Average Calculator

Find the mean, median, minimum, maximum, range and total for a list of numbers.

Separate values with commas, spaces or new lines.

Your statistics will appear here.

About the Average Calculator

A list of values can often be summarized by its arithmetic mean, but that single number should still be interpreted alongside the spread of the data. This calculator finds the mean together with supporting totals and counts.

The arithmetic mean is sensitive to extreme values. If one unusually high or low value dominates the result, the median may describe a typical observation more clearly.

How to Use the Average Calculator

  1. Enter all numbers that belong in the same data set.
  2. Check that the values use compatible units and definitions.
  3. Calculate the arithmetic mean, then compare it with the minimum, maximum or median if outliers may matter.
  4. Do not use a simple average when some observations should carry different weights; use a weighted average instead.

How the Calculation Works

Arithmetic mean = sum of all values ÷ number of values. If the data are x₁, x₂, …, xₙ, then mean = (x₁ + x₂ + … + xₙ) ÷ n.

The calculation gives every observation equal weight. A weighted mean uses a separate weight for each value and therefore answers a different question.

Worked example

Average Calculator Worked Example

Average of 12, 15, 18, 25

Add the values: 12 + 15 + 18 + 25 = 70. There are 4 values, so average = 70 ÷ 4 = 17.5.

Result guide

Understanding Your Average Calculator Result

The mean is the balancing point of the data. It does not mean most observations are close to that value, especially when the set is skewed or contains strong outliers.

Before you rely on the answer

Assumptions and Limitations

  • Every entered value belongs to the same comparison set.
  • Each value should carry equal weight.
  • Missing or invalid observations are not silently treated as zero.

Practical tip

Using This Result in Practice

When the average will influence a decision, look at the underlying values as well. A mean of 50 could come from values clustered around 50 or from a mix such as 0 and 100.

Related calculations

Useful Calculations to Continue With

If you want to compare mean with median and mode, use the Mean Median Mode Calculator.

If some values count more than others, use the Weighted Average Calculator instead of a simple mean.

Common questions

Average Calculator FAQ

Is average the same as mean?

In ordinary numerical use, “average” often refers to the arithmetic mean: the sum divided by the count.

Can one outlier change the average a lot?

Yes. Because every value contributes to the sum, a very large or small observation can pull the mean away from most of the data.

Should missing values be entered as zero?

Only if zero is a real observation. A missing value is not automatically the same thing as a measured value of zero.