Roulette Spin Simulator
Spin a roulette wheel up to 100,000 times in seconds and see exactly how the results fall. Choose a European, American or triple-zero wheel, set the number of spins, and get a full breakdown of red and black, odd and even, high and low, dozens, columns, and the hottest and coldest numbers. Every spin uses your browser's cryptographic random number generator, so each pocket has exactly the same chance on every spin, just like a fair wheel.
Simulator setup
Results
Run a simulation to see the breakdown.
Spin history
How to use the roulette spin simulator
- Choose your wheel. European has a single zero (37 pockets), American adds a double zero (38), and triple zero adds a third green pocket (39).
- Set the number of spins. Anything from 1 to 100,000.
- Press Spin. Results appear straight away, with the wheel’s house edge shown at the top.
- Review the breakdown and history. The history shows your most recent 500 spins.
- Download the CSV to analyze the full run in a spreadsheet. Each row has the spin number, the pocket and its color.
Your last run is saved in your browser. Press Reset to clear it.
European vs. American vs. triple-zero roulette
Every extra green pocket lowers your chance of winning on every bet and raises the house edge.
| European | American | Triple zero | |
| Pockets | 37 | 38 | 39 |
| Green pockets | 0 | 0,00 | 0,000,000 |
| Chance of red (or black) | 48.65% | 47.37% | 46.15% |
| Chance of a dozen | 32.43% | 31.58% | 30.77% |
| Chance of a single number | 2.70% | 2.63% | 2.56% |
| House edge | 2.70% | 5.26% | 7.69% |
The payouts are the same on all three wheels, so the extra zeros simply mean more spins where your bet loses. Run the same number of spins on each wheel and compare the green share to see the difference.
What the simulator shows you about randomness
Short runs are unpredictable: In 100 spins on a European wheel, red should land about 48.6% of the time. In practice it often lands anywhere from about 40% to 58%. At 10,000 spins, results usually fall within about 1 point of the expected figure, and at 100,000 spins the gap is tiny. This is the law of large numbers. It works over thousands of spins, not over one evening’s session.
Cold numbers are normal: Each number is expected to hit about 2.7 times in 100 European spins. On average, two or three numbers won’t appear at all in a 100-spin run. That doesn’t make them “due”.
Hot numbers are just as random: A number that hits six times in 100 spins is not more likely to hit on spin 101. The wheel has no memory, and every spin starts with the same odds.
Try it yourself: run 100 spins a few times and watch the hot and cold numbers change completely from run to run.
Ways to use the simulator
Learning the odds: Compare wheels and bet types to see how the house edge appears in real results.
Checking a betting idea: Download the CSV and test how a strategy would have played out across thousands of spins before you risk any money. To size the bets in a progression, use our Bankroll Calculator and Progression App.
Reading the bet layout: To see how much of the wheel a set of bets covers, try our Roulette Analysis tool.
FAQs
Is the roulette simulator truly random?
Yes. Each spin uses your browser’s cryptographically secure random number generator, with a correction that keeps every pocket exactly equally likely. That makes it as fair as a perfectly balanced physical wheel.
How many spins can I simulate?
Up to 100,000 per run. The latest 500 appear in the on-screen history, and the full run is included in the CSV download.
Can a simulator predict real roulette results?
No. Real spins are independent, so a simulation shows you what random results look like but can’t tell you what comes next.
What is triple-zero roulette?
A version with a 0, 00 and 000 pocket, found at some Las Vegas casinos. It has a house edge of 7.69%, nearly three times that of European roulette.
Which roulette wheel has the best odds?
European, with a house edge of 2.70%. Some French roulette tables also return half your stake on even-money bets when zero lands, which cuts the edge on those bets to 1.35%.
Do hot and cold numbers matter?
Only as a description of what has already happened. Every number has the same chance on the next spin whatever its recent history.
Play responsibly
Simulations are free. Real spins aren’t. Set a budget before you play, and only gamble with money you can afford to lose. If gambling stops being fun, call 1-800-GAMBLER or visit the National Council on Problem Gambling.