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Martingale calculator
- Bankroll needed
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- Size of final bet
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- Losses your bankroll survives
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For illustration only. Results are mathematical estimates, not guarantees. Gamble responsibly — 21+.
How to use this calculator
Enter your base bet, multiplier and the losing streak you want to survive. The table shows how quickly the required stakes grow — a clear illustration of why doubling up is risky.
Frequently asked questions
Is this calculator free?
Yes, all our tools are free to use.
Can a calculator help me beat the house?
No. Calculators help you understand value and risk, but the house edge always applies.