Normal distribution calculator

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

Enter parameters of the normal distribution:

Mean

Standard deviation

Above

Below

Between

and

Outside

and

Result:

Area (probability) = 0

Normal or Gaussian distribution (named after Carl Friedrich Gauss) is one of the most important probability distributions of a continuous random variable. The normal distribution is important in statistics and is often used in the natural and social sciences to represent real-valued random variables whose distributions are unknown. The normal distribution is sometimes informally called the bell curve.

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