Average / Mean Calculator
Calculate mean, median, mode and range. Free online average calculator — enter numbers separated by commas.
How to Use
- Enter your numbers separated by commas (e.g. 10, 20, 30, 40).
- You can enter as many numbers as you like — there is no limit.
- Click Calculate to get mean, median, mode, range, sum, and count.
Formula
Mean = Sum of all values ÷ Count of values
Median = Middle value when values are sorted (or average of two middle values)
Mode = Value that appears most frequently
Range = Maximum value − Minimum value
Example Calculation
Example: Numbers — 5, 10, 15, 20, 25
| Measure | Value |
|---|---|
| Numbers | 5, 10, 15, 20, 25 |
| Sum | 75 |
| Count | 5 |
| Mean | 15 |
| Median | 15 |
| Range | 20 |
Frequently Asked Questions
Mean = arithmetic average. Median = middle value when sorted (less affected by outliers). Mode = most frequent value. For symmetric distributions, all three are equal.
Use median when your data has outliers (extreme values). Example: Average salary in a company with one very high-paid CEO — median gives a more representative figure.
If every number appears the same number of times, there is no mode. If multiple values appear the same number of times, all are modes (multimodal distribution).
Standard deviation measures how spread out the values are from the mean. Low SD means values are clustered close to the mean. High SD means values are spread widely.
Sort the numbers and average the two middle values. Example: {2, 5, 8, 10} — median = (5+8)/2 = 6.5.