# Confidence Interval Calculator

## 100% Free online Confidence Interval Calculator. Input your sample data, pick a confidence level, and this calculator will handle the rest automatically.

## About Confidence Interval Calculator

### What is Confidence Interval?

In statistics, a confidence interval is a range of values that are calculated using statistics. This range represents the uncertainty in the estimate of a population parameter. The confidence interval tells us how confident we can be that the true value of the population parameter lies within this range.

### How to use the Confidence Interval Calculator

To use this calculator, simply input the Sample Mean, Sample Size, Standard Deviation and pick a Confidence Level. Then click on calculate. The calculator will automatically calculate and give you an instant result. You will get the lower bound, upper bound, and margin of error.