Free tool · simulator
Martingale risk simulator
Test the Martingale doubling system on roulette 5,000 times, with your stake, budget and the table limit, and see what really happens.
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Wheel
Sessions that ended in profit
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Press run to test the system 5,000 times.
Typical win–
Typical loss–
Hit the limit–
Average result–
The Martingale doubles your stake after every loss on red or black, hoping one win recovers everything.
The doubling ladder
How the stakes grow in a losing run from your starting stake:
| Loss in a row | Next stake | Lost so far | Win if the next bet wins |
|---|
Why it doesn’t beat the casino
Most sessions end with a small win, which makes the system feel safe. But every so often a losing run hits your budget or the table limit, and that one loss wipes out many small wins. Every bet still carries the house edge, so the average result is always negative.
Questions
How often do eight losses in a row happen on red?
On a European wheel, about once in every 200 attempts. Over a long session that’s more likely than it sounds.
Does any betting system work?
No. Systems change the pattern of wins and losses, but not the house edge, so the long-run average stays the same.
Our short video guide explains the idea behind this tool, step by step.
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18+ only. Please gamble responsibly. These tools show averages and examples. They can’t predict a single session, and no tool or system can beat the house edge. Set a budget and a time limit before you play. For free, confidential support, visit BeGambleAware.org or call the National Gambling Helpline on 0808 8020 133.