Confidence Interval Calculator Statistics Instruction: Calculate the confidence interval value by putting the figures of Significance Level (α), Standard Deviation (σ), and Sample Size (N). Tags: Confidence interval, Confidence Interval calculation excel, Confidence Interval Calculator, Confidence interval statistics You Might Also Like Percentile Calculator For Ungrouped Data September 2, 2021 Calculate Standard Deviation in Excel Using Sample Data September 10, 2021 Z Score Calculator September 19, 2021