Roulette Betting Systems Simulator
Can a betting system change the outcome of roulette? From Martingale and Fibonacci to Labouchere and Flat Betting, players have developed numerous ways to manage their stakes. But while these systems change how much you bet, they cannot change the odds of the wheel.
Our free Roulette Betting Systems Simulator lets you explore six popular strategies using European roulette. You can spin the wheel, test consecutive losses or compare all six systems against the same sequence of roulette outcomes.
Choose your starting bankroll, base unit and table maximum to see how each strategy performs when wins, losses and betting limits come into play.
The simulator is designed to help you understand the mathematics and risks behind roulette betting systems – not to predict results or guarantee profits.
Roulette Betting Systems Simulator
Explore six staking systems on European roulette. Simulate spins, test losing streaks, or compare strategies using identical wheel outcomes.
All amounts are currency-neutral units. Bets are always on black, an even-money outside bet. European roulette has 18 black, 18 red and one green zero.
Spin history
Force consecutive losing outcomes to see how quickly the required stake grows. This is a deterministic stress test, not a random wheel simulation.
Loss progression
Every system receives the same sequence of actual roulette numbers. Stopped systems remain stopped; they do not restart or borrow money. This is a simulation, not a prediction.
| System | Final bankroll | Net | Max bet | Max drawdown | Spins played | Status |
|---|---|---|---|---|---|---|
| Run a comparison to see results. | ||||||
How each betting system works
- Martingale: Double after a loss; reset after a win.
- Paroli: Double after a win; reset after a loss or three consecutive wins.
- Fibonacci: Move one position forward after a loss and two back after a win (1, 1, 2, 3, 5…).
- D'Alembert: Add one unit after a loss; subtract one after a win (minimum one unit).
- Labouchere: Start with [1, 2, 3, 4]. Bet the sum of the first and last numbers; add the lost units after a loss, or remove both ends after a win. After clearing the sequence, start a new cycle.
- Flat Betting: Always bet one unit.
Educational simulation only. No betting system changes the house edge. On standard European roulette, black wins 18/37 spins and loses 19/37 (including zero); the house edge is approximately 2.70% of total money wagered. Past outcomes do not influence future spins. No real money is involved.
Understanding the Simulation Results
A betting system can finish with a profit, run out of money or reach the table maximum. None of these outcomes changes the mathematical advantage held by the casino.
The simulator uses European roulette, a single zero and even-money bets on black. Results are shown in currency-neutral units. Bankroll and table limits may stop a strategy before the selected number of spins is completed.
How Roulette Betting Systems Work
Roulette betting systems determine how much you stake after a win or loss. They do not influence where the ball lands.
The Mathematics of a 10-Unit Bet on Black
Martingale Roulette System
The Martingale betting system doubles the stake after every loss and returns to the base unit after a win. The objective is to recover previous losses and make a profit equal to one base unit, provided the next required bet can be placed.
Six Consecutive Losses – Starting With 10 Units
Why Martingale Stops
With a table maximum of 500 units, the next required bet of 640 cannot be placed. The player still has 370 units, but the system cannot continue. In this example, the next bet also exceeds the remaining bankroll.
What this demonstrates: Martingale can produce many small recoveries, but consecutive losses cause the required stake to grow exponentially. A table limit or insufficient bankroll can end the progression before a recovery occurs. The system does not overcome roulette's house edge.
Reverse Martingale (Paroli)
Unlike traditional Martingale, the Reverse Martingale (Paroli) system increases stakes after wins rather than losses. A losing spin resets the stake to the base unit. In our simulator, the progression is also reset after three consecutive wins.
Three Consecutive Wins
What If the Third Spin Loses?
What this demonstrates: Paroli can produce larger gains during consecutive wins, but a single loss can erase the profits accumulated earlier in the progression. Limiting the sequence to three wins prevents unlimited stake escalation, but it does not eliminate risk or overcome the house edge.
Fibonacci Roulette System
The Fibonacci betting system follows a mathematical sequence in which each number is the sum of the previous two: 1, 1, 2, 3, 5, 8, 13 and so on. After a loss, the player moves one step forward. After a win, the player moves two steps back, without going below the first step.
