Cube Calculator

A cube is the simplest of the three-dimensional solids: every edge has the same length, every face is a square, and every angle is a right angle. Because of that uniformity, all four key measurements follow directly from just one input, the side length. This calculator takes the side length and returns the volume, the total surface area, the face diagonal (the diagonal across one square face), and the space diagonal (the longest straight line from one corner of the cube to the opposite corner, passing through the interior). Volume tells you how much the cube can hold and is used in packaging, shipping, and storage calculations. Surface area is needed whenever you are covering or coating the outside, whether painting a box, wrapping a gift, or calculating material cost. The face diagonal matters in woodworking and engineering when you need to know the clearance across a flat surface. The space diagonal is useful when you need to fit the longest object inside a cube-shaped container. You can enter any positive number and the units are consistent throughout, so if the side is in metres the volume will be in cubic metres and the diagonals in metres. The calculator updates the moment you change the input. Results are exact to two decimal places. Use them as a reference for study, checking your own geometry working, or practical projects.

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