In this post, you will learn about the *PI function* in Excel and how to use it in your excel spreadsheets.

The function returns the constant value π or pi which is approximately equal to **3.14159265.**

## PI Function in Excel

**Syntax**

**=PI()**

This syntax has no arguments

## How to use PI Function in Excel?

- This is an
**alternative**in the use of the value pi. It is used instead of the approximate value 3.1415… - This function is used in
**various**Excel mathematical formulas and functions.

- The below example uses the constant pi to find the
**Circumference**of the circle of radius 6. *Note:*Circumference of a circle – 2 x π x radius.

- The below example uses the pi value to find the
**Area**of a circle of radius. *Note:*Area of a circle – π x (radius)^{2}

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