First, you need to determine the shape of the object to know which formula to use.

In general, you'll start with three numbers because you are measuring three-dimensional objects.

When you use a formula for an area the number gets squared. For volume, the number gets cubed.

### Cube or Rectangle

To calculate the volume of a box you multiply the length, width, and height.

For a cube they are all the same, so you can multiply the single number to the third power.

Using the formula above, your cube would have a height, length, and width of 2 inches. While the total volume of the cube is 8.

### Ball or Cylinder

How to calculate the volume of a circle shaped object starts with finding the radius.

For a ball, you need to multiply the radius by (pi) and 4/3.

For a cylinder, you need to include the height of the cylinder. Think of a cylinder as two circles with space in between.

Sphere Volume= 4/3 x (pi) x radius to the power of 3

Cylinder volume= height x (pi) x radius to the power of 2

### Cone

The volume of a cone gets more complicated.

Cone volume = 1/3 x (pi) x height x radius to the second power.

The radius is a straight line from the center to the outer edge of the widest part of the cone.

### Odd Shapes

The best way to tackle calculating an odd shape is to break it down into simpler shapes. Start by breaking the shape down into a cube, cylinder, or sphere. Once you figured out the volume for the individual shapes you can add the individual volumes.