Average Calculator
Paste numbers — mean, median, and the outlier-catchers, live.
How this is calculated
mean = sum ÷ count · median = middle value of the sorted list
Worked example: 72, 85, 91, 64, 78, 88 → sum 478, count 6, mean 79.67, median 81.5. When mean and median sit close, the data is balanced; when they diverge, an outlier is pulling — the min/max line points straight at it. That one comparison is most of practical statistics.
Frequently asked questions
How is the average calculated?
Add every number and divide by how many there are — the arithmetic mean. Paste or type values separated by commas, spaces, or new lines; anything that isn’t a number is ignored rather than breaking the result.
What is the difference between mean and median?
The mean is the balanced total; the median is the middle value when sorted. One extreme number drags the mean but barely moves the median — which is why house prices are reported as medians. This page shows both, plus min and max, so outliers reveal themselves.
How do I average percentages or marks?
If each mark is out of the same total, average them directly. If they carry different weights (a 20% test and an 80% exam), a plain average misleads — multiply each by its weight first. A dedicated weighted-average mode is on the roadmap.
How many numbers can I paste?
Hundreds are fine — the math is instant in your browser. The count line always shows how many values were read, so a paste that dropped a line is immediately visible.