Poker Bankroll Calculator: Risk of Ruin, Formula and Buy-In Tables
A poker bankroll calculator estimates the probability that a player’s funds reach zero at some point over an indefinite playing horizon, based on a fixed win rate, standard deviation, and starting balance. Under the classic fixed-stakes model used here, a player with a win rate of 5 big blinds per 100 hands, a standard deviation of 90 big blinds per 100 hands, and a balance of 20 buy-ins faces a risk of ruin of about 8.5 percent. Increasing the balance to 25 buy-ins reduces this theoretical probability to about 4.6 percent. This model assumes that stakes remain fixed, no additional funds are deposited or withdrawn, and performance parameters stay constant over an indefinite timeline. ...