The Average Calculator finds the arithmetic mean of a group of numbers. The mean is one of the most common ways to describe the center of a data set. It is useful for schoolwork, basic statistics, test scores, measurements, and everyday comparisons.
Average Formula
The arithmetic mean is calculated by adding all observations and dividing the total by the number of observations: Average = Sum of Values Γ· Number of Values.
How to Use the Calculator
- Enter the numbers that belong to the data set.
- Make sure each value should be included in the same calculation.
- Run the calculator.
- Review the average shown in the result.
Example
For the values 12, 15, 18, and 19, the sum is 64. There are four values, so the average is 64 Γ· 4 = 16.
What the Average Tells You
The mean gives one representative value for the data set, but it can be affected by unusually large or small observations. For example, a single extreme value can pull the average away from where most observations are located. When that matters, the median may provide a useful additional description.