About Roulette Simulator

Roulette Simulator is an educational roulette table at roulettesim.app. Nothing on the site is played for real money. The house edge is 2.70% on a European wheel and 5.26% on an American wheel, and no betting system changes it. The site exists so you can see that for yourself over many spins instead of taking it on faith. You can pick a system, run it for thousands or millions of spins, and look at the results.

One developer built the site and runs it alone. There is no company behind it.

The table simulates two wheels. The European wheel has 37 pockets and a single zero. The American wheel has 38 pockets, with a zero and a double zero. A seeded pseudo-random generator called Mulberry32 produces every spin. The same seed always gives the same sequence of spins, so you can reproduce any run from its seed. The 7 strategy simulators cover Martingale, Fibonacci, D'Alembert, Paroli, Labouchere, and Oscar's Grind, plus a strategy tester. The site also has 6 strategy guides, 17 bet-type pages with computed odds for both wheels, and 4 head-to-head strategy comparisons. All of them take their numbers from this engine and state the seeds they used, so you can reproduce the results.

The Strategy Builder lets you write your own betting rules and test them. Free runs stop at 100,000 spins. Premium members can start a Deep Run of up to 100 million spins. Each run reports the bust rate, the distribution of outcomes, and the worst-case tails. In the Marketplace, players publish their strategies. Anyone can run a published strategy with the Strategy Copilot, which places the bets while you spin.

Ranked play works differently. The server deals and resolves each ranked spin, so the site can verify every score on the leaderboard. You get 150 ranked spins per day.

The table, the simulators, the guides, and the reference pages are free to use. Premium costs $39 a year or $4.99 a month. It adds Deep Runs of up to 100 million spins, parameter sweeps, shareable results, and dark mode, and it removes ads. One membership also covers Blackjack Trainer at blackjacktrainer.io, a sister site by the same developer. Premium does not change the odds. Every player spins against the same house edge.

Every chip on the table is play money. The site does not take real bets and has no affiliation with any casino.

One developer has built and run Roulette Simulator since June 2025, and every change since the first commit that month is his.

To reach him, use the Contact page or the feedback button on every page. If a number on the site looks wrong, send the seed with your report so the run can be reproduced. The public changelog at /changelog lists changes to the site.