How many square feet are there in an acre?

An acre is defined as a unit of area that is commonly used in the United States and other countries that do not utilize the metric system as their primary measurement. The correct measurement for one acre is 43,560 square feet. This figure is derived from historical land measurement systems and is important for a variety of applications, including agriculture, real estate, and land development, especially in relation to fumigation practices where property size may matter for compliance and efficacy. Understanding the square footage in relation to an acre is fundamental for calculating the required amount of fumigant or assessing treatment areas.