Variance Calculator

Estimate volatility over a number of hands: expected profit, 95% confidence range, chance of loss and risk of ruin.

Win rate (bb/100)Standard deviation (bb/100)Typical: 80–110 for cash Hold'emNumber of handsBankroll (bb)For risk of ruin calculation

5,000

Expected profit (bb)

3,162

Standard deviation (bb)

‎-1,198 ↔ 11,198

95% confidence interval (bb)

5.7%

Probability of overall loss

5.0%

Risk of ruin

In 95% of cases the result over 100,000 hands will fall between ‎-1,198 and 11,198 big blinds. The risk of ruin calculation assumes a constant win rate and an infinite horizon.