Normal Distribution Calculator
Calculate probability, CDF, and percentile for normal distributions. Just enter mean and standard deviation to see the distribution graph.
How to Use
Enter Parameters

Enter the mean and standard deviation
Specify Value

Enter the X value or percentile for probability calculation
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
🔗Related Tools
Percentage Calculator
Calculate percentages easily. Instantly compute ratios, rate of change, and percent values.
Split Bill Calculator
Easily split bills for dining and parties. Instantly calculate per-person amount.
Random Number Generator
Generate random numbers within a specified range. Customize count, decimal places, and duplicate control.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal. Also supports custom base conversion (base 2 to 36).
GPA Calculator
Calculate your GPA (Grade Point Average) from course grades. Supports credit-weighted calculations.
Ratio Calculator
Calculate, simplify, and solve ratios. Solve for unknown values in A:B = C:D proportions.