Martingale Simulator

The starting stake of each sequence. Every loss doubles the next bet — 10, 20, 40, ... — until a win resets it to this base.

The chance of winning one even-money round. 48.65% matches red/black on a European wheel; use 47.37% for an American wheel.

How many consecutive losses you can double through before the table limit or your bankroll stops the progression. Each extra doubling doubles the worst-case amount at risk.

How many complete win-or-bust sequences you plan to play. The more sequences, the likelier you hit the fatal losing streak at least once.