Roulette Odds & House Edge
Roulette's odds are fixed and knowable, which makes it one of the easiest games to be honest about. This guide shows the true odds of each bet, what they actually pay, and how the gap between the two becomes the house edge. 18+, play within your limits.
True odds vs payout odds
On a single-zero wheel there are 37 pockets, so a single number has a true chance of 1 in 37. But a winning straight-up bet pays 35:1, as if there were only 36 pockets. That small shortfall, repeated across every bet, is the house edge.
The same logic runs through every bet: red/black pays 1:1 but does not win exactly half the time, because the green zero is neither red nor black. The payout always assumes slightly better odds than reality, and the casino keeps the difference.
2.7% European vs 5.26% American
The single green zero gives European roulette a house edge of 2.7% across all bets. Adding a second green pocket on the American wheel raises it to 5.26%. The payouts are identical, so the extra pocket is pure cost to the player, which is the core point of our American vs European comparison.
Probability of common bets winning on a European wheel: a single number about 2.7%, a dozen or column about 32.4%, and an even-money bet like red/black about 48.6% (not 50%, because of the zero).
What the edge means in rand
House edge is a long-run average, not a fee on every spin. A 2.7% edge means that, over time, you can expect to lose about R2.70 of every R100 wagered on European roulette; on American roulette it is about R5.26. Any single session can swing well above or below that, which is what makes the game exciting, but the average only goes one way over enough spins. That is why no betting system can turn it profitable. Back to the roulette guide or try the live roulette studio.
Frequently asked questions
What is the house edge in roulette?
It is the casino's long-run mathematical advantage, built into the gap between true odds and payout odds. On European roulette it is 2.7%; on American roulette it is 5.26%.
Why doesn't red/black win exactly half the time?
Because the green zero (and double zero on American wheels) is neither red nor black. On a European wheel an even-money bet wins about 48.6% of the time, not 50%, and that shortfall is the edge.
Does a lower house edge mean I will win?
No. A lower edge means you lose less on average over time, which is why European beats American. But roulette stays a negative-expectation game, so there is no guaranteed win at any edge.