# NORM.S.DIST function

Returns the standard normal distribution (has a mean of zero and a standard deviation of one).

Use this function in place of a table of standard normal curve areas.

## Syntax – Standard Normal Distribution

`NORM.S.DIST(z,cumulative)`

The NORM.S.DIST function syntax has the following arguments (argument: A value that provides information to an action, an event, a method, a property, a function, or a procedure.):

• Z     Required. The value for which you want the distribution.
• Cumulative     Required. Cumulative is a logical value that determines the form of the function. If cumulative is TRUE, NORMS.DIST returns the cumulative distribution function; if FALSE, it returns the probability mass function.

## Remarks

• If z is nonnumeric, NORM.S.DIST returns the #VALUE! error value.
• The equation for the standard normal density function is:

## Example

The example may be easier to understand if you copy it to a blank worksheet.

1. Select the example in this article. If you are copying the example in Excel Online, copy and paste one cell at a time.
Important: Do not select the row or column headers.

Selecting an example from Help

1. Press CTRL+C.
2. Create a blank workbook or worksheet.
3. In the worksheet, select cell A1, and press CTRL+V. If you are working in Excel Online, repeat copying and pasting for each cell in the example.
Important: For the example to work properly, you must paste it into cell A1 of the worksheet.
4. To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.

After you copy the example to a blank worksheet, you can adapt it to suit your needs.

A B
Formula Description (Result)
=NORM.S.DIST(1.333333,TRUE) Normal cumulative distribution function at 1.333333 (0.908789)
=NORM.S.DIST(1.333333,FALSE) Normal probability distribution function at 1.333333 (0.16401)

Applies to:
Excel 2010, Excel Web App, SharePoint Online for enterprises, SharePoint Online for professionals and small businesses