How many square feet are there in one acre?

One acre is defined as a unit of area that is equivalent to 43,560 square feet. This measurement is based on historical land surveying practices and is a standard used in real estate and land management. The figure is derived from a rectangular plot of land that measures 66 feet wide by 660 feet long, which equals 43,560 square feet. This standardized measurement is crucial for various applications, including property assessments, zoning regulations, and agricultural planning. By understanding that one acre corresponds specifically to 43,560 square feet, individuals can accurately assess land size, make comparisons between properties, and calculate land use efficiently.