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Average Calculator

Use this free online average calculator to find the arithmetic mean of any set of numbers. Enter your values separated by commas and get the result instantly.

Average Calculator

Add numbers to find the arithmetic mean

Add at least one number to see results.

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Formula

Average = Sum of all values / Number of values

Add up all the values and divide by the count of values to find the arithmetic mean.

Worked Example

Find the average of 10, 20, 30, 40, 50 Step 1: Sum → 10 + 20 + 30 + 40 + 50 = 150 Step 2: Count → 5 values Step 3: Average → 150 / 5 = 30 Result: 30

What Is an Average?

An average (also called the arithmetic mean) is the most common measure of central tendency. It represents the "typical" value in a dataset by distributing the total equally among all values. Averages are used everywhere, from calculating grades to analyzing financial data.

The average of 10, 20, and 30 is 20, because (10+20+30)/3 = 20
Averages can be decimals even when all input values are whole numbers
Extreme outliers can significantly shift the average, making it misleading for skewed data
For skewed data, the median (middle value) is often a better measure of the "typical" value

Averages are fundamental in statistics, education (grade calculation), sports (batting averages), economics (average income), and science (experimental measurements).

You can also calculate changes using our Mean Median Mode Calculator or Standard Deviation Calculator.

Frequently Asked Questions

What is the difference between mean and average?

In everyday use they are the same. The arithmetic mean is the most common type of average. There are other types of averages, such as the weighted mean, geometric mean, and harmonic mean, but "average" usually refers to the arithmetic mean.

When is the average misleading?

When data has extreme outliers. For example, if five people earn $50K and one earns $10M, the average income is $1.7M, which does not represent any individual. The median ($50K) is a better measure here.

Can the average be a decimal?

Yes. The average of 1 and 2 is 1.5 even though both inputs are whole numbers. This is perfectly normal and expected.

How do I calculate a weighted average?

Multiply each value by its weight, sum the products, then divide by the total weight. For example, if exam (weight 3) = 80 and homework (weight 1) = 90, weighted average = (80x3 + 90x1) / (3+1) = 82.5.

What is the average used for in school?

Teachers use averages to calculate final grades from individual assignment scores. Your GPA is a weighted average of all your course grades, where each course is weighted by its credit hours.

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