# NORM.S.INV function

Returns the inverse of the standard normal cumulative distribution. The distribution has a mean of zero and a standard deviation of one.

## Syntax

NORM.S.INV(probability)

The NORM.S.INV function syntax has the following arguments:

• Probability     Required. A probability corresponding to the normal distribution.

## Remarks

• If probability is nonnumeric, NORMS.INV returns the #VALUE! error value.

• If probability <= 0 or if probability >= 1, NORMS.INV returns the #NUM! error value.

Given a value for probability, NORM.S.INV seeks that value z such that NORM.S.DIST(z,TRUE) = probability. Thus, precision of NORM.S.INV depends on precision of NORM.S.DIST. NORM.S.INV uses an iterative search technique.

## Example

Copy the example data in the following table, and paste it in cell A1 of a new Excel worksheet. For formulas to show results, select them, press F2, and then press Enter. If you need to, you can adjust the column widths to see all the data.

Formula

Description

Live Result

=NORM.S.INV(0.908789)

Inverse of the standard normal cumulative distribution, with a probability of 0.908789

1.3333347