## How to use the PHI function

*Article last updated on August 06, 2018*

The PHI function calculates a number of the density function for a standard normal distribution.

Formula in cell C3:

### Excel Function Syntax

PHI(*x*)

### Arguments

x |
Required. x is the number for which you want to calculate the density of the standard normal distribution. |

### Comments

The PHI function returns:

- #NUM# error value if the argument is an invalid numeric value.
- #VALUE! error value if the argument is an invalid data type, like a non numeric value.

The following chart shows the density values for a normal distribution where x is between -4 and 4.

### Functions in 'Statistical'

The PHI function function is one of many functions in the 'Statistical' category.

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