Simply multiply your measurements for length and width to determine the area of your square or rectangular area in square inches. For example, let’s say that, for a rectangular area, you measure a length of 4 inches and a width of 3 inches. In this case, the area within your rectangle is 4 × 3 = 12 square inches.
Consequently, what is a cubic inch compared to an inch?
A cubic inch is a measure of volume that is equal to that of a cube measuring 1 inch (2.5 cm) on each side. An object’s volume in cubic inches is, thus, the same as that of a certain number of these hypothetical cubes.