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Excel PI function

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




  • This function has no arguments.

Return Value

It returns a numeric value.


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.


# 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.


# Example 3

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


# 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.


Related Functions

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

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