Calculator to compute the confidence interval or margin of error of a sample based on the desired confidence level. It also provides an error bar diagram.

The confidence interval calculator finds the confidence level for your data sample.

Read Confidence Intervals to learn more. Use the Standard Deviation Calculator to calculate your sample's standard deviation and mean. Caution: you should really use the standard deviation of the …

Free online confidence interval calculator for statistical analysis. Calculate confidence intervals for means, proportions, and more with our easy-to-use tool.

This confidence interval calculator finds the confidence interval for the mean. Enter several summary values and choose the method.

Calculate 90%, 95%, or 99% confidence intervals instantly. Input sample mean, SD, and size to get accurate bounds, margin of error, and interpretation. Perfect for researchers & students!

Easily calculate confidence intervals with our online Confidence Limit Calculator. Accurate results for mean, sample size, and confidence level.

The Confidence Interval Calculator allows you to compute the confidence interval of a mean by providing the standard deviation, mean, and sample size. Alternatively, if you don’t know the aforementioned …

A confidence interval is made up of two parts, the point estimate and the margin of error. The point estimate is simply the sample statistic corresponding to the population parameter of interest.

An easy confidence interval calculator using a Z statistic to estimate a population mean from a single sample. Provides full details of workings.