Convert acres to square feet and 7 other area units instantly. Includes landmark comparisons, lot equivalents, and a visual size reference chart.
One acre equals exactly 43,560 square feet — a number that appears constantly in real estate listings, zoning documents, and agricultural records. Despite its ubiquity, the acre-to-square-feet conversion is easy to forget because 43,560 is not a round number. This converter eliminates the mental math and extends the result to seven additional area units including square meters, hectares, and square miles.
Whether you are evaluating a ¼-acre suburban lot, comparing farmland parcels, or sizing a commercial development, this tool provides instant results alongside visual comparisons to familiar landmarks like football fields and city blocks. Preset buttons cover the most common parcel sizes from a quarter acre to a full section (640 acres = 1 square mile).
Real estate professionals, farmers, land surveyors, and homeowners all deal with acres regularly. This calculator makes it simple to translate listings into the square-foot figures that are more intuitive for residential buyers, or to convert square footage back to acres for agricultural and zoning contexts.
Remembering that 1 acre = 43,560 sq ft is tricky, and chaining additional conversions to hectares or square meters is error-prone. This tool converts in both directions and outputs eight area units at once, saving multiple lookups. The landmark comparison bars help you visualize how large a parcel really is.
Square Feet = Acres × 43,560 Acres = Square Feet ÷ 43,560 1 acre = 4,046.86 m² = 4,840 yd² = 0.4047 ha = 1/640 sq mi
Result: 108,900 sq ft
2.5 acres × 43,560 = 108,900 square feet. That is roughly the size of an average city block, or about 10,117 square meters.
The acre originated in medieval England as the area that a yoke of oxen could plow in one day. It was standardized in the 13th century as 1 chain (66 feet) by 1 furlong (660 feet) = 43,560 square feet. Today the international acre is defined in terms of the international yard, making it exactly 4,046.8564224 square meters.
US real estate listings use both acres and square feet depending on the property type. Residential lots under 1 acre are typically listed in square feet, while farms, ranches, and rural properties are listed in acres. Zoning codes specify minimum lot sizes in acres — for example, R-1 zoning might require 0.5 acres per dwelling.
Real-world parcels are rarely perfect rectangles. Surveyors divide irregular shapes into triangles and trapezoids, calculate each sub-area, and sum the results. GIS software automates this from boundary coordinates. If you have a plat map with dimensions in feet, compute the total square footage first, then divide by 43,560 to get acres.
Exactly 43,560 square feet. This comes from the historical definition: 1 acre = 1 chain × 1 furlong = 66 ft × 660 ft.
An acre is roughly 90% of a football field (without end zones), or about 208.7 ft × 208.7 ft if square.
Multiply acres by 0.404686. For example, 10 acres = 4.047 hectares.
A section is 640 acres (1 square mile). It is the basic unit in the US Public Land Survey System used in 30 states.
The international acre (43,560 sq ft) is standard. The Scottish acre and Irish acre were historically larger but are no longer in official use.
US suburban lots range from 0.1 acres (4,356 sq ft) in dense suburbs to 0.5+ acres in rural-suburban areas. The national median is about 0.19 acres.