Kilometer
A kilometer (km) is a unit of length in the metric system, used to measure long distances. One kilometer equals 1,000 meters or about 0.62 miles. Kilometers are commonly used to measure distances between cities, in road signs, and in running or walking events. For example, a marathon is 42.195 kilometers long. The symbol for kilometer is "km". Most countries around the world use kilometers instead of miles for speed and distance, especially in transportation. Because it covers a large distance, the kilometer is not used for measuring small objects but is perfect for travel and mapping.
Chain
A chain is a unit of length traditionally used in land surveying. The most common version is the Gunter’s chain, which equals 66 feet or 22 yards, approximately 20.1168 meters.
The chain was introduced by English clergyman Edmund Gunter in the 17th century to simplify land measurement. One chain consists of 100 links, each 0.66 feet long. It became a standard unit in British and American land surveying and was instrumental in defining land areas, especially in the U.S. Public Land Survey System.
Key Conversions:
1 chain = 66 feet
1 chain = 22 yards
1 chain ≈ 20.1168 meters
10 chains = 1 furlong
80 chains = 1 mile
Though now largely replaced by metric units and modern surveying tools, the chain still appears in older land deeds, maps, and rural property descriptions.
No conversions available for length.