Volume Calculator – Cube, Cylinder & Sphere
Free volume calculator: compute the volume of a cube, cylinder, or sphere from dimensions. Use for tanks, storage, concrete, and geometry. No sign-up.
Volume Calculator
Calculate volume for cube, cylinder, or sphere. Enter dimensions in any unit; result is in cubic units.
How the volume calculator works
Cube: V = side³ | Cylinder: V = π × r² × h | Sphere: V = (4/3) × π × r³
Enter dimensions in the same unit. The result is in cubic units. For concrete volume, use our concrete calculator; for steel weight, use the steel weight calculator.
Understanding volume and when to use this calculator
Volume measures how much three-dimensional space an object occupies. Unlike area (which is two-dimensional), volume accounts for depth, so the result is in cubic units—cubic feet, cubic meters, cubic inches, and so on. Knowing the volume of a shape helps you plan storage, estimate materials, or compare container sizes.
A cube is the simplest shape: all sides are equal, so volume = side × side × side. A cylinder has a circular base and a height; its volume is the area of the circle (π × radius²) times the height. A sphere has no flat faces; its volume is (4/3) × π × radius³. These formulas are standard in geometry and engineering.
For construction, volume is essential when ordering concrete, gravel, or fill. A slab or footing is often a rectangular prism (length × width × depth), which you can compute with the area calculator for the base and multiply by depth, or use our dedicated concrete calculator. For cylindrical columns or tanks, the cylinder formula applies directly.
Keep units consistent: if you enter feet for all dimensions, the result is cubic feet. To convert between volume units (e.g. cubic feet to cubic yards), use our volume converter. This calculator runs in your browser and does not store your inputs.