Mean Calculator

Calculate the mean (average), count, and sum of any set of numbers instantly.

3.8M usesUpdated · 2026-04-23Runs locally · zero upload

How to use

  1. Type or paste your numbers into the input field.
  2. Separate them with commas, spaces, or semicolons.
  3. Mean, count, and sum update instantly.

Formula

$$\bar{x} = \frac{\sum_{i=1}^{n} x_i}{n}$$

Where n is the count of values and $x_i$ are the individual values.

Example

For the numbers 4, 8, 15, 16, 23, 42:

  • Sum = 108
  • Count = 6
  • Mean = 108 / 6 = 18

Frequently asked questions about Mean Calculator

What is the arithmetic mean?

The arithmetic mean is the sum of all values divided by the number of values. It is the most common measure of central tendency.

How do I enter the numbers?

Separate numbers with commas, spaces, or semicolons. For example, "4, 8, 15, 16, 23, 42" or "1 2 3 4 5".

Can I enter negative numbers or decimals?

Yes. Enter them as -5 or 3.14 and the calculator handles them correctly.