Find the mean, median and range of a list of numbers.
Try an example
Load a ready-made sample into this tool and run it. Every result you see is calculated live by the tool itself — nothing here is a pre-written answer.
Sample: input: 12, 18, 24, 30
How to Use
- Enter numbers separated by commas or line breaks.
- Click Run.
- Read the mean, median, count and range.
What this average calculator does
This average calculator takes a list of numbers and reports the mean, median, count and range in one pass. Paste or type the values separated by commas or line breaks — a column copied from a spreadsheet works fine. It suits quick jobs like averaging test scores, prices, temperatures or daily measurements, where you want the typical value and a sense of how spread out the numbers are.
Mean, median and range explained
The mean adds all the values together and divides by how many there are. The median is the middle value once the list is sorted, so a few very large or very small numbers influence it less than they influence the mean. The range is the gap between the smallest and largest values, showing the spread of the list at a glance.
Good to know
Entries that are not numbers are ignored, and the calculator tells you so rather than silently guessing. The count it reports is the number of values actually used, so check it against how many you expected — a missed separator can merge two values into one long number and quietly change the result.
Frequently asked questions
How do I enter the numbers?
Type or paste them separated by commas or line breaks; both work, and decimals are fine. Anything that is not a number is ignored, and the result reports how many values were used.
When should I use the median instead of the mean?
Use the median when a few extreme values would drag the mean away from the typical case — house prices on a street with one mansion, for example. The median stays at the middle value.
What does the range tell me?
It is the largest value minus the smallest: a quick spread check. Two lists can share a mean while one is tightly grouped and the other scattered, and the range exposes that difference.
How to use Average Calculator
- Enter numbers separated by commas or line breaks.
- Click Run.
- Read the mean, median, count and range.
Limitations
Mean is the sum divided by the count; median is the middle value when sorted. Non-numbers are ignored with a note.