# Easy Normal CDF Calculator

Enter upper and lower bounds, population mean and standard deviation to calculate the area under the normal distribution curve with our Normal Distribution calculator.

The following calculator works similar to the normalCDF function found on TI-83 and TI-84 graphing calculators.

Solution : Area (probability) = 0.8849

Explanation
• Lower bound: Smallest value in the range for which you want to find the area under the curve.
• Upper bound: Largest value in the range for which you want to find the area under the curve.
• Mean: Average value of the normal distribution curve.
• Standard deviation: Measure of the spread of the normal distribution curve. It determines the width of the curve.

Once you have entered these four inputs, the normal distribution calculator will use mathematical formula to calculate the area under the curve for the specified range of values. The final value represents the probability that a random variable from the normal distribution will fall within the specified range.

Example

Suppose you are an HR manager and you want to find the percentage of employees whose salaries fall between \$60,000 and \$70,000 per year. You can use the normal distribution calculator to find the area under the curve between the values 60,000 and 70,000, given the mean and standard deviation of employee salaries.