What is area?Area is the space occupied by a flat shape or the surface of an object. The area of a shape can be measured by comparing the shape to squares of a fixed size. In the International System of Units (SI), the standard unit of area is the square meter, which is the area of a square whose sides are one meter long.
InputAcre is a unit of land area used in the imperial and US customary systems that is exactly equal to 4840 square yards or 1/640 of a square mile.
Square Kilometer is the area inside a square that has each side equal to 1 kilometer (1000 meters).