What is the Statistics Calculator?

Calculate descriptive statistics from any data set with this free online statistics calculator. Enter numbers and instantly get mean, median, mode, standard deviation, variance, quartiles, range, and more — with formulas and step-by-step work. Runs entirely in your browser with no signup.

How to use the Statistics Calculator

Enter your data set (comma, space, or newline separated).
Click Calculate.
Review mean, median, mode, SD, variance, quartiles, and range.
Follow the formula steps for mean and variance.
Copy the full summary with all statistics.

Common use cases

Finding mean and SD for test scores: 72, 85, 90, 68, 95
Computing median and IQR for a small survey data set
Checking variance and range for experiment measurements

Frequently asked questions

What statistics are calculated?: Count, sum, mean, median, mode, min, max, range, Q1, Q3, IQR, population and sample variance, and population and sample standard deviation.
What is the difference between population and sample SD?: Population SD (σ) divides by n. Sample SD (s) divides by n−1 (Bessel's correction) and is used when your data is a sample from a larger population.
How are quartiles computed?: Q1 and Q3 use linear interpolation on the sorted data (25th and 75th percentiles). IQR = Q3 − Q1.
How many data points can I enter?: Up to 10,000 numbers per calculation.

More Mathematical Tools

Frequently asked questions

What statistics are calculated?

Count, sum, mean, median, mode, min, max, range, Q1, Q3, IQR, population and sample variance, and population and sample standard deviation.

What is the difference between population and sample SD?

Population SD (σ) divides by n. Sample SD (s) divides by n−1 (Bessel's correction) and is used when your data is a sample from a larger population.

How are quartiles computed?

Q1 and Q3 use linear interpolation on the sorted data (25th and 75th percentiles). IQR = Q3 − Q1.

How many data points can I enter?

Up to 10,000 numbers per calculation.