Average Calculator
The Average Calculator (arithmetic mean) adds every number you enter and divides by how many there are. It also reports the total and the count — everything you need for a set of numbers.
What this means
The average (mean) is one number that summarizes a whole set — the point at which the total would balance if it were spread evenly across all values. For [2, 4, 6], the average is 4.
How we calculate it
Formula
Average = (x₁ + x₂ + … + xₙ) ÷ n, where n is the count of numbers.Worked example
Scores of 2, 4, 6, 8:
- 1Sum = 2 + 4 + 6 + 8 = 20
- 2Count = 4
- 3Average = 20 ÷ 4 = 5
Important assumptions
- Empty values and non-numeric text are ignored.
Frequently asked questions
What is the difference between mean and average?
For everyday use they are the same: the sum divided by the count.
How do I average percentages?
Add them and divide by the count — but if the percentages come from different-size totals, a weighted average is more accurate.
Related tools
Weighted Average Calculator
Compute an average where some values matter more than others.
Percentage Difference Calculator
Compare two numbers as a percent difference based on their average.
Percentage Calculator
Percentage of a number, what percent one value is of another, and percentage change.
Percentage Decrease Calculator
Calculate the percent drop between two values, or the increase if it rose.
Percentage Increase Calculator
Find the percent increase between two values and the amount added.
Standard Deviation Calculator
Measure how spread out your numbers are, population or sample.