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Statistics Calculator — Mean, Median, Mode, SD

Descriptive statistics — mean, median, mode, range, variance, SD, quartiles (sample & population). Client-side; data never leaves your device.

Free No signup Client-side Privacy friendly Updated

How to use

  1. 1 Paste or type your numbers, separated by commas or spaces.
  2. 2 All descriptive statistics update instantly.
  3. 3 Both sample and population standard deviation/variance are shown.

Why use this tool

  • Mean, median, mode, range, variance, standard deviation and quartiles in one place.
  • Distinguishes sample (n−1) from population (n) measures.
  • Runs entirely in your browser — your data never leaves your device.

Frequently asked questions

What is the difference between sample and population standard deviation?

Population SD divides by n; sample SD divides by n−1 (Bessel’s correction) to give an unbiased estimate from a sample.

What is the median?

The middle value when the data is sorted. With an even count it is the average of the two middle values.

How are quartiles calculated?

Q1 and Q3 use linear interpolation between the sorted data points at the 25th and 75th percentiles.

Can there be more than one mode?

Yes — if several values tie for the highest frequency, all of them are listed. If every value is unique, the mode is “none”.

What is Statistics Calculator?

A statistics calculator computes descriptive statistics — mean, median, mode, range, variance, standard deviation and quartiles — for a set of numbers, distinguishing sample from population measures.

Features

Full descriptive summary

Mean, median, mode, min, max, range, sum, and count in one pass.

Multi-modal aware

Reports every value tied for the highest frequency, not just one mode.

Free & private

Runs on your device — your data is never uploaded.

Example

Input

2, 4, 4, 5, 10

Output

mean = 5 · median = 4 · mode = 4

Common use cases

  1. 1

    Summarize a data set

    Get the central-tendency and spread measures for a list of numbers.

  2. 2

    Check homework

    Verify mean, median, and mode calculations.

  3. 3

    Quick data sense

    See the range and average of measurements at a glance.

Summary

Zerethon's statistics calculator reports descriptive statistics for a data set in your browser — count, sum, mean, median, mode, minimum, maximum, and range. It handles multi-modal data (all values tied for most frequent). Everything runs client-side — nothing is uploaded.

Category
Math
Pricing
Free
Privacy
Browser-based
Signup
Not required

References

Privacy

Your data never leaves your browser unless explicitly stated. Statistics Calculator runs entirely client-side — no server upload, no logging, no tracking of your input.

Compare

Mean vs Median Permutation vs Combination

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