The formula for calculating the area of all the surfaces of a cube (Total Surface Area) is 6a^2, where a is the length of one side of the cube.

The formula for calculating the Lateral Surface Area (area of four walls of a room) of the cube is 4a^2, where a is the length of one side of the cube.

Thank you for the question.

Hey With all due respects, call a spoon a spoon, not a spade. A cube can not be a cube without all faces perfectly squared and thoroughly right-angled. This all adds up to the true definition of a 'cube'.

...The formula works only if the cube is equal on all six sides. A parallelepiped is also cubical as is a cube called a trigonal trapezohedron wich don't have all six sides equal.

...You find the area of one of its squares by multiplying one side by itself. Then, you multiply this number by 6 because a cube is composed of six squares.

...To find the surface area of a cube you take the length of one side, then multiply that by itself, then multiply that by 6. Here is the equation. (x^2)(6)

...Where x is the length of one side of the cube, the surface area of the cube will be achieved by the formula:

Surface area = (x^2) * 6