Roulette — the odds, computed
What this game returns, where the number comes from, and what a real casino is and is not obliged to tell you.
Published return
97.2973%exact
Computed at load from the game’s own constants — the same source the casino itself uses to pay. Nothing on this line is typed by hand.
Exact: the game’s outcome space is small enough to enumerate in full.
What a real casino would do
Derived — check the arithmetic yourself
A real European wheel has a house edge of exactly 1/37 = 2.70%.
- 37 pockets, 0 to 36. Every bet on the table pays as if there were 36.
- Red: 18 winning pockets x 2 / 37 = 97.30% returned
- Black: 18 winning pockets x 2 / 37 = 97.30% returned
- Even: 18 winning pockets x 2 / 37 = 97.30% returned
- Every bet returns 36/37 = 97.30%. The edge is the single zero and nothing else.
- Checked against all 10 bets in this game’s own table. Identical.
- An American wheel adds a second zero: 36/38, a 5.26% edge. That is the whole difference.
This game is a European wheel, so our published figure and the real-world one are the same number.
Explore it
The interactive odds explorer and bankroll simulator for Roulette let you change the stake and see the expected value move, computed live from the same constants.
Play Roulette · Every mistake we have made · What is an AI-powered casino?
Flickloot is free play. Gold Coins are granted, never sold — no money, no purchases, no prizes, no redemptions. Every figure on this page is computed from the same constants the game runs on. 18+ · gamblingtherapy.org