Normal Distribution Calculator

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Calculates probabilities and percentiles associated with the standard normal (Z) distribution or any normal distribution.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Mean (μ), Standard Deviation (σ), X Value, Calculate Probability, and X Value 2 (for between) in the units shown.

Step 2

Read Z-score 2, P(X = x), Z-score, P(x₁ < X < x₂), P(X > x), P(X < x), and Probability in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Explore the topic

Use calculators for algebra, geometry, trigonometry, probability, statistics, averages, z-scores, tests, and graphing tasks.

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