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Instant Calculation
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Volume formulas differ by shape, and keeping five different formulas straight is easy to get wrong without a reference.
This calculator finds the volume of a cube, rectangular prism (box), sphere, cylinder, or cone from its dimensions.
How it works
Choose a shape, then enter the required dimensions (a single side or radius for a cube or sphere; length, width, and height for a box; radius and height for a cylinder or cone). The calculator applies the matching standard volume formula for that shape.
- Enter shape.
- Enter side / length / radius.
- Enter width / height (not used for cube or sphere).
- Enter height (box only).
- Click Calculate to see your results.
Examples
Sphere, radius 3
A sphere with a radius of 3 has a volume of about 113.10 cubic units.
Box, 4×5×6
A rectangular prism measuring 4 by 5 by 6 units has a volume of 120 cubic units.
Who should use it
- Solving geometry homework problems involving 3D shapes.
- Estimating material or container volume for a practical project.
Industry applications
- Mathematics education
- Construction, packaging, and manufacturing
Advantages
- Covers five common shapes in a single calculator.
- Shows the specific formula used for the selected shape.
Limitations
- Doesn't cover irregular or composite shapes made of multiple combined solids.
Common mistakes to avoid
- Entering a diameter instead of a radius for spheres, cylinders, or cones, which doubles the expected input.
- Mixing units between dimensions (e.g., length in feet, height in inches) on a box, cylinder, or cone.
Best practices
- Double-check whether a measurement you're given is a radius or a diameter before entering it — this is the most common source of volume calculation errors.
Tips
- For a cone, remember it holds exactly one-third the volume of a cylinder with the same base radius and height — a useful sanity check on the result.