Match bet size to bet type — inside bets need smaller chips because their swings are violent, while even-money bets tolerate larger units because their swings are gentle.
- Weigh every bet against its edge, not its frequency — a dozen that hits one spin in three is not “safer” than a straight-up in expectation terms; it is merely differently shaped.
- Check the zero rules before sitting down — single zero, French rules and absence of the five-number basket matter more than anything else on the layout.
- Remember the dollar version of the table — each row’s edge applied to your total turnover is the true price of your session, before variance scatters the result around it.
These habits do not create winners — the table guarantees that no reading of the layout can — but they prevent the two most expensive misunderstandings in the game: overpaying for bets whose edge is inflated, and believing that frequency of winning equals value of winning.
One table, one truth
Everything the wheel offers is now on a single page: 37 pockets on a European wheel, 38 on an American one, payouts that never quite reach fair value and two French rules that return a sliver of the difference. The complete list of roulette odds resolves into a surprisingly compact idea — the house charges roughly one pocket’s worth on every bet, wherever it sits, whatever it pays. The choice among bets is therefore a choice about rhythm and temperament, not about arithmetic: long quiet droughts punctuated by 35-to-1 bursts, or steady coin-flip noise at even money. Players who know both the prices and the personality of each wager get the two things roulette can actually deliver — a fair, transparent game played exactly as advertised, and the satisfaction of knowing precisely what every chip on the felt was purchased for.