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Number 18 — the complete card

18 pays 35:1 straight-up ($10 wins $350 profit) on every wheel. It’s red, even, low (1–18), dozen 2, column 3, and hits 1 in 37 European spins / 1 in 38 American. ⚙ computed

On the wheel

European rim, reading 9 · 22 → 18 → 29 · 7. American rim: 19 · 31 → 18 → 6 · 21. Racetrack membership: Voisins du Zéro — the announced bets that physically cover this pocket (math here). “Neighbour” talk means the rim, never the felt — two different maps.

On the felt

Street trio: 16-17-18 (11:1). Split partners on the grid: 17, 15, 21 (17:1 each) — an edge-of-grid number, fewer corners than the interior. Every combination prices identically: the 36-pocket fiction doesn’t care which squares you pick.

Betting 18 — the honest numbers

At $10 per spin, 100 spins of straight 18 wagers cost an expected $27 on European wheels and $53 on American — identical to any bet, wrapped in maximum volatility (SD 5.8). Back-to-back 18: 1 in 1,369. In our 3.7-million-spin reference run, 18 landed 99,806 times against 100,000 expected (-0.19%) — textbook uniformity, the same verdict every number gets.

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Related

← 1719 →all numbersstraight-up math“best numbers” vs data

Frequently asked

What does 18 pay in roulette?
35 to 1 straight-up — a $10 bet returns $350 profit plus your stake. Splits touching 18 pay 17:1, its street 11:1.
Is 18 red or black in roulette?
18 is red — fixed by the traditional color chart on every wheel, even and low (1–18) for outside-bet purposes.
What are the neighbours of 18 on the wheel?
European rim: 22 and 29 adjacent, 9 and 7 beyond — a five-number “neighbours” call covers exactly this arc. Felt neighbours are different animals — wheel order and grid order share nothing.