Surface Area of Rectangular Box Calculator

Length

Width

Height

Rectangular Box Surface Area Calculator

Do you need a quick and reliable way to calculate the surface area of a rectangular box? Our Rectangular Box Surface Area Calculator makes the process simple and accurate. Just enter the length, width, and height, and the calculator instantly provides the total surface area. Whether you’re a student solving geometry problems, an engineer designing structures, or a teacher preparing assignments, this tool saves time and ensures error-free results.

What is the Surface Area of a Rectangular Box?

A rectangular box (also known as a cuboid) is a 3D solid shape with six rectangular faces. The surface area of a rectangular box is the total area of all its faces.

The formula is:Surface Area = 2(lb + bh + lh)

Where:l = length, w (or b) = width, h = height

👉 This formula works by adding the areas of opposite rectangular faces: Two faces of length × width Two faces of width × height Two faces of length × height
The calculator automates this process for you, delivering instant results.

How Does the Rectangular Box Surface Area Calculator Work?

Enter the length (l) of the box.
Enter the width (w) of the box.
Enter the height (h) of the box.
Click Calculate.
Get the total surface area instantly.

No manual calculation or formula memorization is required — the calculator does the work for you.

Examples of Surface Area of a Rectangular Box

Example 1: l = 5 cm, w = 4 cm, h = 3 cm → SA = 94 cm²

Example 2: l = 10 cm, w = 6 cm, h = 4 cm → SA = 248 cm²

Example 3: l = 12 m, w = 8 m, h = 5 m → SA = 392 m²

Example 4: l = 7 cm, w = 7 cm, h = 7 cm (a cube) → SA = 294 cm²

Example 5: l = 15 cm, w = 10 cm, h = 8 cm → SA = 700 cm²

Features of Our Rectangular Box Surface Area Calculator

✅ Calculates total surface area with just length, width, and height

✅ Works instantly for small and large values

✅ Accurate results with no manual effort required

✅ Free to use and mobile-friendly

✅ Clean, easy-to-use interface

✅ Suitable for students, teachers, engineers, and professionals

Who Should Use This Calculator?

Students & Teachers – For assignments, tests, and understanding geometry concepts

Engineers & Architects – For surface planning in construction and design projects

Construction Professionals – For estimating paint, material coverings, or packaging needs

Researchers & Mathematicians – For quick and accurate geometry calculations

Everyday Users – For DIY projects, crafts, or real-life box measurements

Why Use an Online Rectangular Box Surface Area Calculator?

Manual calculations require multiple steps, including multiplication and addition, which can be error-prone. Mistakes in even one step can lead to incorrect results.
Our Rectangular Box Surface Area Calculator eliminates the hassle. With just three inputs — length, width, and height — you’ll instantly get accurate results.

Practical Applications

Education – Learning geometry formulas in classrooms

Architecture – Designing box-shaped structures and objects

Construction – Estimating surface coverings like paint or tiles

Manufacturing – Calculating packaging material requirements

DIY & Crafts – Measuring boxes for storage, design, or art projects

✅ The Rectangular Box Surface Area Calculator is a must-have tool for anyone dealing with 3D geometry. From students to professionals, it makes calculations faster, easier, and more accurate.

👉 Try our Rectangular Box Surface Area Calculator today on Hive Calculator and simplify all your geometry calculations in seconds.