Frequently asked questions
Which 3D shapes can this calculator handle?
It calculates the volume of five shapes: sphere, cylinder, cone, cube, and rectangular prism. Once you pick a shape, the relevant input fields (radius, height, side length, etc.) appear automatically.
What is the difference between volume and surface area?
Volume is the amount of 3D space a shape occupies, while surface area is the total area of all its outer surfaces. For example, volume tells you how much water a container holds, while surface area tells you how much material is needed to build it.
How does a cone's volume formula compare to a cylinder's?
A cylinder's volume is base area × height (πr²h), while a cone with the same base radius and height has exactly one-third of that volume (⅓πr²h). If radius and height match, the cone is always 1/3 the cylinder's volume.
Can I enter values in units other than centimeters?
Yes — the fields only accept numbers, so just be consistent with a single unit system. For instance, if you enter values in meters, interpret the result as cubic meters.
What happens if I enter zero or a negative number?
All dimensions must be greater than zero. Entering zero or a negative value triggers the "All values must be greater than 0" error and the calculation will not proceed.