Roulette History: From French Casinos to Online Roulette Demo Games
Roulette began as a 17th-century French invention, took its modern single-zero form in the mid-1800s, gained a double zero in 19th-century America, and now exists in physical casinos and online RNG-based games worldwide. The wheel has changed surprisingly little in 200 years.
Where Did Roulette Come From?
Roulette - literally "little wheel" in French - emerged from the wider European fashion for wheel-based games of chance in the 17th and 18th centuries. Mathematician and inventor Blaise Pascal is often credited with the earliest version of a spinning wheel device while attempting to build a perpetual motion machine in 1655. The game took its first recognisable form in Paris in the late 18th century, combining the spinning wheel with a betting layout.
The French Origins of Roulette
By the late 1700s, roulette was being played in Parisian gambling houses with a wheel containing both a single zero and a double zero. Early French references describe the layout, the colour scheme, and the basic inside and outside bets that still exist today. The game spread quickly because the rules were simple to learn and the spectacle of the spinning wheel made the table an attraction in itself.
How European Roulette Developed
The defining moment for European roulette came in 1843, when François and Louis Blanc introduced a single-zero wheel at their casino in Bad Homburg, Germany. The single-zero wheel offered a meaningfully lower house edge than the double-zero versions of the era, which was a strong commercial advantage. The Blancs later moved their operation to Monte Carlo, and the single-zero wheel became the standard across continental Europe.
This is the wheel still used in European and French roulette today: 37 pockets, one green zero, and a house edge of 2.70% on standard bets.
How American Roulette Added the Double Zero
Roulette crossed the Atlantic with European immigrants in the early 19th century. American gambling halls, especially along the Mississippi and in New Orleans, kept the double-zero wheel even after the single-zero version had become standard in Europe. The double-zero design effectively doubled the house edge and helped operators run profitable games against a clientele that often demanded higher table action.
The American wheel order also evolved differently, designed so that consecutive numbers face each other across the rotor. The result is the American roulette format that still defines casino floors in Las Vegas, Atlantic City, and across the United States: 38 pockets, two greens, 5.26% house edge.
Roulette in Land-Based Casinos
By the late 19th century, roulette had become a fixture of glamorous European casinos - Monte Carlo, Baden-Baden, Spa - and a staple of American gambling halls. The early 20th century saw further refinement: standardised pocket dimensions, regulated payouts, and the introduction of professional dealers. After World War II, the game spread globally as casino regulation modernised. By the 1970s, roulette tables were a fixed feature of every major casino jurisdiction.
Physical wheels became increasingly precise during this period. Manufacturers tightened tolerances on pocket size, fret height, and rotor balance to prevent bias. Casinos rotated wheels regularly and trained dealers in techniques that further randomised ball behaviour.
Bias and Famous Players
The early industrial era of roulette produced several famous attempts to exploit physical bias. In 1873, the British engineer Joseph Jagger paid clerks in Monte Carlo to record thousands of spins, identified a biased wheel, and reportedly won the equivalent of millions in modern money. In 1947, a team of physics students led by Albert Hibbs and Roy Walford applied a similar method on a wheel in Reno. These stories shaped the industry's commitment to wheel quality and rotation policies.
Roulette in Online Casinos
The first online casinos appeared in the mid-1990s, and roulette was among the first games to make the transition. Early online roulette used straightforward random number generation to determine the result of each spin. As regulators developed standards, RNGs became certified and audited by independent laboratories such as eCOGRA, iTech Labs, and Gaming Laboratories International.
Modern online roulette runs on certified RNG software that produces a uniformly distributed result for each spin. There is no physical wheel involved, and the visual animation of the wheel and ball is a rendering of the RNG output rather than a simulation of physics. For a deeper look at how this works, see our RNG explainer.
Live Dealer Roulette
The 2010s brought live dealer roulette - a hybrid format that streams a real wheel and dealer from a studio to online players. The format reintroduced physical mechanics to online play and grew rapidly. Major studios such as Evolution, Pragmatic Live, and Ezugi now operate hundreds of live roulette tables for a global audience.
Roulette Demo Games and Free Simulators
Free roulette demos appeared alongside the first online casinos as a way for new players to learn the game without depositing. Today, demo roulette is also a popular tool for studying betting systems, understanding bet types, and feeling the variance of fair RNG without any financial exposure. The Roulette Demo on this page is one such free simulator, designed specifically for education and system testing.
Roulette Today
European, American, and French variants remain the three dominant formats. French roulette with La Partage offers the lowest house edge to the player; American roulette remains popular in the United States despite its higher edge; and European roulette is the global default both online and in most international land-based casinos.
Roulette is older than most casino games and has survived several waves of technological change largely intact. The wheel is essentially the same object that François and Louis Blanc placed in Bad Homburg in 1843. What has changed is the surrounding infrastructure - regulation, RNG certification, live streaming, and the role of free demos in learning the game.