Statistics & Probability Calculators
Paste a list of numbers to summarise it, or work out probabilities and counting problems. Lists can be separated by commas, spaces or new lines.
Centre and spread
A single “average” can hide a lot. The mean uses every value but is pulled by outliers; the median is the middle value and resists them; the mode is the most common value. Pair a measure of centre with a measure of spread — the range or standard deviation — to describe data honestly. The guide mean, median and mode explained shows when to use each.
Describing a data set
Measures of centre and spread for a list of numbers.
- Average CalculatorThe mean of any list of numbers, with the sum, count and median.
- Median CalculatorThe middle value of a data set, plus the sorted list and quartiles.
- Mode CalculatorThe most frequent value(s) in a list, with a frequency summary.
- Range CalculatorMaximum minus minimum, plus the interquartile range.
- Standard Deviation CalculatorSample or population standard deviation and variance, step by step.
- Weighted Average CalculatorAverage where some values count more than others.