how big is one acre

One acre is 43,560 square feet, which is about 4,840 square yards or approximately 4,047 square meters (0.4047 hectares). It can be visualized as roughly 90% of a standard American football field (excluding end zones), or a square about 208.7 feet on each side. Traditionally, it was defined as an area one chain (66 feet) by one furlong (660 feet), which equals 43,560 square feet. The shape of an acre is not fixed and can vary as long as the area totals 43,560 square feet. This unit of measurement is commonly used in the United States and other countries for land measurement.