The **PI function in Microsoft Excel** is a Math and Trigonometry function, and it returns the value of PI. The formula for the PI formula is `=PI ()`

. The PI function syntax has no arguments.

## How to use the PI function in Excel

Follow the steps below to use the PI function in Microsoft Excel:

- Launch Microsoft Excel
- Create a table or use an existing table from your files
- Place the formula into the cell you want to see the result
- Press the Enter Key

Launch Microsoft Excel.

Create a table or use an existing table from your files.

Place the formula **=PI()** into the cell you want to see the result.

Press the Enter key to see the result.

Excel will return the **PI 3.141593**.

Type into the cell **=PI()/2** and press enter. Excel will return the PI divided by *2*, which gives the result of *1.570796*.

Type into the cell **=PI()*(A2^2)** and press enter. Excel will return the result *50.26548*. The *A2 *cell contains the area of the circle with a radius.

There are two other methods to use the PI function.

**Method one** is to click the *fx* button on the top left of the Excel worksheet.

An **Insert Function** dialog box will appear.

Inside the dialog box in the section, **Select a Category**, select *Math and Trigonometry *from the list box.

In the section **Select a Function**, choose the *PI *function from the list.

Then click *OK.*

A **Function Arguments** dialog box will open.

Then click* OK.*

**Method two** is to click the **Formulas **tab, then click the *Math and Trigonometry *button in the *Function Library* group.

Then select *PI *from the drop-down menu.

A **Function Arguments** dialog box will open.

### What does PI mean in math?

In Math, Pi is defined as the ratio of a circle’s circumference to its diameter. The value of PI is 3.14, and regardless of circle size, this ratio will always equal PI. PI is written as the Greek letter for p or π.

### How to multiply by PI in Excel?

Excel is a program that can be used to calculate math. Normally, when users multiply PI in Excel, it is when they want to calculate the area of the circle from the diameter or radius; for example, calculating an area of the circle from the diameter, =PI()*3 or calculating an area of the circle from the radius **=PI()/4*3^2**.

We hope this tutorial helps you understand how to use the PI function in Microsoft Excel; if you have questions about the tutorial, let us know in the comments.