An average summarises a list of numbers with a single value. The mean, median and mode are all called averages, and they can give very different answers for the same list when it contains an outlier or repeated values.

Both calculators accept a list of numbers separated by commas or spaces.

Calculators in this category

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Good to know

One unusually large value pulls the mean towards it but barely moves the median. For incomes and house prices the median usually describes a typical value better. The mean, median and mode guide has a worked example.

Two group averages cannot simply be averaged unless the groups are the same size: weight each mean by its group size first.

Background reading