🎲 2,000 simulated nights, not a promise
Bankroll Survival Simulator
Will $200 survive the night? This runs 2,000 Monte Carlo sessions of your game in your browser — flat-betting until the bankroll busts or doubles — and shows the honest spread: how long the money lasts and how often you actually walk away up.
—median hands until bust
—chance of doubling before busting
—sessions that busted
still in the game (not yet bust)doubled & walked (cumulative)
The approximation, stated: each hand is simulated as an even-money bet with win probability p = (1 − house edge) / 2, which reproduces the game's expected value but simplifies real payout variance (blackjack doubles/splits, slot jackpots are lumpier than this). Edges come from our validated odds dataset (floored at 0.10% so we never imply a winning game). Runs are capped at 20,000 hands. Because every game has a negative edge, the chance of doubling before busting is always under 50% — that asymmetry IS the house edge.
Make it last longer.
Play it smart. This simulator shows expected spreads, not your future. Every game is negative expected value; the house wins over time and no system beats it. Set a budget you can afford to lose. If gambling stops being fun, call or text 1-800-GAMBLER (1-800-426-2537), 24/7.