Average Calculator

Paste any list of numbers and get every common average at once — mean, median and mode — plus range, sum and count, rather than having to pick one statistic and recalculate for the others.

Mean, median and mode — when each one matters

The mean (the sum divided by the count) is what most people mean by 'average', and it's the right choice when values are reasonably evenly spread. It's also the one most distorted by outliers: add one $10 million salary to a list of nine $50,000 salaries and the mean jumps to over $1 million, telling you almost nothing useful about a typical person on the list.

The median (the middle value once sorted) ignores that problem — it's the number where half the list is above and half below, and it barely moves when one extreme value changes. Household income, house prices and salary data are almost always reported as medians for exactly this reason.

The mode (the most frequent value) is the only one of the three that makes sense for non-numeric or categorical data — the most common shoe size sold, the most common exam grade — and it's the only average that can have more than one answer, or none at all if every value is unique.

Range, sum and count

Range (highest minus lowest) gives a quick sense of spread without the full standard-deviation calculation — useful for spotting whether a dataset is tightly clustered or has a wide scatter at a glance. Sum and count are shown because they're the two numbers the mean is built from, and are often what you actually need for a total rather than an average.