What the question is really measuring
The moment you ask whether roulette has the worst odds, you are comparing the built-in advantage the house keeps on every wager. That advantage is not a single number across all roulette tables. It changes with the wheel layout, and it changes again with the bet you place. The same is true of every game you might compare it against.
House edge and Return to Player (RTP) are complements: they sum to 100% for the same game under the same rule set. A game with a larger house edge returns a smaller share of all wagered money over a very large number of spins or hands. That is a long-run statistical average, not a per-session guarantee. A single evening can end far above or far below the average, which is why players can walk away ahead from a game that mathematically favours the house.
Two wheels, two different edges
Roulette's first split is the wheel itself. 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 on the American layout increases the house edge because the payout for a winning number does not change while the chance of that number appearing shrinks.
To see why, imagine a bet that pays 35 to 1 on a single number. On a European wheel there are 37 pockets, so the true odds against hitting that number are 36 to 1. The house pays 35 to 1 and keeps the difference. On an American wheel there are 38 pockets, so the true odds are 37 to 1 while the payout stays at 35 to 1. The gap between the true odds and the payout widens, and the house edge grows with it.
This is the cleanest way to read any roulette table: find the wheel type first, then look at the bet. The wheel sets the baseline. The bet sets how far above that baseline your expected loss runs.
Not every roulette bet carries the same edge
On the same wheel, different bets can carry materially different edges. The split is sharpest on an American wheel. The five-number basket bet covering 0, 00, 1, 2 and 3 pays 6 to 1, but there are 38 pockets and only five winning numbers. The true odds are worse than the payout by a wider margin than on the outside bets. The result is a higher house edge than the even-money red, black, odd, even, high and low bets on the same wheel.
Outside bets do not escape the edge; they just carry a smaller one. A bet on red pays even money, but the zero pockets are neither red nor black. The house keeps its advantage through those green pockets, which is why an even-money bet does not pay at true odds.
| Bet type | What changes | What stays fixed |
|---|---|---|
| Single number | Payout is 35 to 1; true odds depend on wheel type | House edge is set by the gap between payout and true odds |
| Even-money outside bet | Pays 1 to 1; zero pockets are losing outcomes | House edge comes from the zero pockets, not the payout ratio |
| Five-number basket (American wheel only) | Covers 0, 00, 1, 2, 3; pays 6 to 1 | Wider gap between payout and true odds than other bets on the same wheel |
| European wheel | 37 pockets, single zero | Lower house edge than American wheel on comparable bets |
| American wheel | 38 pockets, single and double zero | Higher house edge than European wheel on comparable bets |
How roulette compares with other table games
Roulette does not hold the title of worst odds in the casino by default, because the comparison depends on which bet you place and which rule set you face. Some table games offer bets with a smaller house edge than the best roulette bets. Others offer bets with a larger edge than the worst roulette bets.
Blackjack's objective is a hand total closer to 21 than the dealer's without exceeding it. Published basic-strategy charts derive from the specific rule set in use: deck count, dealer stand rules, doubling and splitting rules. Under one rule set, a player following the correct chart faces a smaller edge than a European roulette player on an even-money bet. Under a different rule set, the edge shifts.
Craps is built around the pass line and the come-out roll. Different bet types on the same table carry materially different house edges. The pass line bet sits near the low end of the table. Some proposition bets in the centre of the layout sit far above the worst roulette bets. The game's range is wider than roulette's.
Baccarat compares the player and banker hands, with totals taken modulo 10. Banker, player and tie bets carry different house edges, with the tie bet the highest. The banker and player bets generally sit below roulette's outside bets, while the tie bet sits above most roulette wagers.
The honest answer is that roulette's odds are not the worst across the board. On an American wheel with a five-number basket bet, they are poor. On a European wheel with an even-money bet, they are middling. The casino always keeps an edge; the size of that edge is what varies.
Why a short session looks nothing like the average
House edge is a long-run property. It describes what happens across a very large number of spins, not what happens on a Tuesday evening. In a short session, variance dominates. A player can hit a single number early and leave ahead, or lose every outside bet for an hour and leave down far more than the edge would predict.
Volatility does not change a game's RTP. It changes how payouts are distributed over time. A high-volatility game pays rarely but in larger chunks; a low-volatility game pays often but in smaller amounts. Roulette's volatility varies by bet. A single-number bet is high volatility: most spins lose, but a win returns a large multiple. An even-money bet is lower volatility: wins come more often, but they only return the stake. Over a large number of spins, both bets converge toward their own house edge. Over a short session, either can land anywhere.
