Convert Township (township) to Square Chain (ch²) instantly.
About these units
Township (township)
A township, as used in the U.S. Public Land Survey System (PLSS), is an area equal to 36 square miles, arranged as a 6-mile × 6-mile square. It is a cornerstone unit of American land division, originating during the late 18th-century settlement of the American frontier. Townships standardized how land was surveyed and sold, allowing the federal government to systematically divide territory for settlement, homesteading, and revenue generation. They were subdivided into 36 sections, each one square mile in area. This grid-based system profoundly shaped American geography. Roads, property lines, agricultural fields, and county boundaries in much of the Midwest and West follow township geometry. Even today, PLSS townships remain legally relevant in land deeds, zoning regulations, and cadastral surveys.
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.