Blackjack Card Counting Bankroll Calculator
This tool applies classic bankroll-management math (based on edge, standard deviation per hand, and average bet size) to estimate your risk of ruin and a recommended bankroll for a given strategy edge. It's intended for statistical/educational analysis of variance in betting strategies, not for real-money wagering advice.
About this calculator
Estimate risk of ruin and recommended bankroll size for advantage-play bankroll management based on bet spread, edge, and bet size — for educational strategy analysis only.
Frequently Asked Questions
What is risk of ruin?
Risk of ruin is the statistical probability of losing your entire bankroll before your long-run edge (if any) plays out, based on variance and bet sizing.
Is this calculator for gambling advice?
No. This tool is provided for educational and statistical analysis of variance and bankroll math only, not as advice to wager real money.
What standard deviation should I use?
For many even-money strategy games, standard deviation per hand is often estimated between 1.1 and 1.3 bet units, but this varies by game and strategy.