Following a roulette session
A roulette session is a sequence of individual outcomes. This simulator records each spin, the total stake, the amount returned and the remaining virtual balance. Together, those figures explain the path shown on the balance chart.
Wheel versions and pockets
The European setting contains numbers 1 to 36 and a single zero. American roulette adds a double zero, while the triple-zero version also includes 000. The simulator therefore draws from 37, 38 or 39 pockets, depending on your selection.
Each simulated spin selects one pocket independently. Repeating a run with the same settings can produce a different sequence and ending balance.
From chips to a session stake
Selecting a chip and placing it on the table adds its value to that position. You can place chips on individual numbers or the displayed outside bets. Repeated placements on a position add together. Undo removes the most recent placement, and Clear bets empties the table.
All placements form the total stake for each spin. The simulator repeats that same set of bets throughout the run, for up to the number of spins requested.
Reading returns and the balance
A winning single-number bet returns 36 times its stake, including the stake. A winning outside bet returns twice its stake. Zero pockets produce no return for the displayed outside bets.
For each spin, the balance loses the full session stake and gains the combined returns from winning positions. A return of 36 units on a total stake of 40 units therefore changes the balance by minus 4 units.
Comparing recorded sessions
The result retains the wheel version and placements used in that run. Read them with the completed spin count before comparing two sessions. A session finishes early when the remaining balance cannot cover another full stake.
The chart shows the balance path, while the expandable spin history supplies the figures behind it. These records describe the virtual session you just generated.
House edge by roulette version
These figures are for standard published layouts. They are not a forecast of a short practice session. On even-money bets, RTP is 100% minus the house edge.
| Bet and layout | House edge | How it is derived |
|---|---|---|
| European even-money (37 pockets) | 2.70% | 18 wins and 19 losses in 37 spins: (18 − 19) / 37 = −1/37 ≈ −2.7027%, conventionally 2.70%. |
| American even-money (38 pockets) | 5.26% | 18 wins and 20 losses in 38 spins: (18 − 20) / 38 = −2/38 = −1/19 ≈ −5.2632%, conventionally 5.26%. |
| American first-five (0, 00, 1, 2, 3) at 6:1 | 7.89% | (5/38) × 6 + (33/38) × (−1) = −3/38 ≈ −7.8947%, conventionally 7.89%. |
| Triple-zero even-money (39 pockets) | 7.69% | 18 wins and 21 losses in 39 spins: (18 − 21) / 39 = −3/39 = −1/13 ≈ −7.6923%, conventionally 7.69%. This simulator includes this layout. |
Source: Wizard of Odds, Roulette Basics. For a comparison with banker and player bets in baccarat, see the Baccarat Simulator.
This is a free practice tool that uses virtual credits. It is not a way to make money, and it does not change the odds of any real-money game. If you gamble with real money, set a limit and use your local self-exclusion or support services if play stops being fun.