Volume Calculator
Calculate the volume of cubes, spheres, cylinders, cones and more.
All calculations happen locally in your browser — nothing is uploaded, stored or tracked.
Pick a shape
Cube, box, sphere, cylinder, cone, pyramid or hemisphere.
Enter the dimensions
Fields adapt to the shape.
Read the volume
And surface area in the same units.
What Is a Volume Calculator?
A volume calculator finds how much space a three-dimensional shape occupies, measured in cubic units. It is used for shipping and storage planning, concrete and liquid quantities, aquarium sizing and geometry practice.
Seven shapes are covered: cube, box (rectangular prism), sphere, cylinder, cone, square pyramid and hemisphere. Each result includes the surface area as well as the volume.
Key Formulas
A cube is a box with equal sides; a pyramid uses one third of (base area × height); a hemisphere is half a sphere. All formulas are evaluated with full precision and rounded for display.
Your data never leaves your device.
Every calculation on this site runs in your browser using vanilla JavaScript. Nothing is uploaded, stored or tracked.
- 100% local, client-side calculations
- No data stored on any server
- No tracking, no analytics, no ads scripts
- Works offline once loaded
Frequently Asked Questions
How do I calculate the volume of a cylinder?
Multiply the area of the circular base (πr²) by the height. A cylinder with radius 3 and height 5 has volume 45π ≈ 141.4 cubic units.
How do I find the volume of a sphere?
Use V = 4/3 × π × r³. A sphere of radius 3 has volume 36π ≈ 113.1 cubic units.
What is the volume of a cone?
One third of the volume of a cylinder with the same base and height: V = 1/3 × π × r² × h.
Can I use this for shipping boxes?
Yes — the box mode gives cubic volume in whatever units you enter, e.g. cubic feet for freight quotes.
What is the difference between volume and capacity?
Volume is the space a shape occupies; capacity is what it can hold (e.g. litres in a tank). They use the same math with different units.