Volume Calculator

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Calculate the volume and surface area of a box, sphere, cylinder, cone, pyramid or capsule. Pick a shape, enter the dimensions and get instant results. Free.

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Volume – cubic units
Surface area –
Enter dimensions in the same unit; volume is in cubic units and surface area in square units. The pyramid assumes a square base; the capsule is a cylinder with two hemispherical caps.

About Volume Calculator

The volume calculator computes the volume and surface area of six 3D solids: box, sphere, cylinder, cone, square-based pyramid and capsule — a cylinder capped with two hemispheres. Choose the shape, type the dimensions and both figures appear at once.

Each solid uses its textbook formula: length × width × height for a box, 4⁄3πr³ for a sphere, πr²h for a cylinder and one third of that for a cone. Surface area is computed alongside, which is handy when you also need to paint, wrap or insulate the object.

Reach for it in geometry class, when sizing tanks, planters and containers, or when estimating how much material fills a mold. It is free and calculates live in your browser.

How to use Volume Calculator

  1. Pick the shape: box, sphere, cylinder, cone, pyramid or capsule.
  2. Enter the requested dimensions — radius, height, side lengths — in one consistent unit.
  3. Read the volume in cubic units and the surface area in square units.

Frequently asked questions

A cylinder with a hemispherical cap on each end, like a pill. Its volume is the cylinder part plus a full sphere of the same radius, and the tool asks for the radius and the cylinder height.

Yes, this calculator assumes a square base: volume = base side² × height ÷ 3. For a rectangular base you can adapt by computing the base area separately.

Whatever unit you enter, cubed for volume and squared for surface area. Enter centimeters and you get cm³ and cm²; enter feet and you get ft³ and ft².

Work in centimeters or meters first: 1,000 cm³ equals 1 liter and 1 m³ equals 1,000 liters (about 264 US gallons). A dedicated unit converter can finish the job.

A cone’s volume is precisely one third of the cylinder that shares its radius and height — πr²h ÷ 3. It is a classic geometric relationship, and the calculator reflects it exactly.
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