The PHI function returns the value of the density function for a standard normal distribution.

**Syntax**:= PHI(x)

The PHI function syntax has the following arguments:

**X**Required. X is the number for which you want the density of the standard normal distribution.

**Example**: Let’s look at some Excel PHI function examples and explore how to use the PHI function as a worksheet function in Microsoft Excel:

**Syntax**: =PHI(A2)

**Result**: 0.301137432

Based on the Excel spreadsheet above, the following PHI examples would return:

**Syntax**: =PHI(A3)**Result**: 0.129517596

**Syntax**: =PHI(A4)**Result**: 0.053990967

**Syntax**: =PHI(A5)**Result**: 0.396952547

**Syntax**: =PHI(A6)**Result**: 0.241970725

**Syntax**: =PHI(A7)**Result**: 0.053990967

**Syntax**: =PHI(A8)**Result**: 0.352065327

**Syntax**: =PHI(A9)**Result**: 0.129517596

**Syntax**: =PHI(A10)**Result**: 0.0175283

**Syntax**: =PHI(A11)**Result**: 0.004431848

**Note**:

- #VALUE! error – Occurs when x uses a data type that is not valid, such as a non-numeric value.
- #NUM! error – Occurs when x is a numeric value that is not valid.