Mean, Median and Standard Deviation Explained
The core statistics everyone should know — mean, median, mode, range and standard deviation — what each tells you, when averages mislead, and how the normal distribution ties them together.
Average Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Average (mean)
30.00
- Count
- 5
- Sum
- 150.00
- Median
- 30.00
- Minimum
- 10.00
- Maximum
- 50.00
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Average Calculator
The Average Calculator works out your average (mean), along with 5 related figures in an instant. Enter numbers (comma or space separated) and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the numbers (comma or space separated).
- Read off your average (mean), together with count, sum and median — the calculator updates automatically, with no button to press.
Worked example
For example, with numbers (comma or space separated) of 10, 20, 30, 40, 50, the average (mean) is 30.00.
| Numbers (comma or space separated) | 10, 20, 30, 40, 50 |
|---|
| Average (mean) | 30.00 |
|---|---|
| Count | 5 |
| Sum | 150.00 |
| Median | 30.00 |
| Minimum | 10.00 |
| Maximum | 50.00 |
Results are estimates for educational use, not professional advice.
Key terms explained
- Median
- The middle value of a sorted set of numbers, less affected by outliers than the mean.
- Mean
- The average of a set of numbers — their sum divided by how many there are.
Frequently asked questions
Add all the numbers together and divide by how many there are. This calculator does it instantly and also shows the sum, count, median and range for the same list.
The mean is the sum divided by the count. The median is the middle value when the numbers are sorted. The median is less affected by very large or very small outliers.
Type your values separated by commas, spaces or new lines — for example 10, 20, 30. The calculator ignores anything that is not a number.
Yes. The calculator accepts decimals and negative values and treats them correctly in the mean, sum, median and range.
Related guides
How to Calculate Average: Formula, Steps & Examples
Learn how to calculate Average — the formula explained step by step, with worked examples and a free calculator to check your answer.