Descriptive statistics
Explore descriptive statistics tools with formulas, input guidance and worked examples.
Mean Median Mode Calculator
Find the average, middle value and most frequently repeated values in a list of numbers.
Open toolVariance Calculator
Calculate sample or population variance from a list of numbers and compare their spread.
Open toolStandard Deviation Calculator
Calculate sample or population standard deviation from a list of observations.
Open toolQuartile Calculator
Find the first quartile, median and third quartile using linear percentile interpolation.
Open toolPercentile Calculator
Find the value at a chosen percentile of a list using linear interpolation.
Open toolInterquartile Range Calculator
Calculate the distance between the first and third quartiles of your data.
Open toolGeometric Mean Calculator
Find the geometric mean of positive numbers using their logarithms.
Open toolHarmonic Mean Calculator
Find the harmonic mean of positive numbers, useful when comparing suitable rates.
Open toolRoot Mean Square Calculator
Calculate the RMS magnitude of a list, including positive and negative values.
Open toolMedian Absolute Deviation Calculator
Find the unscaled median absolute deviation as a robust measure of spread.
Open toolMean Absolute Deviation Calculator
Find the average absolute distance of observations from their arithmetic mean.
Open toolRange Calculator
Find the spread between the largest and smallest values in a list.
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