Sq In
Square inches are a unit of area measurement of a space. They are also referred to as inches
squared. One square inch is equal to the area of a square with each side equal to one inch in
length.
Of course, not all areas are perfect squares, but you can still calculate the area in square
inches of a variety of shapes. For example, calculating the area of a rectangular shape can be
done in a few easy steps.
The first step to calculate the area of a rectangle in square inches is to measure the length and
width of the area in inches using a ruler or tape measure.
If your measurement is in another unit of measure, such as centimeters, then you’ll need to
convert to inches first. Use our length converter to convert your units to inches.
The next step is to multiply the length and width to obtain the result in square inches. The square inches formula is:
Thus, the area is equal to length times width, both measured in inches. This is the same formula used to calculate square footage, except there the units of length and width are in inches rather than feet.
If the area for which you are trying to calculate is not a rectangle, you can instead use the appropriate formula below to find the area in square inches for several shapes. Remember, in order for the area to have units of square inches, the dimensions of the shapes must be measured in inches.