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Welcome to the area under the standard normal distribution calculator by ONLINE! In the following, we are focusing on how to calculate the area under standard normal distribution.

The total area under the standard normal distribution curve is 1. Therefore, if we have a Z value, i.e., how far a value is above or below the mean (0), we can determine the probability of a value less than or greater than that.

Here are the steps you need to follow:

1. Specify the Z.
2. Set the decimal digit as you require.
3. The area under the standard normal distribution, A, will then be calculated correspondingly.

The figure below shows the relationship between the above parameters.

Example: Calculate the area under of standard normal distribution before Z=-2. It is shown by A. the decimal digit is 4. The following figure shows the value of shaded area.

The A=0.0228 displays on output box. The concept of this calculation is shown below.