Free Online Volume Calculator
A volume calculator returns the volume of common 3D solids — cube, box, sphere, cylinder, cone, and pyramid — from their measured dimensions.
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How to Use This Calculator
- Pick the 3D shape from the dropdown.
- Fill in the dimensions the solid needs.
- Read the volume and the formula used in the result panel.
What Is a Volume Calculator?
Each standard solid has a fixed volume formula. Cube = s³. Rectangular box = l × w × h. Sphere = (4/3) × π × r³. Cylinder = π × r² × h. Cone = (1/3) × π × r² × h — exactly one third of the cylinder with the same base and height. Rectangular pyramid = (1/3) × l × w × h — again, one third of the box it sits inside.
The one-third relationship for cone and pyramid is a classic geometry result and a useful sanity check: if your cone volume comes out larger than its enclosing cylinder, you've slipped a factor of three.
This tool picks the formula from a dropdown, asks for only the dimensions the solid needs, and returns the volume plus the formula. Units pass through — feed inches and you get cubic inches, feed cm and you get cubic centimetres (mL). Useful for sizing containers, computing material quantities, or checking homework.
Frequently Asked Questions
What's the formula for sphere volume?
How do I find cylinder volume?
What about irregular 3D shapes?
Published by the WeGotEveryTool team. We build and test every tool in-house and update pages when the underlying spec, formula, or recommendation changes.
Reviewed: May 2026. Disclaimer: this tool is provided as-is for general informational use. For decisions with material consequences (medical, legal, financial, security) verify results against a qualified professional source.
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