1 Square Foot equals 2.29568e-5 Acres.
| Square Foot (ft²) | Acre (ac) |
|---|---|
| 0.001 ft² | 2.29568e-8 ac |
| 0.01 ft² | 2.29568e-7 ac |
| 0.1 ft² | 2.29568e-6 ac |
| 1 ft² | 2.29568e-5 ac |
| 2 ft² | 4.59137e-5 ac |
| 5 ft² | 0.000114784 ac |
| 10 ft² | 0.000229568 ac |
| 25 ft² | 0.000573921 ac |
| 50 ft² | 0.00114784 ac |
| 100 ft² | 0.00229568 ac |
| 500 ft² | 0.0114784 ac |
| 1,000 ft² | 0.0229568 ac |
To convert Square Feet to Acres, multiply the value by 2.29568e-5. This factor comes from the ratio of the two units' definitions: one Square Foot equals 2.29568e-5 Acres.
For example: 1 Square Foot = 2.29568e-5 Acres, and 10 Square Feet = 0.000229568 Acres.
To convert in the reverse direction — from Acres to Square Feet — multiply by 43,560.
The square foot (ft²) is the area of a square with sides one foot long, equal to 144 square inches or approximately 0.0929 square meters. It is the primary unit for measuring residential and commercial floor area in the United States, and is used in Canada and the United Kingdom for real estate. A typical US one-bedroom apartment runs 600–800 ft²; the average new single-family US home is about 2,300 ft²; and a regulation NBA basketball court is 4,700 ft².
Real estate listing prices in the US are often quoted per square foot, allowing comparison between properties of different sizes: a city center apartment at $700/ft² is expensive; a suburban house at $150/ft² is more typical for many US markets. Flooring materials — hardwood, carpet, tile — are sold by the square foot, and contractors provide labor quotes per square foot for painting, roofing, and other surface-area work.
Solar panel output per square foot is a relevant calculation for US homeowners assessing rooftop installation feasibility. Office space leasing in the US is negotiated and priced per square foot. Building codes specify minimum room sizes in square feet. The square foot is so embedded in US residential life that metrication campaigns have repeatedly failed to displace it, despite the overwhelming use of square meters in the rest of the world.
The acre is a unit of land area equal to exactly 43,560 square feet, or approximately 4,047 square meters (0.4047 hectares). Its origins lie in medieval English agriculture: an acre was the amount of land that a yoke of oxen could plough in a single day — roughly a strip of land one furlong (660 feet) long and one chain (66 feet) wide. The "chain" measurement is why surveyors' chains are exactly 66 feet: four chains (264 feet) by ten chains (660 feet) equals one acre.
The acre remains the standard land measurement unit in the United States, where farmland, suburban lot sizes, and rural properties are universally measured in acres. A football field (including end zones) is about 1.32 acres; a typical suburban home lot in the US is 0.2–0.5 acres; and the 100,000-acre ranch is a recognizable large-scale farming unit. US land surveys use sections (640 acres = one square mile), townships (36 sections = 36 square miles), and ranges as the organizing framework.
The acre persists in the UK for agricultural land — farm sizes in England are quoted in acres in rural publications and land sales — even though the UK officially adopted metric units for most other purposes. Land registration in England and Wales uses hectares, but the acre's cultural resilience means both units appear in property descriptions. One acre is about 40% of a hectare, making the conversion "multiply acres by 0.4 to get approximate hectares" a rough but useful mental shortcut.
1 Square Foot equals 2.29568e-5 Acres.
To convert Square Feet to Acres, multiply by 2.29568e-5. For example, 100 Square Feet = 0.00229568 Acres.
1 Acre equals 43,560 Square Feet.