Suppose you place an even-money bet of one unit on every spin of a European wheel. The edge on that bet is a small fraction of each unit wagered. After one hundred spins, your actual result could easily be several units above or below the expected loss. After one hundred thousand spins, the gap between your result and the expected loss shrinks as a share of total wagered money. That is what a long-run average means: the average becomes visible only when the number of trials is large enough to drown out the variance.
Decisions per hour change total exposure
The house edge is a rate, not a fixed cost. It applies to every unit you wager. The more decisions you make per hour, the more units you put through the game, and the larger your expected loss in absolute terms even when the edge stays the same.
Roulette is a slower game than some alternatives. A table with several players takes time between spins for bets to be placed and payouts to be settled. An electronic roulette terminal or an online game can run much faster, because there is no physical wheel to spin and no other player to wait for. The same edge applied to more spins per hour produces a larger expected loss per hour.
This is the clearest lever a player controls. You cannot change the edge on a given bet. You can change how many times you expose money to it. A session of fifty spins costs less in expectation than a session of five hundred spins at the same stake, even though the edge on each spin is identical.
Why progression systems do not remove the edge
A progression system is a rule for changing your stake after wins or losses. The most famous is doubling after a loss, on the theory that a win eventually recovers all previous losses plus one unit. The arithmetic works on paper as long as three conditions hold: you have an unlimited bankroll, the table has no maximum bet, and you can keep playing indefinitely. None of those conditions holds in a real casino.
The deeper problem is that a progression does not change the probability of any individual spin. A red bet on a European wheel has the same chance of winning on the tenth spin after nine blacks as it did on the first spin. The wheel has no memory. The zero pockets are still there. The house edge is still applied to every unit wagered.
What a progression does is redistribute outcomes. It turns many small wins into a few large losses. Suppose you double your stake after every loss on an even-money bet. Most sessions end with a small profit, because a win eventually arrives and recovers the sequence. A minority of sessions end with a very large loss, because the losing streak outruns your bankroll or the table limit. The average of all those sessions still converges toward the house edge. The system has changed the shape of the outcomes, not the expected value.
No betting pattern changes the built-in edge of a negative-expectation game. Bet selection changes the edge you face, because different bets carry different edges. Game speed changes your total exposure. Session length changes how much variance you experience. A progression changes none of those; it only rearranges when the losses land.
Reading the numbers on your own table
When you want the specific edge for a bet, the table itself carries the information you need. The wheel type is visible at a glance: a European wheel shows one zero, an American wheel shows two. The payout for each bet is printed on the layout. The gap between the payout and the true odds, given the number of pockets on that wheel, is the edge.
For other games, the rule set is the document that matters. Blackjack's edge depends on the posted table rules. Craps edges are printed on the layout for each bet. Baccarat edges follow from the payout on the banker bet, which is typically reduced by a commission, and from the fixed payouts on player and tie. The house edge is never a secret; it is a consequence of the payouts and the probabilities, both of which are visible before you place a bet.
FAQ
Is roulette worse than slot machines?
That comparison depends on the specific slot and the specific roulette bet. Slots carry a wide range of RTPs, and the RTP is set in the game's published information panel. A high-RTP slot can carry a smaller house edge than an American roulette basket bet, while a low-RTP slot can carry a larger edge than a European even-money bet. Check the game information panel for the slot and the wheel layout for the roulette table.
Which roulette bet has the lowest house edge?
On a European wheel, the even-money outside bets and the other bets that pay at true odds for their coverage, apart from the zero, carry the lowest edge. On an American wheel, the five-number basket bet carries the highest edge, and the outside bets carry a lower edge than the basket but a higher edge than the same bets on a European wheel.
Can you reduce the roulette house edge by betting on more numbers?
Covering more numbers changes your chance of winning on any given spin, but it does not reduce the edge. Each bet you place carries its own edge, and the total expected loss is the sum of the edges on all the units you wager. Betting on red and black at the same time, for example, leaves you exposed to the zero pockets on every spin, which is where the house keeps its advantage.
Play responsibly
Gambling should be treated as paid entertainment, never as a way to earn income or recover losses. 1-800-MY-RESET (1-800-697-3738)
18+ or 21+ depending on where you are; follow the minimum age that applies to you.
This article is general information about how these mechanics work. It is not legal advice and not a recommendation to gamble or to use any particular operator. Availability and legality differ by jurisdiction — check the rules that apply where you are.