Average Calculator
Enter a list of numbers to instantly calculate the average (mean), median, sum, count, and range.
Average (mean)
18.00
What Your Result Means
The mean (average) adds up all your numbers and divides by how many there are. The median is the middle value when your numbers are sorted - useful when a few extreme values might skew the mean.
How It Is Calculated
Mean = Sum of all numbers / Count of numbers
Median is found by sorting all numbers and taking the middle value (or averaging the two middle values if there's an even count).
Worked Example
For the numbers 4, 8, 15, 16, 23, 42: the sum is 108, the mean is 108 / 6 = 18, and the median (average of the two middle sorted values, 15 and 16) is 15.5.
Important Assumptions
- Non-numeric entries are ignored automatically.
- Numbers can be separated by commas, spaces, or line breaks.
Frequently Asked Questions
- When should I use median instead of mean?
- Use median when your data has outliers - like a few very high or low values - since the median isn't affected by extreme numbers the way the mean is.
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Methodology
This calculator uses standard statistical formulas for mean and median. See our methodology page for details.
This calculator provides estimates for general informational purposes only and should not be relied upon as the sole basis for any decision.