Does it matter what unit I enter?

No — the calculator is unit-agnostic; the output unit is simply the cube of whatever unit you entered.

Can I compute an irregular solid's volume?

Split it into these 5 basic solids where possible and add the volumes together.

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Math & Everyday

Volume Calculator

Volume of a cube, box, cylinder, sphere, or cone from its dimensions.

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About the Volume Calculator

Computes the volume of five common solids — cube, rectangular prism (box), cylinder, sphere, and cone — from their dimensions, using the standard geometry formula for each.

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How to use it

Pick a shape.
Enter its dimensions.
Read the computed volume.

Formula

Cube: side³. Box: length × width × height. Cylinder: π × radius² × height. Sphere: (4/3) × π × radius³. Cone: (1/3) × π × radius² × height.

Worked example

A cylinder with radius 2 and height 10: π × 2² × 10 = 125.66. A sphere with radius 3: (4/3) × π × 3³ = 113.10.

Volume formulas by shape

Volume formulas by shape
Shape	Formula
Cube	side³
Box	length × width × height
Cylinder	π × radius² × height
Sphere	(4/3) × π × radius³
Cone	(1/3) × π × radius² × height

Interpreting your result

Unit-agnostic. A cone's volume is exactly one-third of a cylinder with the same base and height.

Recommendations

• A cone always has exactly ⅓ the volume of a cylinder sharing the same radius and height.
• For a box, make sure all three dimensions use the same unit before entering them.
• Doubling a sphere's radius multiplies its volume by 8 (radius is cubed), not 2.

Frequently asked questions

It's a geometric identity — a cone tapering to a point from the same circular base and height always encloses exactly one-third the volume of the equivalent cylinder.