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
How it works: Add up all the values and divide by the count of values to find the arithmetic mean.
Review and Methodology
This calculator runs locally in your browser. Inputs are converted into the units required by the formula, and the result is paired with supporting references so you can verify the method before using it for planning or estimates.
Worked Example
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.
Can I embed this Average Calculator on my website?
Yes. Click the "Embed" button at the top of this page to customize the size, colors, and theme, then copy the iframe code. Paste it into any HTML page, WordPress site, or CMS. It is completely free, requires no signup, and works on all devices. You can also visit our embed guide at calculory.com/services/embed-calculators for more details.
AI Assistant
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I can help you understand the average calculator formula, interpret your results, and answer follow-up questions.
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