Acre (US Survey) [ac]
The acre (US survey) is a unit of area used mainly in the United States for land measurement, based on the US survey foot. It is slightly different from the international acre due to the foot definition.
1 US survey acre = 43,560 US survey square feet
1 US survey acre โ 4,046.87261 square meters
Slightly larger than the international acre by about 0.0005%.
It is commonly used in land surveying, real estate, and agriculture.
Cuerda
A cuerda is a traditional unit of area used mainly in Puerto Rico to measure land.
1 cuerda โ 3,930 square meters โ 0.97 acres.
It is commonly used in real estate and agriculture on the island.
The cuerda remains a popular local measurement for land despite the use of metric units.