Calculate cube volume, surface area, face diagonal, space diagonal, inscribed and circumscribed sphere properties from side length. Includes scaling table and dimension comparison.
This all-in-one cube calculator computes every geometric property of a cube from a single measurement: the side length. Enter the edge length in any unit and instantly receive 17+ properties including volume, total and lateral surface area, face and space diagonals, inscribed/midsphere/circumscribed sphere radii and their own volumes and surface areas, plus topological constants.
The cube — also known as a regular hexahedron — is one of the five Platonic solids. Its perfect symmetry makes it the most commonly encountered 3-D shape in architecture, packaging, storage, and manufacturing. Understanding how its properties scale with size is fundamental to physics and engineering: the square-cube law dictates that doubling the side multiplies area by 4 but volume by 8.
The inscribed sphere (insphere) is the largest sphere that fits inside the cube, touching each face at its centre. The midsphere touches each edge at its midpoint. The circumscribed sphere (circumsphere) is the smallest sphere that encloses the cube, passing through all eight vertices. These sphere relationships are important in crystallography, packing problems, and collision detection in computer graphics.
Use the scaling table to explore how properties change across a range of sizes, and the visual bar chart to compare all linear dimensions at a glance.
The Cube Volume, Area & Diagonal Calculator is useful when you need fast and consistent geometry results without reworking the same algebra repeatedly. It helps you move from raw measurements to Volume, Total Surface Area, Face Diagonal in one pass, with conversions and derived values shown together.
Use it to validate homework steps, check CAD or fabrication dimensions, estimate material requirements, and sanity-check hand calculations before submitting work.
Volume = a³ Surface Area = 6a² Lateral Area = 4a² Face Diagonal = a√2 Space Diagonal = a√3 Inscribed Sphere r = a/2 Midsphere ρ = a√2/2 Circumscribed Sphere R = a√3/2 SA:V Ratio = 6/a
Result: Volume = 1000 cm³, SA = 600 cm², Space diagonal ≈ 17.32 cm
A 10 cm cube has volume 10³ = 1000 cm³, surface area 6 × 100 = 600 cm², face diagonal 10√2 ≈ 14.14 cm, space diagonal 10√3 ≈ 17.32 cm, inscribed sphere r = 5 cm, and circumscribed sphere R ≈ 8.66 cm.
This calculator combines the core geometry formula with the input mode selected in the interface, then derives companion values shown in the output cards, comparison bars, and reference tables. Use it to cross-check both direct calculations and reverse-solving scenarios where one measurement is unknown.
Cube Volume, Area & Diagonal Calculator calculations show up in coursework, drafting, construction layout, packaging, tank sizing, machining, and quality control. Instead of solving each transformation manually, you can test scenarios quickly and verify whether your dimensions remain within tolerance.
Keep units consistent across every input before interpreting area, perimeter, angle, or volume outputs. For best results, measure carefully, round only at the final step, and compare at least one manual calculation with the calculator output when building confidence.
It computes volume, total and lateral surface area, face and space diagonals, inscribed/midsphere/circumscribed sphere radii and their volumes, edge totals, face perimeter, SA:V ratio, and topological constants. Use this as a practical reminder before finalizing the result.
The space diagonal connects two opposite vertices through the interior of the cube. Its length is a√3, where a is the side length.
The inscribed sphere fits inside the cube touching all faces (r = a/2). The circumscribed sphere encloses the cube touching all vertices (R = a√3/2).
The midsphere (or intersphere) is tangent to every edge of the cube at the midpoint. Its radius is a√2/2.
Surface area grows as a² while volume grows as a³. Dividing gives 6/a, which shrinks as a increases — the square-cube law.
Yes. The cube (regular hexahedron) is one of the five Platonic solids, with 6 square faces, 12 edges, and 8 vertices.