Square Foot
A square foot (ft²) is a popular area measurement in the US, based on a square with sides one foot long. It is widely used in construction, home layouts, painting coverage, and room dimensions — making it a central unit for homeowners and professionals.
Square feet give a realistic reference for everyday living spaces and material estimates. When comparing internationally, converting to square meters becomes essential.
Square Inch
A square inch (in²) is a US customary unit used for measuring small surface areas. It represents the space within a one-inch square. Square inches appear in hardware, packaging labels, and electronics, especially where compact and detailed sizing matters.
In global manufacturing, products often list both square inches and square centimeters, making conversion essential for compatibility across regions.