Outside bets use the labeled areas beside the numbered grid. Even-money bets cover 18 numbers. Dozens and columns cover 12. Their larger coverage gives more winning outcomes than a straight-up wager, with a smaller profit payment on each win.
Know which numbers belong
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| Selection | Covered group | Profit payout |
|---|---|---|
| Red or black | The 18 numbered pockets of that color | 1 to 1 |
| Odd or even | The 18 odd or even numbers from 1 to 36 | 1 to 1 |
| Low or high | 1–18 or 19–36 | 1 to 1 |
| First, second or third dozen | 1–12, 13–24 or 25–36 | 2 to 1 |
| First, second or third column | One grid column of 12 numbers | 2 to 1 |
Zero belongs to none of these groups, and neither does double zero. Under ordinary full-loss rules, either loses every selection above. Optional la partage or en prison treatment concerns specified even-money wagers; it does not automatically extend to dozens or columns.
Two dozens cover 24 numbers
Place 1 chip on the first dozen and 1 on the second. Total stake is 2. If a number from 1 through 24 wins, one dozen returns 3 and the other loses, giving 1 chip of net profit. A result from 25 through 36, or zero on a European wheel, loses both chips.
The hit rate is 24/37, about 64.86%. Compare the 3-chip return with the entire 2-chip stake. A high hit rate does not mean every hit produces a large gain. The overlapping-bets guide extends this accounting to combinations sharing numbers.
Red plus black leaves zero uncovered
One chip on each color returns 2 whenever a numbered pocket wins. One wager wins and one loses, so net profit is zero. On zero, both lose. Covering the two colors leaves the green outcome outside both sets.
Use the calculator for one wager, roulette probability to compare coverage with total pockets, and inside bets to learn smaller selections.
Sources and scope
- Rules of Play for Table Games, Roulette. British Columbia Lottery Corporation. Double-zero standard payout table and placement. European pocket count is independently verified from native Wheel.
Publication date: not stated. Checked 2026-11-07.
- Roulette probability derivation. Amenti Labs LLC. Fair independent pockets, fixed payouts, full outside loss on zero. Formula and all supported bets regression tested.
Publication date: 2026-11-07. Checked 2026-11-07.