Average Calculator
Find the mean, median, mode, sum and range of a list of numbers instantly.
Last updated: August 2026
Comma-separated values, e.g. 5, 10, 15, 20.
Mean
12.5
Median
12.5
Mode(s)
none
Sum
50
Count: 4 · Min: 5 · Max: 20
The mean is the sum of all values divided by the count. The median is the middle value when sorted, and the mode is the most frequent value.
How it works
Mean = Σ ÷ count. Median = middle of sorted values. Mode = most frequent value.
Example: [5, 10, 15, 20] → mean 12.5, median 12.5.
Frequently Asked Questions
What is the difference between mean, median and mode?
Mean is the sum divided by the count. Median is the middle value when sorted. Mode is the most frequent value. For skewed data they can differ a lot.
How do I find the median of an even list?
Sort the numbers and take the average of the two middle values. For 1, 2, 3, 4 the median is (2 + 3) ÷ 2 = 2.5.
Why is the mean higher than the median in income data?
Because a few very high incomes pull the mean up. The median is more representative when data is skewed, which is why median income is usually reported.
How do I calculate a weighted average?
Multiply each value by its weight, add the products, then divide by the total weight. If one exam counts double, its score is multiplied by 2 before averaging.