The chain conversion selector above selects the length/distance measurement unit to convert to starting from chains (ch). To make a conversion starting from a unit of length other than chain, simply click on the "Reset" button.
The chain is a unit of length in the Imperial system of units equal to approximately 20.1168 meters (1 ch ≈ 20.1168 m), the base unit of length in the International System of Units (SI).
The chain (ch) is also equal to 0.0201168 kilometers (km) (an SI unit of length), or 4 rods or 100 links (Gunter's survey units of length), or 66 feet (ft) or 22 yards (yd), which are US customary / Imperial units of length.
Also known as: Gunter's chain, Surveyor's chain, or land chain