Confidence Calculator

Confidence Interval Calculator

Calculate the confidence interval for a population mean by providing sample data and a confidence level.

Confidence Level 70% Confidence 75% Confidence 80% Confidence 85% Confidence 90% Confidence 95% Confidence (Most Common) 99% Confidence 99.5% Confidence 99.9% Confidence

Sample Mean (x̄)

Sample Standard Deviation (s)

Sample Size (n)

Calculating...

x̄ = , % CL

[, ]

You can be % confident that the population mean (μ) falls between and .

Lower Bound
Upper Bound
Margin of Error (E)