Volume of a Rectangular Parallelepiped
Units of Volume
What is Volume?
Volume is the measure of space inside a three-dimensional (3D) figure.
- It tells us how much space a solid object occupies
- It answers the question: "How much fits inside?"
- Volume is measured in cubic units
Think of it this way: If you could fill a box with tiny cubes, the volume tells you how many cubes would fit inside!
Interactive 3D Box
Interactive visualization — available in the full lesson
This box contains 4 × 3 × 2 = 24 unit cubes. Drag to rotate!
What is a Cubic Unit?
A cubic unit is a cube with an edge length of 1 unit.
It's the basic building block for measuring volume!
Example: 1 cm³ (one cubic centimeter)
A cube where each edge is exactly 1 centimeter long. It's about the size of a small sugar cube!
When we measure volume, we count how many unit cubes fit inside the figure.
Interactive visualization — available in the full lesson
1 Cubic Centimeter (1 cm³)