The number Pi is an important mathematical constant, often represented by the symbol π. Its value is the ratio of the circumference of a circle to its diameter (approximately 3.14159). In everyday life, Pi has wide applications in mathematics, science, and engineering. However, you can also use Pi in Excel to calculate the circumference of a circle, the area of a circle, or even create complex charts based on data related to this number.

So how do you write and use Pi in Excel, and does Excel have a PI function? Let’s find out all the answers in the article below.

**How to write Pi in Excel?**

To write Pi (π) in Excel, you can use one of the following methods:

**Method 1: Use the PI function in Excel**

The first and simplest way to get the value of Pi is to use the built-in PI function in Excel. Here are the steps to write Pi in Excel using the PI function:

**Step 1:** Select the cell where you want to display Pi. Let’s say you select cell **A6** to display Pi.

**Step 2:** Enter the formula **=PI()** into cell A6.

**Step 3:** Press **Enter**. The result will display the value of Pi (π) in the selected cell. Typically, this value is around 3.141592654 (depending on the precision of Excel).

**Method 2: Copy and paste from another source**

If you have the value of Pi from another source, such as a website or a document, you can copy and paste it into Excel.

**Step 1:** Let’s say you search for the value of Pi on Google. Then, copy Pi by selecting the sequence of numbers, right-clicking and selecting the ** Copy** option, or by pressing the

**keyboard shortcut.**

*Ctrl + C***Step 2:** Select the cell where you want to paste Pi into Excel. Let’s say you select cell **B6** to paste Pi.

**Step 3:** Press the ** Ctrl + V** keyboard shortcut to paste it into cell

**B6**of the worksheet.

After that, Excel will display the Pi value as you copied it from the original source.

So, you know how to write Pi in Excel through different methods. Depending on your goal, you can choose the most appropriate method.

**How to use the PI function in Excel**

The PI function is very useful. Therefore, this article will provide you with some specific real-life examples of how to use the PI function in Excel. In each example, FPT Shop will provide detailed instructions for you to understand easily.

**Calculate the area and circumference of a circle**

You can use the PI function to calculate the area and circumference of circles or spheres by using the formulas A = πr² (area) and C = 2πr (circumference), where “r” is the radius of the circle.

**Step 1:** Create two cells in your Excel worksheet. One cell will contain the radius of the circle (e.g., A6), and one cell will be for the area (e.g., B6) or circumference (e.g., C6) of the circle.

When you press ** Enter**, Excel will calculate the area of the circle based on the radius value you’ve entered in cell A6.

**Step 3:** In the circumference cell (e.g., C6), enter the following formula to calculate the circumference of the circle:

**=2*PI()*A6**

In this formula:

**PI()**is also the PI function in Excel.**A6**is the cell that contains the radius of the circle.

When you press ** Enter**, Excel will calculate the circumference of the circle based on the radius value you’ve entered in cell A6.

The results of the area and circumference of the circle will be displayed in the corresponding cells B6 and C6. You can change the value of the radius in cell A6 to experiment with calculations using different values for the circle.

**Calculate the volume of a sphere**

In the field of three-dimensional geometry, the PI function can be used to calculate the volume of a sphere using the formula V = (4/3)πr³, where “r” is the radius of the sphere. The steps are as follows:

**Step 1:** Create a cell in your Excel worksheet to input the value of the radius of the sphere. Let’s say you put the radius in cell A6.

**Step 2:** In the field where you want to display the volume of the sphere (e.g., B6), enter the following formula:

**= (4/3) * PI() * A6^3**

In this formula:

**PI()**is the built-in function in Excel to return the value of Pi (π).**A6**is the cell that contains the radius of the sphere.

When you press ** Enter**, Excel will calculate and display the volume of the sphere based on the radius value you’ve entered in cell A6.

The result of the volume of the sphere will be displayed in cell B6. You can change the value of the radius in cell A6 to calculate the volume of different spheres.

**Calculate the surface area of a sphere**

The PI function can also be used to calculate the surface area of a sphere using the formula S = 4πr². The steps are as follows:

**Step 1:** Create a cell in your Excel worksheet to input the value of the radius of the sphere (e.g., A6).

**Step 2:** In the field where you want to display the surface area of the sphere (e.g., B6), enter the following formula:

**=4*PI()*A6^2**

In this formula:

**PI()**is the built-in function in Excel to return the value of Pi (π).**A6**is the cell that contains the radius of the sphere.

When you press ** Enter**, Excel will calculate and display the surface area of the sphere based on the radius value you’ve entered in cell A6.

**Calculate geometric shapes related to a circle**

You can use the PI function to calculate the circumference and area of shapes like arcs, sectors, and other shapes related to circles. The steps are as follows:

**Step 1:** Create cells in your Excel worksheet to input the value of the radius of the circle (e.g., A6) and the angle of the circle (e.g., B6).

**Step 2:** In the field where you want to display the area of the arc (e.g., C6), enter the following formula to calculate the area:

**= (B6/360) * PI() * A6^2**

In this formula:

**PI()**is the built-in function in Excel to return the value of Pi (π).**A6**is the cell that contains the radius of the circle.**B6**is the cell that contains the angle of the circle (usually represented in degrees).

**Step 3:** In the field where you want to display the circumference of the arc (e.g., D6), enter the following formula to calculate the circumference:

**= (B6/360) * 2 * PI() * A6**

In this formula, the components have the same meanings as the formula for calculating the area of the arc.

When you enter these formulas and press ** Enter**, Excel will calculate and display the area/circumference of the arc based on the radius and angle values you’ve entered in the corresponding cells.

**Summary**

In this article, FPT Shop has shared with you how to write Pi in Excel and how to use the PI function in Excel. With the accompanying real-life examples, hopefully, you can apply the PI function in different work situations. We wish you can easily perform geometric and natural science calculations in your spreadsheet.

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