In short: Double Ball Roulette launches two balls in one spin. Inside bets win if either ball hits (a single number pays 17:1, or 34:1 if both hit), while outside bets win only if both balls land in your group, paying 3:1 on red or black. On a double-zero wheel the best bet, a single number, has a 5.33% house edge.
Double Ball Roulette uses two balls in one spin. This guide describes the physical double-zero version, with 38 pockets. Single-zero and online versions also exist; check the actual game’s rules before applying this payout schedule.
The physical version uses compressed air to launch the balls. That launch mechanism should not be described as proof that collisions are impossible or that the outcomes are independent.
If both balls independently have an equal chance of landing in each of 38 pockets, the probability of any matching pair is 38 × (1/38)² = 1/38. The probability that both land on one number selected in advance is (1/38)² = 1/1,444. These are different events, and the calculation assumes uniform, independent outcomes; it is not a claim that we tested a physical wheel.
Similar to American roulette, in Double Ball Roulette the wheel consists of 38 divisions (numbers 1 to 36, a single zero and a double zero), while the betting layout on the table is almost the same.
When placing inside bets, a player has two chances of success, however, the payouts are lower than those in traditional roulette. On the other hand, when placing outside bets, a player wins if both balls drop into the selected numbers. Payouts for outside bets, however, are higher than those in traditional roulette.
The rules of the game:
- The game uses a traditional double-zero wheel.
- The betting layout in Double Ball Roulette features the same elements as those in American roulette.
- The game includes two balls. A player can be given a remote-controlled button to trigger the air launcher.
- Outside bets win when both balls turn out to be successful.
- Inside bets win when either of the two balls turns out to be successful. The player has a chance to earn twice as much, in case both roulette balls turn out to be successful.
- The game features a ”Double Ball Jackpot” bet. In order for this bet to win, both roulette balls need to drop into the chosen numbered pocket.
- Players are allowed to place a wager, which encompasses both colors (red and black).
Now, let us take a look at different bets and their respective payouts.
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Types of bets that are to be made
1. Straight-Up Bet: Placed on any single number, including “0” and “00”, and directly on the number. Its payout is 17 to 1, in case either of the balls comes to rest on the selected number. The payout becomes 34 to 1, in case both balls settle into the selected number.
2. Split Bet: Features two adjacent numbers and is placed on the line between these numbers, including ”0” and ”00”. Its payout is 8 to 1, in case either of the balls comes to rest on one of the selected numbers. The payout becomes 16 to 1, in case both balls settle into one of the selected numbers.
3. Street Bet: Features all three numbers in a row and is placed on the line at the end of the row. There are other options for its placement as well; it can include 0, 1, 2; 0, 00, 2; 00, 2, 3. Its payout is 5 to 1, in case either of the balls comes to rest on one of the selected numbers. The payout becomes 10 to 1, in case both balls settle into one of the selected numbers.
4. Corner Bet: Features a group of four numbers and is placed at the corner where these four numbers touch. Its payout is 3 to 1, in case either of the balls comes to rest on one of the selected numbers. The payout becomes 6 to 1, in case both balls settle into one of the selected numbers.
5. Five Bet: Features 0, 00, 1, 2, and 3 and is placed at the corner by 0 and 1. Its payout is 5 to 2, in case either of the balls comes to rest on one of the selected numbers. The payout becomes 5 to 1, in case both balls settle into one of the selected numbers.
6. Line Bet: Features six numbers (or two rows of three numbers) and is placed at the end of two rows, on the border between them. Its payout is 2 to 1, in case either of the balls comes to rest on one of the selected numbers. The payout becomes 4 to 1, in case both balls settle into one of the selected numbers.
7. Bets on Red/Black, Even/Odd, Low/High: All of these bets have a payout of 3 to 1, in case both balls settle into one of the selected 18 numbers.
8. Dozen Bet and Column Bet: These bets have a payout of 8 to 1, in case both balls settle into one of the selected 12 numbers.
9. ”1 Red, 1 Black” Bet: Offers a payout of 1 to 1, in case one of the balls settles into a red number and the other ball lands in a black number.
10. ”Double Ball Jackpot”: Offers a payout of 1 200 to 1, in case both balls settle into one and the same selected number. Some versions pay 1,300 to 1 instead, so check the paytable.
Reading the payouts
All payouts above are net winnings relative to the stake; a winning stake is returned separately. On an inside bet, the lower payout applies when exactly one ball hits the selection, and the higher payout applies when both do. Two chances to hit do not mean twice the chance of a profitable session.
For example, on double-zero roulette the probability that at least one ball hits a chosen number is 1 − (37/38)² = 75/1,444. For both balls to land red it is (18/38)² = 324/1,444. At 3:1, that red bet has an expected net return of 4 × 324/1,444 − 1, or approximately −10.25% per unit staked, under the same independence assumption.
Rules reference: Michael Shackleford’s Double Ball Roulette rules and house-edge analysis on Wizard of Odds. The similarly named Double Action Roulette uses one ball and two number rings, so it needs a different rules explanation.
Further reading: Evolution’s separate live Double Ball Roulette version (check its own rules and paytable).
