Martingale Ruin Calculator

What is the Martingale Strategy?

The Martingale is the most famous betting system. Double your bet after every loss, and one win recovers all losses.

Why Martingale Leads to Ruin

Mathematically, Martingale is a system where you "almost certainly win small, but occasionally lose everything." Bet sizes grow exponentially with consecutive losses:

• 1 loss: $10 → 2: $20 → 3: $40 → 4: $80 → 5: $160
• 7 losses = 128× base bet, 10 losses = 1024× base bet
• Roulette red/black is 48.65% (due to 0) — 7-loss streak probability ≈ 1.3%

The Table Limit Trap

Every casino has table limits. With a $10 min / $5,000 max, a 9-loss streak ($5,120 needed) forces a reset. You've lost $5,110 with no way to recover.