used by people in more than 220 countries!

Formulas: Cumulative Area Under the Standard Normal Curve

Cumulative Area Under the Standard Normal Curve Formulas

Below you will find descriptions and details for the 2 formulas that are used to compute the cumulative area under the standard normal distribution.

Error function:
Error function formula
Normal distribution cumulative distribution function (CDF):
Normal distribution cumulative distribution function (CDF) formula
where ยต is the mean, σ is the standard deviation, and erf is the error function.
Related Resources
Calculator Formulas References Related Calculators Search