Dozen bet — payout, odds and the ride
The Dozen bet covers 12 numbers (1–12, 13–24 or 25–36) and pays 2:1. It wins 1 in 3.1 spins (32.43%) on a European wheel, where it costs the standard 2.70% of everything you wager — 5.26% on American. Placement: the 1st/2nd/3rd 12 boxes.⚙ computed
The numbers, all three wheels
| Wheel | Win probability | Hits | House edge | Std deviation / $1 |
|---|---|---|---|---|
| European | 32.43% | 1 in 3.1 | 2.70% | 1.40 |
| American | 31.58% | 1 in 3.2 | 5.26% | 1.39 |
| French | 32.43% | 1 in 3.1 | 2.70% | 1.40 |
Same edge, different ride
On a European wheel every bet costs the same 2.70% — what changes is volatility. The Dozen bet’s standard deviation is 1.40 per $1: a mid-bumpy ride — streaks both ways. At $10 a spin over 100 spins you should expect to pay about $27 in edge, with session swings of roughly ±$140 one standard deviation around it.
The “sleeping dozen” — computed
Dozen-chasers wait for a third of the board to go quiet, then pile on. How quiet is normal? A chosen dozen misses 10 straight spins with probability 2.0% per window — and at least one 10-spin drought of your dozen occurs in 47% of 100-spin sessions. Droughts are furniture, not signals: the next spin stays 32.43%.
Try it live: put Dozen on the felt in the free simulator →
Related bets
Straight UpSplitStreetCornerall bets →
Frequently asked
What does the dozen bet pay in roulette?
2:1 — a winning $10 bet returns $20 profit plus your stake, on every wheel type. What differs between wheels is how often it wins, not the payout.
What are the odds of winning a dozen bet?
32.43% on a European wheel (1 in 3.1 spins) and 31.58% on American, because of the extra 00 pocket.
Is dozen a good bet?
It costs exactly the same edge as every other bet on the same wheel — 2.70% European. Choose it for the volatility profile (SD 1.40), not the price. The only real “good bet” decision is the wheel: French even-money at 2.70% is the cheapest game in the house.