## Excel PI function

Author: Siluvia Last Modified: 2022-04-29

The PI function returns the number 3.14159265358979 of the mathematical constant called pi.

PI()

#### Arguments

• This function has no arguments.

#### Return Value

It returns a numeric value.

#### Examples

The examples below demonstrate how to use the PI function in Excel.

##### # Example 1

To return the result of pi, just enter the formula below into a cell (such as D6 in this case), and then press Enter.

=PI()

##### # Example 2

To calculate the area of a circle with the radius provided in B9, you need to enter the following formula into a blank cell (such as cell D9 in this case), and then press Enter to get the result.

=PI()*(B9^2)

##### # Example 3

Cell D12 returns the result of multiplying pi by a number provided in cell B12 with the formula below:

=PI()*B12

##### # Example 4

The PI function can also be used to convert angle degrees to radians.

As shown in the screenshot below, in range B6:B14, there is a list of angel degrees, to convert these angle degrees to corresponding radians, you need to:

Select a blank cell, enter the following formula and press the Enter key to get the first result. Then drag its AutoFill Handle down to get the radians of other angle degrees.

=B6*PI()/180

#### Related Functions

Excel SQRTPI function
The SQRTPI function returns the square root of a supplied number multiplied by pi.

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