What is square yard?
A square yard is a unit of area in imperial and US customary systems equal to 9 square feet. It is used in carpet and fabric measurement, as well as in construction and landscaping in the United States.
What is square inch?
A square inch is a unit of area in imperial and US customary systems equal to 1/144 of a square foot. It is used for measuring small surfaces, printed circuit boards, and product specifications in imperial-based industries.