One extra pocket, nearly double the house edge
A European roulette wheel has 37 pockets, numbered 0 to 36. An American wheel has 38, with a second green pocket marked 00. That single addition takes the house edge from 2.70% to 5.26%, and nothing else about the game changes: the bets are the same, the payouts are the same, the table looks almost identical. A player who cannot tell the two wheels apart at a glance is playing at nearly double the cost for no extra entertainment.
French roulette uses the same single-zero wheel as the European version but adds a rule called la partage, which returns half of a losing even-money bet, red or black, odd or even, high or low, whenever the ball lands on zero. That rule alone cuts the house edge on those bets to 1.35%, the best number on this page for any wheel-based game. Some French tables extend the idea with en prison, which locks the bet in place for one more spin instead of returning half immediately; the effect on the long-run edge is close to identical, and either version is worth seeking out over a plain European table.
| Variant | Zeros | House edge | Notes |
|---|---|---|---|
| European | Single (0) | 2.70% | The standard online default |
| American | Double (0, 00) | 5.26% | Avoid where a European wheel is available |
| French, la partage | Single (0) | 1.35% on even-money bets | Half stake returned on zero, even-money bets only |
Inside bets: the numbers on the layout
The betting layout is a grid of the 36 numbers, red and black, plus the zero (or zeros) at one end. Bets placed on or between the numbers themselves are called inside bets, and they trade a lower probability of winning for a higher payout. A straight-up bet, a single chip on one number, pays 35:1. A split, straddling the line between two adjacent numbers, pays 17:1. A street, covering a row of three numbers, pays 11:1. A corner, touching four numbers at their shared point, pays 8:1, and a six-line, covering two adjacent rows of three, pays 5:1.
None of those payouts is generous relative to the true odds. On a European wheel the true odds against a single number are 36 to 1, against a 35:1 payout, and that one-unit gap across every bet type on the layout is where the 2.70% house edge actually comes from. Every inside bet returns the same long-run percentage; the higher payouts simply come with proportionally lower chances of landing.
Outside bets and the even-money wagers
Outside bets sit around the edge of the number grid and cover broader groups. Red or black, odd or even, and high (19-36) or low (1-18) are the three even-money bets, each paying 1:1 and covering 18 of the 36 numbers. A column bet or a dozen bet, covering twelve numbers each, pays 2:1. These are the bets that la partage touches on a French wheel, and they are also the bets most new players reach for first, because a near-50% chance of doubling a stake feels more approachable than a 1-in-37 shot at 35:1.
The two approaches are mathematically identical in the long run on the same wheel: the house edge does not care whether it is extracted through many small losses on an outside bet or occasional large ones on an inside bet. What changes is the shape of a session, long stretches of small, frequent losses on one side, and rarer, sharper swings on the other.
Hot numbers, cold numbers, and the gambler’s fallacy
A digression, because every roulette table online seems to carry a “statistics” panel showing which numbers have come up most and least often in recent spins, and it is worth being clear about what that panel actually tells a player: nothing useful. Each spin of a roulette wheel is independent of every spin before it. A number that has not appeared in forty spins is not “due”, and a number that has appeared five times running is not “hot” in any sense that changes the odds of the next spin.
That belief has a name, the gambler’s fallacy, and it is one of the oldest documented errors in the study of gambling behaviour. It persists in roulette specifically because the statistics panel exists at all; displaying recent results implies they mean something, even though the wheel has no memory of them. The panel is not dishonest, exactly, since the numbers it shows are real, but treating it as a guide to the next spin is a mistake the house edge does not need any help from.
The table, the wheel, and how a spin actually resolves
An online roulette table splits into two halves on screen: the wheel, where the ball is released and the result decided, and the betting grid, where chips are placed before the spin. RNG versions resolve the wheel instantly against a certified random number generator, so a full round, betting through result, takes only a few seconds. Live versions stream an actual wheel and an actual dealer from a studio, run to that studio’s timing, and take closer to a minute per round once betting time is included; the live casino page covers which studios supply which partners and how bonus wagering treats live tables differently from RNG ones.
Which partners actually carry it
JackpotCity is the clearest case among the partners checked directly this month: its site lists a dedicated online roulette page naming American, European and French variants, plus a separate live roulette section, both live on its navigation as of September 2026. The JackpotCity review has more on the rest of its catalogue.
Nomini and 21Bit both run several live roulette tables rather than a standalone RNG page, drawing on studios including Evolution, Pragmatic Play Live and Platipus, again checked in September 2026. The Nomini review and the 21Bit review cover their live lobbies in more depth. A handful of the other partner sites redirected to country-specific pages or timed out when checked this month, so this page does not make a claim either way about their roulette catalogue; the individual casino reviews note what could and could not be confirmed for each brand.
Practising before the wheel spins for real money
None of the above matters much without a feel for the table itself, and that is what the roulette trainer is for: every bet type on the European, American and French layouts, its true odds against its payout, and a simulator that plays out what a betting system such as the Martingale actually does over a run of spins, usually not what its advocates claim. It costs nothing and asks for no account, which is more than can be said for finding out the same lesson at a live table.
The casino games hub has the wider house-edge comparison across every table game on this site, and online blackjack is the one game on that list that beats roulette’s numbers outright, at the cost of a considerably steeper learning curve.
None of that makes roulette a bad choice. It remains the one table game on this site that needs no strategy chart, no drawing rules and no memorised decisions, and a European or French wheel at 2.70% or 1.35% is a reasonable price to pay for that simplicity. What it should not be mistaken for is a game where the wheel colour, the number sequence on screen, or a well-worn betting system changes what any of those figures actually are.