Volume Calculator
Free volume calculator for 3D shapes: cube, sphere, cylinder, cone, and box. Enter dimensions and get the volume instantly with the formula shown.
About this tool
Volume tells you how much space a three-dimensional object takes up - or how much it can hold. From the concrete for a patio to the water in a fish tank to the soil for a garden bed, volume math comes up constantly in real life.
Pick your shape, enter its dimensions, and this volume calculator gives you the answer instantly, with the formula shown so you can check the work.
How to use
Choose a shape: cube, sphere, cylinder, cone, or box. Only fill in the dimensions your shape needs - for example, a sphere needs just the radius, while a box needs length, width, and height.
Press Calculate Volume. The result appears immediately in cubic units matching whatever units you measured in.
The math behind it
Each shape has its own formula: cube = side^3; sphere = 4/3 x pi x r^3; cylinder = pi x r^2 x h; cone = (pi x r^2 x h) / 3; box = length x width x height.
Keep all dimensions in the same units - mixing centimeters and meters is the most common mistake.