Average Calculator

The average calculator takes one pasted list of numbers and answers every question at once: the mean (arithmetic average), the median, the mode or modes, the range, the sum, the count, and the minimum and maximum. You do not need to clean the list first — commas, spaces, semicolons and new lines all work as separators, and decimal commas such as 3,14 are read correctly.

Each statistic answers a different question. The mean is the sum divided by the count and represents the balanced center of the data. The median is the middle value of the sorted list — half the values sit below it, half above — and it ignores extreme outliers. The mode is the most frequent value; a list where nothing repeats honestly reports "no mode" instead of inventing one. The range, max − min, shows how spread out the values are.

The weighted average mode handles the cases where some values matter more than others: course grades with different credit counts, portfolio returns with different position sizes, survey answers with different group sizes. Enter one value and weight pair per line and the calculator shows the full working — every value × weight product, the sum of products, the sum of weights, and the final Σ(value × weight) ÷ Σweight result.

The whole tool runs locally in your browser: nothing is uploaded, no account is needed, and pasting a thousand numbers is as fast as pasting ten. The sorted copy of your list is printed under the results so you can verify the median and the extremes by eye.