Average (Mean) Calculator
Calculate the mean, median and mode of a list of numbers instantly by entering your data set, free and easy right in your browser.
Enter Values
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How to use this calculator
- Enter up to five values.
- Press Calculate for the average, sum and count.
How it works
The mean (average) is the sum of the values divided by how many there are.
Worked example
10, 20 and 30. Sum 60 ÷ 3 = 20.
Common mistakes
- Confusing the mean with the median — a few large values pull the mean up.
- Including blank or non-numeric entries in the count.
Frequently asked questions
Is the average the same as the mean?
Yes — 'average' usually means the arithmetic mean: the sum of the values divided by how many there are.
When is the median better than the mean?
When the data has outliers or is skewed — the median (middle value) better reflects the typical value.
Is the average the same as the median?
Not always. The average (mean) divides the total by the count; the median is the middle value. They differ when a few large or small values skew the data — use the median calculator for that.
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Cite this tool
Zerdly. (2026). Average (Mean) Calculator. Retrieved from https://www.zerdly.com/tools/average-calculator/
Tip: Enter any known values to calculate the remaining results.
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