Home Online Calculator College Standard Deviation of Binomial Distribution Online Calculator Standard Deviation of Binomial Distribution Calculator n = n is Number of Trials p = p is Probability of Success q = q is Probability of Failure (1 - p) Solution σ= Std. Deviation of Binomial Distribution Formula σ = √npq σ = Standard Deviation n = number of trials p = probability of success q = probability of failure (q = 1 - p) Previous Article NPV Calculator Next Article Simple Interest Calculator