Martingale system
The martingale betting system doubles your bet after every loss – here is what that really does to your chips, step by step.
How the martingale system works
The martingale system is one of the oldest betting plans in roulette. It uses even-money bets like red or black, odd or even, and high or low, which pay 1 to 1.
- Pick a small base bet, for example one chip on red.
- If you lose, double your bet on the next spin.
- Keep doubling after every loss.
- When you win, go back to the base bet and start over.
The idea is simple: one win pays back all the losses in the streak, plus one base bet of profit.
Martingale changes the size of your bets, not the odds of the wheel. Every spin is still a fresh spin.
A losing streak, step by step
Here is what the bets look like when red misses again and again. The base bet is one chip.
- Spin one: bet one chip – lose.
- Spin two: bet two chips – lose.
- Spin three: bet four chips – lose.
- Spin four: bet eight chips – lose.
- Spin five: bet sixteen chips – lose.
- Spin six: bet thirty-two chips – lose.
- Spin seven: bet sixty-four chips – lose.
- Spin eight: bet one hundred twenty-eight chips.
After seven losses you have already lost one hundred twenty-seven chips. To win back those chips, plus one chip of profit, you must now risk one hundred twenty-eight more.
The bet grows fast, but the prize at the end is always the same: one base bet.
Why it wins small often and loses big rarely
On a European wheel, red comes up with a chance of 48.65% on each spin. So most short sessions end with a red soon enough, and you collect your small profit.
But long streaks of losses do happen. When one hits, it can wipe out many sessions of small wins at once.
- Often: you win one base bet.
- Rarely: you lose a huge doubled stack.
- Over time: the casino keeps its edge of 2.70% on every chip you bet.
That edge means you lose a small part of everything you bet, on average. Martingale does not remove the zero, so it cannot remove the edge. On an American wheel with two zeros the edge is 5.26%, which is worse.
A plan that wins most sessions can still lose money overall. Look at the total result, not how often you won.
The table maximum and your bankroll
Two walls stop every martingale streak.
- Table maximum: every roulette table has a highest allowed bet. Once your doubled bet would go past it, you cannot double anymore, and the plan breaks.
- Bankroll: your chips run out. Each new step needs as many chips as all the steps before it combined, plus one base bet.
When you hit either wall, you are left with the full loss of the streak and no way to win it back with one bet.
You can read more about bet limits and even-money bets on the roulette rules and payouts pages.
Grand Martingale and Reverse Martingale
Players have made a few changes to the classic plan. None of them removes the house edge.
- Grand Martingale: after a loss, you double the bet and add one more base bet. A win gives a bigger profit, but the bets grow even faster, so you reach the table maximum or run out of chips sooner.
- Reverse Martingale: you double after a win and go back to the base bet after a loss. Your losses stay small, but one loss takes back the whole winning run. Many players stop after a set number of wins in a row.
Both versions only change when you win and lose big. The 2.70% edge on a European wheel stays the same on every bet.
Changing bet sizes moves money around in time. It never changes what the wheel pays.
Run Martingale in the tester
The tester above this text is already set to Martingale. Press run and watch what happens to the bets and the balance.
- Look for the long rises made of small wins.
- Look for the sudden big drops when a losing streak hits.
- Try a lower table maximum or a smaller bankroll and see how much sooner the drop comes.
- Switch the wheel type to compare European and American results.
It works like a free martingale calculator: no money, just play chips. You can also try other plans in the system tester.
Questions
Does the martingale strategy work in roulette?
No. It wins small amounts often but loses large amounts when a long losing streak hits, and the house edge of 2.70% on a European wheel stays the same on every bet.
What is the reverse martingale?
In the reverse martingale you double your bet after a win and go back to the base bet after a loss. It keeps losses small, but one loss takes back the whole winning run, and the house edge stays the same.
What stops the martingale system?
The table maximum and your bankroll. Once you cannot double the next bet, the full loss of the streak stays lost.
Is there a free martingale calculator?
Yes, the tester on this page is set to Martingale. It shows each doubled bet and your balance spin by spin with play chips only.
What is the chance of red on each spin?
On a European wheel the chance of red is 48.65% on every spin, no matter what came before. Past results do not make red more likely.