Use this Empirical Rule Calculator to quickly determine the ranges where most values lie in a normal distribution. Using the 68-95-99.7 rule, it calculates the intervals within one, two, and three standard deviations from the mean. Simply enter the population mean and standard deviation, and the calculator shows the corresponding ranges where 68%, 95%, and 99.7% of the data are expected to fall.
Below the calculator, you’ll find more information about interpreting the results. See all my Statistical Calculators!
Empirical Rule Calculator