square inches
A square inch is a unit of area measurement in the imperial system. It represents the area of a square with each side measuring one inch long. Square inches are commonly used to measure small surfaces, such as pieces of paper, fabric, or tiles.
To calculate the area in square inches, you multiply the length by the width of a surface measured in inches. For example, a rectangle that is 3 inches long and 4 inches wide has an area of 12 square inches. This measurement is useful in various fields, including architecture, carpentry, and crafting.