Online roulette: European, American, French and the maths behind each

European roulette uses a single zero wheel (0, 1, 2, …, 36). The house edge is exactly 2.70%, giving an RTP of 97.30%. This is the standard in most regulated European markets and the version you should default to.

American roulette adds a second green pocket ("00"), making 38 pockets in total. This single change almost doubles the house edge to 5.26%. In monetary terms: on a €100 session at American roulette you should expect to lose about €5.26 on average; on the same session at European roulette you should expect to lose €2.70. If both are available at your casino, there is no reason to play the American version.

French roulette is European roulette with an added rule called La Partage (or sometimes En Prison). If you bet on an even-money chance (red/black, even/odd, high/low) and the ball lands on zero, you get half your bet back. This halves the house edge on those specific bets to 1.35%, giving an RTP of 98.65% — the best RTP of any table game in a casino. If French roulette is available, prefer it for even-money bets.

Roulette bets split into two categories: inside bets (betting on specific numbers or small groups) and outside bets (betting on characteristics like colour or range).

Inside bets pay more but hit less often. A single number (straight-up) pays 35:1 and has a ~2.7% chance on European. Splits (two numbers) pay 17:1, streets (three numbers) pay 11:1, corners (four numbers) pay 8:1.

Outside bets pay less but hit more often. Red/black, even/odd and 1-18/19-36 pay 1:1 with ~48.6% chance. Dozens and columns pay 2:1 with ~32.4% chance. These are where the La Partage rule in French roulette becomes valuable.

One critical detail: all bet types have roughly the same expected value in European roulette (around -2.7%) because the odds are balanced against the payout. No bet is "better" mathematically — only different in terms of variance. A straight-up bet is high variance (long dry spells, big wins); red/black is low variance (small swings around the average).

Virtual roulette runs on an RNG identical in principle to a slot. Each spin is independent and the wheel is simulated. Minimum bets are usually low (€0.10–€1) and the game is fast — up to 50 spins per hour.

Live dealer roulette is streamed from a real physical wheel in a studio (typically Malta, Riga or Bucharest) with a human croupier. Spins are slower — around 30–40 per hour — which tends to help with bankroll management. Minimum bets are usually a bit higher (€0.50–€1).

The RTP of both is identical in theory. In practice, live dealer roulette is preferred by players who want the visual reassurance of a physical wheel; virtual is preferred by those who want higher volume or lower stakes.

Search for "roulette strategy" and you will find Martingale, Fibonacci, D'Alembert, Labouchère and dozens of variants. All of them work mathematically the same way: they redistribute variance. None of them reduce the house edge.

The Martingale (double after every loss) is the most dangerous. It produces lots of small wins interrupted by occasional catastrophic losses. Table limits make it physically impossible to "always win back" — after 7-8 losses in a row (which happens more often than people expect), your next bet exceeds the maximum and the strategy breaks.

The honest truth is that if you want to play roulette as entertainment, pick European or French, place a mix of inside and outside bets that you enjoy, and set a session budget. The mathematical outcome is the same regardless of pattern.

Prefer French roulette with La Partage if available. Otherwise European. Never play American online unless there is no alternative — the house edge is almost twice as high for no visible benefit.

Set a session budget and a time limit. Roulette is slower than slots but still easy to overplay.

Live dealer is a premium experience; virtual is more budget-friendly. Try both to see which you prefer.

Ignore all "systems". They redistribute variance, not expected value.