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Normal Distribution Calculator

Calculate probability, CDF, and percentile for normal distributions. Just enter mean and standard deviation to see the distribution graph.

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How to Use

Step 1

Enter Parameters

Enter Parameters

Enter the mean and standard deviation

Step 2

Specify Value

Specify Value

Enter the X value or percentile for probability calculation

Step 3

Check Results

Check Results

Check probability density, CDF, and graphs

Features

Graph Display

Display the bell curve with an interactive graph

Cumulative Probability

Accurately calculate cumulative probabilities like P(X≤x) and P(a≤X≤b)

Inverse Function

Calculate X values from percentiles using the inverse function

FAQ

A probability distribution forming a symmetric bell curve centered at the mean. Many natural and social phenomena follow this distribution.