Enter the mean μ (average), standard deviation σ, and cutoff points, and this normal distribution calculator will compute the area (probability) under the normal distribution curve.

The Normal Distribution Calculator makes it easy to compute cumulative probability, given a standard score from a standard normal distribution or a raw score from any other normal distribution; and vice …

Calculate normal distribution probabilities and critical values with interactive visualization. Free tool with z-score conversion and percentiles.

Our calculator supports normal distributions with any real-valued mean and variance.

Calculate probabilities, z-scores, and percentiles for normal distributions. Interactive bell curve visualization with educational explanations.

Indicate whether you want to find the area above a certain value, below a certain value, between two values, or outside two values. Indicate the value (s). Hit tab, return, or the "recalculate button." The …

Enter mean, standard deviation and cutoff points and this calculator will find the area under standard normal curve. The calculator will generate a step by step explanation along with the graphic …