Describing Data

Averages, spread, quartiles, percentiles and outliers.

• Coefficient of Variation Calculator The standard deviation as a percentage of the mean, for comparing spread between data sets.
• Geometric and Harmonic Mean Calculator The geometric and harmonic means of a list of positive numbers, beside the ordinary mean.
• Mean Absolute Deviation Calculator The average distance of values from their mean, and from their median.
• Mean, Median, Mode and Range Calculator The mean, median, mode, range and midrange of a list of numbers.
• Outlier Calculator Flags unusual values with Tukey’s fences and z-scores.
• Percentile Calculator The value at any percentile of a list of numbers, by the method you choose.
• Percentile Rank Calculator Where a value stands within a list of numbers, as a percentile rank.
• Quartile, IQR and Five-Number Summary Calculator Quartiles, the interquartile range and the five-number summary, with the method stated and compared.
• Standard Deviation and Variance Calculator Sample and population standard deviation and variance of a list of numbers.
• Weighted Average Calculator An average where some values count for more than others.