Convert chain (US survey) to foot (US survey) Online | Free Length Converter
Chain (US Survey)
The US survey chain is a unit of length used historically in land surveying in the United States. It is defined as exactly 66 US survey feet, which is slightly longer than the international foot. Since one US survey foot equals about 0.3048006096 meters, the US survey chain is approximately 20.11684 meters long.
Like the standard chain, it is divided into 100 links, each measuring 0.66 US survey feet. The US survey chain was widely used in the Public Land Survey System to measure land parcels and boundaries.
Key facts:
1 US survey chain = 66 US survey feet
1 US survey chain ≈ 20.11684 meters
10 US survey chains = 1 furlong
80 US survey chains = 1 US survey mile
Though the US survey foot and chain are being phased out in favor of international units, the US survey chain still appears in historical land records and some legal contexts.
Foot (US Survey)
The US survey foot is a unit of length used historically in the United States for land surveying and mapping. It is defined as exactly 1200/3937 meters, which is approximately 0.3048006096 meters. This makes it very slightly longer than the international foot, which is exactly 0.3048 meters.
The US survey foot was established to maintain consistency with earlier land surveys and legal descriptions in the U.S. It was used extensively in the Public Land Survey System and other cadastral surveys.
Key points:
1 US survey foot = 1200/3937 meters ≈ 0.3048006096 meters
Slightly longer than the international foot by about 0.0006 millimeters
Used primarily in land surveying and legal documents
As of recent years, the US has been phasing out the US survey foot in favor of the international foot for standardization.
Though nearly identical to the international foot, the US survey foot remains important for understanding older land records and measurements.
No conversions available for length.