# Surface Area of a Rectangular Prism Calculator

Solving a **rectangular** prism to find its **area** and volume isn’t an **easy** task as you have to **perform** different operations, get multiple **values**, and deal with complex **steps**. You can’t do this unless you **love** Mathematics and have proficient skills to **work** in this field. If you are a **student** and looking to make the process of area calculation of this figure **easier**, you should use the **surface area of a rectangular prism calculator**.

This online handy **tool** is useful for students, Mathematical **professionals**, and others related workers. With the help of this maths calculator, you can easily find the surface **area** of any rectangular prism. Doesn’t matter whether you have **small** values or complex **ones**, you will find this tool **suitable** for area calculation. Let us show you a **complete** overview of this **tool** and the manual approach for this **calculation**.

**Table of Contents**

## Surface Area Definition

Surface area is the **length** and width (**area**) of the surfaces of **any** figure. **Shortly**, we can say that the **region **covered by any figure will be called its **surface area**. Every solid figure **covers** a surface area that can be **calculated** using its shape **category** and **dimensions**.

It is the calculation of the **region** in two dimensions **only** that are **length** and width. In simple **words**, we can say that surface area is a **2-D** related calculation that we **can** do on any solid figure in **Geomtery** or in **our** real life.

## Rectangular Prism Definition

A rectangular prism is a **specific** 2-D solid figure in **geometry** that has **6** rectangular **faces**. The opposite faces of a **rectangular** prism are **equal** to each other which **means** that it **fulfills** the basic property of the rectangle.

That’s **why** it is called a rectangular prism **instead** of a standard prism. A simple **example** of this **type** of prism is a regular **box** we **see** in our daily **lives**. In your childhood, you must have seen houses on **TV** with rectangular roofs. If we **remove** the roof of that **house**, the remaining part of the **house** will also be a rectangular prism.

This particular figure has a wide **scope**, in different **professional** Mathematics fields including **engineering**, architecture, and others. Many daily life **products** are designed on this **pattern** after comprehensive calculation of measures like area, **volume**, and others.

**Apparently**, this figure has **6** faces but there are three different **lengths** because two opposite lengths are the **same**.

### Surface area of a rectangular prism formula

Unlike a **rectangle**, it is a rectangular prism has a different **formula** for the surface area of a rectangular prism. **No doubt**, it is similar to the standard formula of a rectangle but has **some** changes in it. Here is the formula you **can** use to find the surface area of this **type** of prism.

Surface area of a rectangular prism = 2 (lw + wh + lh)

In the above formula,

- “l” shows the length of the rectangular prism.
- “h” represents the length of the rectangular prism.
- T“w” represents the width of the rectangular prism.

### How to find the Surface area of a rectangular prism?

To find the **surface** area of a rectangular prism, you **only** have to put the values in the **above** formula. As you can **see**, it will be difficult because you have to **multiply** and add the **answers **one by one. So, we have solved an **example** here to let you understand the process.

Find the surface area of a rectangular prism having length, width, and height equal to 3m, 5m, and 7m.

As we know,

Surface area of a rectangular prism = 2 (lw + wh + lh)

So,

= 2 [(3 x 5) + (5 x 7) + (3 x 7)] sq. m

= 2 [15 + 35 + 21] sq. m

= 2 [71] sq. m

= 142 sq. m

### How to use the surface area of a rectangular prism calculator?

It is not **compulsory** that you have simple values all the time to **find** the surface area of a rectangular prism. You may have complex or **bigger** measurements to deal with. In this **regard**, you should use this tool by Calculator’s Bag. Follow these steps to go ahead and find the area using this tool.

- Enter the measurement of the length in the first input box
- Write the measure of the width in the second input box
- Enter the measure of the height in the first input box
- This calculator will automatically show you the answer for the surface area of the rectangular prism

### FAQ | Surface Area of a Rectangular Prism Calculator

**How do you get the surface area of a rectangular prism?**

To find the surface area of a rectangular prism, you have to use the following formula.

Surface area of a rectangular prism = 2 (lw + wh + lh)

**What is a rectangular prism?**

A rectangular prism is a solid 2-D figure with 6 equal faces like a rectangle.

**How does the surface area of a rectangular prism calculator work?**

This surface area of a rectangular prism calculator has an advanced algorithm with pre-programmed formula according to which it finds the final answer.

**Can the surface area of a rectangular prism calculator handle rectangular prisms with fractional dimensions? **

No, this calculator can’t handle the fractional dimensions. You have to divide the fraction to get the answer in decimals before using this online calculator.

**What are the applications of the surface area of a rectangular prism calculator? **

Using this calculator, you can find the area of this shape that will help you in many daily life projects. You can use it for the calculation of the area of a house you are going to design in this shape.