Roulette calculators

Roulette calculators and simulators for European, American and French wheels: odds and payouts for every bet, plus a play-money table and a system tester.

Roulette CalculatorRoulette calculator for every bet: payout, real chance of winning and house edge on European and American wheels, plus the cost of a session.
Martingale CalculatorMartingale calculator: see how many losses in a row your bankroll and the table limit can take, and how likely a bust is before you reach your goal.
Roulette SimulatorRoulette simulator with play money: spin a single-zero or double-zero wheel, place real table bets, and test Martingale and other systems over thousands of spins.
French Roulette CalculatorFrench roulette calculator: payouts, chances and house edge for every bet, including Voisins, Tiers, Orphelins, Jeu Zéro, La Partage and En Prison.
Betting Systems SimulatorBetting systems simulator: test Martingale, Labouchere, Fibonacci, D'Alembert, Paroli and Oscar's Grind over thousands of sessions and see how often each one goes bust.
Roulette Wheel & Table ChartRoulette wheel and table chart: the number order on European and American wheels, the colours, the table layout and what every bet pays, plus a free odds calculator.

Roulette odds in one minute

Almost every bet on a wheel carries the same house edge. It's the wheel that changes it, not the bet.

Wheel	House edge	Even-money bet wins
European, single zero	2.70%	48.65%
French, La Partage	1.35%	48.65%, half back on zero
American, double zero	5.26%	47.37%

Which tool do you need?

The roulette calculator prices one bet. The simulator gives you a wheel and table with play money. The betting systems simulator shows what Martingale and the rest really do over thousands of spins: the edge stays put.