From ProofWiki
Jump to navigation Jump to search

This page is about Chain in the context of Linear Measure. For other uses, see Chain.


The chain is an imperial unit of length.

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