A rectangular prism, also known as a cuboid, is a solid geometric shape that has six faces, all of which are rectangles. The volume of a rectangular prism can be found by multiplying the length, width, and height of the prism.

## Formula for the Volume of a Rectangular Prism

The formula for the volume of a rectangular prism is as follows:

**Volume = Length × Width × Height**

To better understand this formula, let’s go through a step-by-step example of calculating the volume of a rectangular prism.

## Step-by-Step Example of Calculating the Volume of a Rectangular Prism

**Problem:** Find the volume of a rectangular prism with a length of 5 units, a width of 3 units, and a height of 4 units.

**Step 1: Identify the Length, Width, and Height**

In this example, we are given the dimensions of the rectangular prism:

- Length (L) = 5 units
- Width (W) = 3 units
- Height (H) = 4 units

**Step 2: Apply the Volume Formula**

Now, we will apply the volume formula to the given dimensions:

Volume = Length × Width × Height

Plug in the given values:

Volume = 5 units × 3 units × 4 units

**Step 3: Calculate the Volume**

Multiply the dimensions together:

Volume = 15 units² × 4 units

Volume = 60 units³

So, the volume of the rectangular prism with a length of 5 units, a width of 3 units, and a height of 4 units is 60 cubic units.

## Key Points for Understanding the Volume of a Rectangular Prism

- The formula for the volume of a rectangular prism is Volume = Length × Width × Height. This formula is derived from the fact that the volume of any 3D shape is equal to the product of its three dimensions.
- The units for measuring the volume of a rectangular prism are cubic units (e.g., cubic meters, cubic inches, etc.), as the volume represents the amount of space that the prism occupies in three-dimensional space.
- When solving problems involving the volume of a rectangular prism, it’s essential to identify the length, width, and height of the prism and ensure that all the dimensions are in the same unit of measurement before applying the volume formula.
- To find the volume of a rectangular prism, multiply the length, width, and height together. The result will be the volume in cubic units.

By understanding the formula for the volume of a rectangular prism and following the step-by-step process outlined above, you can easily calculate the volume of any rectangular prism. Remember, the key is to identify the length, width, and height of the prism and then apply the formula: Volume = Length × Width × Height.