Link (li)

US & ImperialTraditional unit (still used in some regions)

One hundredth of a chain, 7.92 inches (0.201168 m). A surveying unit, one link of Gunter's chain.

1 link = 0.201168 meters (exactly).

About the link

Each link is the small piece that makes up a surveyor's chain, and the chain's hundred links gave decimal fractions to a system built on feet and yards. A single link measures 7.92 inches, or exactly 0.201168 m, because it is one hundredth of a 66-foot chain. Because of that, distances could be recorded in whole chains and links without fractions.

Edmund Gunter introduced the 100-link chain in England in 1620, and the link spread across the English-speaking world with it. Twenty-five links make a rod, 1,000 make a furlong and 8,000 make a mile. The exact size depends on which foot is used: the pre-1959 imperial foot gives about 201.1677 mm, the US survey foot about 201.1684 mm, and the international foot exactly 201.168 mm. Since the US survey foot was retired after 2022, the international value applies there too. Metric and electronic surveying replaced links in the twentieth century, though old deeds still use them.

Sources: Wikipedia: Link (unit); Wikipedia: Chain (unit)

Link conversion chart

1 link expressed in every other length unit:

More US & Imperial units

• inch (length)
• foot (length)
• yard (length)
• mile (length)
• thou (length)
• league (length)
• furlong (length)
• chain (length)
• rod (length)
• hand (length)
• pound (weight & mass)
• ounce (weight & mass)
• grain (weight & mass)
• dram (weight & mass)
• cubic inch (volume)
• cubic foot (volume)

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