Statistics Calculators

Free online statistics calculators. Enter your data set and get instant results for mean, median, standard deviation, and more.

Find the arithmetic mean of any data set.

Find the middle value of a sorted data set.

Find the most frequent value(s) in a data set.

Calculate the range (max minus min) of a data set.

Calculate population and sample standard deviation.

Find the variance of a population or sample.

Calculate the z-score of a value in a distribution.

Find the percentile rank of a value in a data set.

Calculate Q1, Q2, Q3 quartiles of a data set.

Calculate the IQR (Q3 - Q1) of a data set.

Find the relative error between observed and true values.

Calculate the mean absolute deviation of a data set.

Calculate margin of error for surveys and polls.

Calculate basic probability of events.

Calculate the weighted average of values with different weights.

Compute expected value and variance from a discrete probability distribution.

Calculate probabilities for a normal distribution.

Calculate binomial probability P(X=k).

Calculate confidence interval for a population mean.