Nine Consecutive Losses – Starting With 10 Units
Why the Progression Stops
With a starting bankroll of 1,000 units and a table maximum of 500 units, the player has only 120 units remaining after nine losses. The next required bet of 550 exceeds both the table maximum and the available bankroll.
What this demonstrates: Fibonacci grows more slowly than Martingale, but consecutive losses still create increasingly large stakes. Unlike Martingale, a win moves the sequence back two steps instead of immediately resetting the stake. The system cannot remove the house edge.
D'Alembert Roulette System
The D'Alembert betting system uses a linear progression. After every loss, the stake increases by one base unit. After every win, it decreases by one base unit, but never falls below the starting stake. Unlike Martingale, the bet does not double after a loss.
A Linear Losing Progression
Slower Growth Does Not Eliminate Risk
After 13 consecutive losses, the total amount lost is:
The next stake of 140 is below the table maximum of 500, but the player has only 90 units remaining. The progression stops because of insufficient bankroll.
What this demonstrates: D'Alembert avoids the exponential increases of Martingale, but losses still accumulate. The slower progression does not guarantee recovery, and the casino's mathematical advantage remains unchanged.
Labouchere Roulette System
The Labouchere betting system, also known as the cancellation system, uses a sequence of numbers to determine each stake. The player adds the first and last numbers together. After a win, those numbers are removed. After a loss, the stake expressed in base units is added to the end of the sequence.
How the Number Sequence Works
If the Bet Wins
If the Bet Loses
What Happens After Repeated Losses?
With a starting bankroll of 1,000 units and a base unit of 10, ten consecutive losses produce the following stakes:
Only 50 units remain. Although the next required bet of 150 is below the table maximum of 500, it exceeds the available bankroll. The progression therefore stops.
What this demonstrates: Labouchere attempts to recover losses through its changing number sequence. Wins shorten the sequence, while losses extend it and increase the required stakes. Once the sequence is cleared, our simulator restarts it at 1–2–3–4. Neither this reset nor the progression changes roulette's house edge.
Flat Betting Roulette System
Flat Betting is the simplest strategy in our simulator. The player uses the same stake on every spin, regardless of whether the previous bet won or lost. Unlike progression systems, Flat Betting does not increase the next stake to recover earlier losses.
The Stake Never Changes
Fixed Stakes, Variable Outcomes
Flat Betting avoids escalating stakes after losses, but the bankroll can still be exhausted. Consider a sequence of 100 consecutive losing spins:
With a starting bankroll of 1,000 units, the player would have nothing left after those 100 losses. The fixed stake limits the amount risked on each individual spin, but not the total potential loss over time.
What this demonstrates: Flat Betting keeps the stake predictable and avoids the rapid increases associated with progression systems. However, wins and losses still follow the probabilities of European roulette, and the house edge remains unchanged.
Comparing the Six Roulette Betting Systems
Each roulette betting system follows different staking rules. The main differences are how quickly stakes increase, how wins affect the progression and when bankroll or table limits prevent further betting. None changes the underlying probability of winning.
Martingale
Double the stake after every loss.
Reverse Martingale
Double after wins; reset after a loss or three wins.
Fibonacci
Advance after losses and move back two steps after wins.
D'Alembert
Increase or decrease by one base unit.
Labouchere
Adjust a number sequence after wins and losses.
Flat Betting
Keep the same stake on every spin.
Frequently Asked Questions
Can a roulette betting system guarantee a profit?
No. Betting systems change the size of individual stakes, not the probabilities of the roulette wheel. Every standard even-money bet on European roulette retains a house edge of approximately 2.70%.
Which roulette betting system is the safest?
No betting system makes roulette risk-free. Flat Betting keeps individual stakes predictable and avoids progressive increases, but it cannot prevent cumulative losses or guarantee that a bankroll will last.
Why do roulette betting systems stop at table limits?
Progression systems may require a stake larger than the casino's table maximum. A system can also stop when the next required stake exceeds the remaining bankroll, even if the player still has money left.
Is European roulette better than American roulette?
European roulette has 37 pockets, including one zero, and a standard house edge of approximately 2.70%. American double-zero roulette has 38 pockets and a standard house edge of approximately 5.26%. European roulette therefore offers better mathematical odds across virtually all standard roulette bets, not just even-money wagers. Certain special bets and table rules may affect the house edge.
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