Cube & Cuboid Calculator
Volume & Surface Area ⚡
Calculate the volume, surface area, and space diagonal of a cube or cuboid. For a cube, enter only the side length.
Calculate the volume, surface area, and space diagonal of a cube or cuboid. For a cube, enter only the side length.
Cube Volume: V = a³
Cube Surface Area: A = 6a²
Cube Space Diagonal: d = a√3
Cuboid Volume: V = l × w × h
Cuboid Surface Area: A = 2(lw + lh + wh)
Cuboid Space Diagonal: d = √(l² + w² + h²)
What is a cuboid?
A cuboid (also called a rectangular prism) is a 3D shape with six rectangular faces. A cube is a special cuboid where all sides are equal length.
What is the space diagonal?
The space diagonal is the longest straight line through the interior, from one corner to the opposite corner. It passes through the centre of the shape.