Convert Square Chain (ch²) to Arpent (arpent (area)) instantly.
About these units
Square Chain (ch²)
A square chain equals the area of a square one chain (~66 feet) per side, resulting in 4,356 square feet, or exactly 1/10 of an acre. This unit is closely linked to the chain, a surveyor's unit standardized by Edmund Gunter in the 17th century. Because 10 square chains make an acre, survey calculations for early colonial and American lands were extremely efficient. Square chains allowed surveyors to map and divide land rapidly using ropes or metal chains, producing a legacy seen in long, straight property lines still visible today across rural landscapes.
Arpent (arpent (area))
The arpent is a historical French land-measurement unit whose exact value varied across regions but is commonly taken as about 0.34 hectares, or roughly 3,400 square meters. The arpent was widely used in France before the metric system and carried over into French colonial territories, especially Louisiana, Quebec, and the Caribbean. In North America, the arpent became intertwined with colonial land grants, settlement patterns, and agricultural design. Properties in Louisiana often follow long, narrow "ribbon farms" extending from riverbanks, measured in arpents of frontage width. This arrangement maximized river access for transportation and irrigation, producing a unique landscape still visible today. Because of its regional variation, historians and land-survey experts must interpret arpents within local context. In Louisiana, an arpent is typically standardized to 0.84628 acres for legal purposes, but French historical documents may use values closer to half a hectare. The arpent thus reflects not only agricultural needs but also the administrative and cultural imprint of French colonization on North American geography.