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This unit of measure as the inch used to measure length, width, height, thickness) of the subject (object). Cubes (cubic centimeters) are used to measure volume. Because before you can translate inches in Cuba, please specify which parameters were measured in centimeters.
If in centimeters measured the dimensions of the object, having the shape of a rectangular parallelepiped, then just multiply among themselves the numerical values of length, width, height (thickness) of the object. The result is the volume of the object, expressed in cubes (cm3).
Determine the number of cubes (volume) in a standard matchbox.
The decision
According to GOST 1820-2001 "Matches. Technical conditions", the size of a matchbox are:

Of 5.05 x 3.75 x 1.45 cm
To get the number of cubic centimeters, multiply these parameters:

5,05 * 3,75 * 1,45 = 27,459375 ≈ cm3 of 27.46.
If in inches set the height of the prism or cylinder, to translate those inches into cubes (determine volume), specify the area of the base figure and multiply the numerical value of this area to the height. The response, however, must be expressed in square centimeters (cm2). By the way, this method is suitable to calculate the volume of a rectangular parallelepiped, as a particular case of the prism.
Determine the number of cubes in a glass with a bottom area of 10 cm2 and a height of 20 centimeters.
The decision
As a glass can be considered a cylinder, multiply its height and footprint:

10*20=200 (cm3).
Answer: Cup volume – 200 cubic meters (cubic centimeters, cm3, ml, ml).
If in inches set the parameters of more complex shapes, to translate centimeters into cubes, use the formula calculates the volume of the shape. If the figure has a very complex geometric shape, then divide it (relatively) for a few more simple shapes and calculate the volume of each of them. Then, fold the amounts of the components of the figures.