Average Calculator

Enter two or more numbers separated by commas, spaces, or line breaks. The calculator adds the values and divides by the number of values.

The arithmetic mean is sensitive to unusually high or low values. When a data set is skewed, the median can describe the center differently.

Ethan records scores of 10, 20, and 30. Their sum is 60 and there are three values, so the arithmetic mean is 60 ÷ 3 = 20.

A zero is included as a value; a blank entry is not. If the scores carry different weights, calculate a weighted average separately rather than giving every score equal importance.

The numbers 10, 20 and 30 have a sum of 60 and an average of 20. Commas, spaces and line breaks separate entries in this calculator.

Enter 1000 as 1000, not 1,000: the comma is treated as a separator. Each entry has equal weight; this tool does not calculate a weighted average.

For 10, 20 and 300, the mean is 330 ÷ 3 = 110. The median is 20. The high value pulls the mean upward, so the most useful summary depends on what you want to describe.

This is an arithmetic-mean calculator. Each entered number has equal weight, and zero counts as a value. A weighted average needs the corresponding weights; a blank entry is not a zero observation.