Definition:Imperial/Length/Chain

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Definition

The chain is an imperial unit of length.

\(\displaystyle \) \(\) \(\displaystyle 1\) chain
\(\displaystyle \) \(=\) \(\displaystyle 4\) rods, poles or perches
\(\displaystyle \) \(=\) \(\displaystyle 22\) yards
\(\displaystyle \) \(=\) \(\displaystyle 66\) feet
\(\displaystyle \) \(=\) \(\displaystyle 20 \cdotp 1168\) metres


Historical Note

The chain was invented by Edmund Gunter for the purpose of land surveying.

The original Gunter's chain was a physical chain, $66$ feet in length, of $100$ links.


Sources