# Surface Area Of A Rectangular Prism Calculator

A rectangular prism is a three-dimensional shape, having six faces, and all the faces of the prism are rectangles.

## What is the Surface Area of a Rectangular Prism Calculator?

'Cuemath's Online Surface Area of a Rectangular Prism Calculator' is an online tool that calculates the surface area of a rectangular prism within a few seconds.

## How to Use the Surface Area of a Rectangular Prism Calculator?

Please follow the below steps to find the surface area of a rectangular prism:

**Step 1:**Enter the length, breadth, and height of the rectangular prism in the given input box.**Step 2:**Click on the**"Calculate"**button to find the surface area of a rectangular prism.**Step 3:**Click on the**"Reset"**button to find the surface area for different lengths, breadth, and heights of the rectangular prism.

## How to Find the Surface Area of a Rectangular Prism?

The surface area of a rectangular prism is the number of unit squares that can be fit into it and it is measured in square units. The surface area of a rectangular prism whose length 'l', breadth 'b', and height 'h' are calculated by the following formula:

**The surface area of a rectangular prism = 2(lb+bh+lh)**

**Solved Example:**

Find the surface area of a rectangular prism whose length (l) = 8 units, breadth (b) = 5 units, and height (h) = 7 units?

**Solution:**

The surface area of the rectangular prism = 2( lb + bh + lh)

= 2( 8 × 5 + 5 × 7 + 8 × 7)

= 2(40 +35 + 56)

= 2 × 131

= 262 square units.

Similarly, you can try the calculator to determine the surface area of a rectangular prism with the following dimensions:

1) length (l) = 16 units, breadth (b) = 5 units, and height (h) = 7 units

2) length (l) = 9 units, breadth (b) = 4 units, and height (h) = 6 units