What is the average (arithmetic mean)?
The arithmetic average (or mean) is the sum of a set of numbers divided by the count of values. It provides a simple central value that represents the dataset.
How to calculate average — formula
Formula: Average = (Sum of numbers) ÷ (Number of values).
Example: Numbers: 12, 15, 20, 10 Sum = 12 + 15 + 20 + 10 = 57 Count = 4 Average = 57 ÷ 4 = 14.25
How to use the Average Calculator
- Enter numbers separated by commas, spaces, or new lines.
- Empty entries and text are ignored; only valid numbers are used in the result.
- Click Calculate to see Sum, Count, and Average.
- Use Clear to reset inputs.
When to use the average (and when not)
Use the arithmetic average for fairly symmetric datasets (e.g., test scores, daily temperatures). Avoid using the mean when the distribution has extreme outliers — the median may be a better measure in that case.
Benefits of our Average Calculator
- Quick: Instant results in your browser (no signup).
- Responsive: Works on mobile, tablet, and desktop.
- Accurate: Ignores invalid fields and calculates with proper numeric parsing.
- Convenient: Paste a list of values or type them directly.
Frequently asked questions
Can I paste numbers in any format?
Yes. You can paste numbers separated by commas, spaces, semicolons, or new lines. The calculator parses common numeric formats like 1000 or 1,000.50.
What happens with invalid entries?
Invalid values (text or non-numeric strings) are ignored. The calculator reports the number of valid entries used to compute the average.
Does it work on mobile?
Yes — the calculator and this article are fully responsive and tested on phones and tablets.