Average calculator
Paste your numbers to get the mean (average), median, sum, count, minimum, and maximum — all calculated in your browser.
Quick answer
The average (mean) is the sum of the numbers divided by how many there are: mean = sum ÷ count. For 4, 8, 15 the mean is 27 ÷ 3 = 9. This tool also shows median, sum, min, and max — paste your numbers below.
Average (mean)
18
Median
15.5
Sum
108
Frequently asked questions
How do I calculate an average (mean)?
Add all the numbers together, then divide by how many there are. Mean = sum ÷ count. For 4, 8, and 15, the sum is 27 and the count is 3, so the mean is 9.
What is the difference between mean and median?
The mean is the sum divided by the count. The median is the middle value when the numbers are sorted (or the average of the two middle values). The median is less affected by outliers.
How do I enter the numbers?
Separate them with commas, spaces, or new lines — for example "10, 20, 30" or one number per line. Non-numbers are ignored.
Is my data uploaded?
No. TryCalculatingNow computes in your browser. Your numbers are not uploaded to our servers for processing.