providing accurate calculations for 18+ years!
Calculator: Binomial Probability Confidence Interval
Binomial Probability Confidence Interval Calculator
This calculator will compute the 99%, 95%, and 90% confidence intervals for a binomial probability, given the number of successes and the total number of trials. This calculator relies on the Clopper-Pearson (exact) method.
Please enter the necessary parameter values, and then click 'Calculate'.