z Score Calculator Standard Normal Distribution Curve
  AJ Design Software

z-Score Calculator

Math - Statistics - Percentile

This calculator determines the area under the standard normal curve given z-Score values. The area represents probability and percentile values. The calculator allows area look up with out the use of tables or charts. In addition it provide a graph of the curve with shaded and filled area.

The z-score is the number of standard deviations from the mean.

The standard normal distribution is a normal distribution with a standard deviation on 1 and a mean of 0.

Area Type
Left Right Equal Area
Left Right Different Area
Middle Equal Area
Middle Different Area

Select area type.
Adjust z-Score by using the steppers or manually entering the values.
Press calculate if the scores were manually entered to update the calculations.