How to convert acres to square feet
To convert a measurement in acres to square feet, multiply the value by 43,560. The conversion factor comes from the relationship between both units and the square meter.
For example, to convert 5 ac to square feet: 5 × 43,560 = 217,800 ft².
What is a acre?
An acre is an imperial and US customary unit of area equal to 43,560 square feet, or about 4,046.86 square meters (roughly 0.405 hectares). The acre originally meant the area a yoke of oxen could plow in a day, standardized as 1 chain by 1 furlong (66 by 660 feet). It remains the standard unit for land and farm area in the US and UK.
Common uses of acres include: Farmland and rural land size; Residential lot and property size in the US; Real estate and development parcels; Sports field and park area references.
What is a square foot?
A square foot is an imperial and US customary unit of area equal to the area of a square one foot on each side, about 0.0929 square meters. The square foot is the dominant unit for floor area in US and UK real estate, where home and office sizes are quoted in square feet. It remains the everyday area unit throughout the imperial world.
Common uses of square feet include: Home and office floor area in the US and UK; Real estate listings and rent per square foot; Flooring, tiling, and paint coverage; Retail and commercial space sizing.
When you need to convert acres to square feet
Converting acres to square feet is common in US real estate and land development, where lot sizes are advertised in acres but building footprints and setbacks are calculated in square feet. One acre is exactly 43,560 square feet.
Acres to square feet worked examples
Here are some common values converted:
1 ac = 43,560 ft² 5 ac = 217,800 ft² 10 ac = 435,600 ft² 50 ac = 2,178,000 ft² 100 ac = 4,356,000 ft²
Frequently asked questions
How many square feet are in one acre?
One acre (ac) equals 43,560 square feet (ft²). Multiply any value in acres by 43,560 to convert to square feet.
How do I convert acres to square feet?
Multiply the value in acres by 43,560. For example, 5 ac × 43,560 = 217,800 ft².
How do I convert square feet to acres?
Multiply the value in square feet by 0.000022956841, or divide by 43,560. Use the swap button on the converter above to reverse the direction.
Is the acre to square foot conversion exact?
Yes. Area conversions derive from the exact 1959 international definitions of the meter, yard, and foot, so the factors are exact.
What is the formula for acres to square feet?
The formula is: ft² = ac × 43,560. This comes from the definition of both units relative to the square meter.