An online calculator to calculate probabilities associated with normally distributed variables. There are 3 calculators depending on which probability you wish to calculate. You might find small differences between using tables and using these calculators. These are due to round off errors. Let X be a normally distributed variable.

__Calculator 1: Find probability P(X < x)__

1 - Enter the mean **mu**, **sigma** the standard deviation of the normal distribution and **x** then press "enter".

__Calculator 1: Find probability P(x1 < X < x2)__

1 - Enter the mean **mu**, **sigma** the standard deviation of the normal distribution and **x1** and **x2** then press "enter".

__Calculator 1: Find probabilty P(X > x)__

1 - Enter the mean **mu**, **sigma** the standard deviation of the normal distribution and **x** then press "enter".

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