Statistics Calculator

Calculate mean, median, mode, standard deviation, variance, and more from a list of numbers.

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How it works

Paste or type a list of numbers separated by commas, spaces, or newlines. The tool parses every valid number and computes descriptive statistics entirely in your browser: arithmetic mean, median (middle value after sorting), mode (most frequent), range, variance (average squared deviation from the mean), and population standard deviation. Quartiles Q1 and Q3 are computed using the inclusive method. No data leaves your device.


              σ = √(Σ(xᵢ − μ)² / N)

Common use cases

  • Summarising a dataset from a class, survey, or experiment.
  • Checking spread and central tendency before running a bigger analysis.
  • Quickly finding the median or mode of a small list without opening a spreadsheet.

Frequently asked questions

What separator can I use between numbers?

Any combination of commas, spaces, tabs, or newlines works. The tool strips non-numeric characters and parses whatever remains.

Is this population or sample standard deviation?

Population standard deviation (divides by N). For sample standard deviation (divides by N−1) multiply the variance by N/(N−1) and take the square root.

What if a number appears more than once as the mode?

All tied most-frequent values are shown as the mode.