Hong Kong units of measurement

Hong Kong has three main systems of units of measurement in current use:

In 1976 the Hong Kong Government started the conversion to the metric system, and as of 2012 measurements for government purposes, such as road signs, are almost always in metric units. However, all three systems are officially permitted for trade, and in the wider society a mixture of all three systems prevails.

The Chinese system's most commonly used units were 里 (li), 丈 (tseung/cheung), 尺 (tsek/chek), 寸 (tsun/chun), 分 (fen/fan) in descending scale order. These units are now rarely used in daily life, the Imperial and Metric systems being preferred.

The Imperial system's units are written with the same basic Chinese characters as the Chinese system. In order to distinguish between the units of the two systems, the units can be prefixed with "Ying" (Chinese: 英) for the British Imperial system and "Wa" (Chinese: 華) for the Chinese system. In writing, derived characters are often used, with an additional 口(mouth) radical to the left of the original Chinese character, for writing Imperial units. The most commonly used units are the mile or "li" (Chinese: 哩), the yard or "ma" (Chinese: 碼), the foot or "chek" (Chinese: 呎), and the inch or "tsun" (Chinese: 吋).

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