Calculator tool
Mean = sum/count. Median = middle value when sorted. Mode = most frequent value. Range = max − min. These four measures describe the center and spread of data.
Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.
When is the median better than the mean?
Median is better when data has outliers or is skewed. For example, household income uses median because a few very high incomes would distort the mean.
Standard Deviation Calculator
Calculate population and sample standard deviation, variance, and mean for a set of numbers.
Open toolStatistics Calculator
Compute comprehensive descriptive statistics including mean, median, standard deviation, quartiles, and IQR.
Open toolZ-Score Calculator
Calculate the z-score (standard score) and approximate percentile for a value relative to a normal distribution.
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