Hong Kong units of measurement
- The Qing Empire (no longer in widespread use in mainland China);[citation needed]
- British Imperial units; and
- The metric system.
In 1976 the
Length
The metric system is used for all official purposes in Hong Kong, however, the imperial system is sometimes used in informal situations.
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. The legal units for trade include 尺, 寸 and 分 only, but they are no longer in daily use, with the words 尺 and 寸 commonly understood as the imperial measure foot (Chinese: 呎) and inch (Chinese: 吋) which are pronounced the same.
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 (
Rulers and tapes on the market normally have dual markings in centimetres and feet and inches, which are both commonly used for body measurements.
Transport
All modern roads and railways are measured, built and signposted in the metric system.
All the imperial speed limit signs were replaced within 3 days in 25 August 1984 to 27 August 1984 upon enactment of new traffic law, with a temporary territory-wide speed limit of 50 km/h in force within that 3 days, while all remaining road signs were gradually replaced within the following 3 years.[2]
Starting in 2001, speed limit signs showing the word km/h were gradually replaced with signs showing number only, to improve readability as drivers had already accustomed to the metric system.[3] As a result, speed limit signs in Hong Kong now look identical to those in the UK, but with different meanings.
However, some old signs showing dual measures still exists, for example, the height restriction at the entrance of old buildings.
The old trunk roads built in the early 20th century connecting
When the
Sports facilities
All public running tracks and swimming pools are built in metric, with running tracks having international-standard 400 m laps, and most swimming pools in international-standard 50 m length, and the smaller pools 25 m length.
The two racecourses, Happy Valley Racecourse and Sha Tin Racecourse, are marked in metres and races run in metres.
Topological maps published by the government uses the Military Grid Reference System, with squares being 1 km x 1 km in size.
Weight
Chinese, Imperial and metric weight units are all used in Hong Kong. The choice of system depends on the type of goods and their origins. Metric is used for all official purposes, for example the Post Office and Road signs.[9][10] Packaged food weights and volumes may be given using any of the three systems of units.[11]
Public scales in wet markets are in all three units. These are provided to deter dishonesty by wet market merchants.[12]
Traditional weights are still de facto standard in certain areas. For example,
Precious metals (gold, silver and platinum) are traded in the Chinese troy weight system, which differs from other goods.
Area
The standard commercial measure of real estate area is in
: fōng chek, pìhng fōng chek) of the Imperial system. Apartment or office size is generally still given in square feet. However, square metres are used for official purposes.The traditional units of agricultural land area are the mau (畝, a unit used throughout China) and the local dau chung (斗種). Notionally the two units are defined differently, with the dau chung being the amount of land which could be planted by one dau (斗) of rice; in practice that area of land is roughly equal to one mau, though the exact area of a dau chung traditionally could vary based on soil quality.[13] In Hong Kong, neither the mau nor the dau chung is a statutory unit allowed for use in trade;[14] however, the Agriculture, Fisheries and Conservation Department continues to use the dau chung for some administrative purposes, defining it as equivalent to 7,260 square feet (674 m2).[15]
Volume
In Chinese system, the measurement of volume of rice is 斗 (dau) but it is replaced by packaged rice in weight. The volume of water and fuel is the litre. The gallon (加侖, ga-lun) of the Imperial system is still occasionally used.
Time
Time measurement follows the international system. Gregorian calendar is usually used, but the Chinese calendar also plays a very important role in everyday life and in telling the dates of traditional festivals.
In the following table, multiple Chinese names are listed in the order of usage frequency.
English name | Chinese name | Cantonese pronunciation | Equivalent in other units | Notes |
---|---|---|---|---|
Year (Gregorian) | 年 | nin4 | 365 or 366 days | Roughly follows a solar cycle. Historically, the Chinese refer to the return of the Sun in the winter solstice as "歲" (seui3). |
Year (Chinese) | 年 | nin4 | 12 or 13 Chinese months | In Chinese years with 13 months, the 13th month is known as the intercalary month .
|
Month (Gregorian) | 月 | yut6 | 28, 29, 30 or 31 days | The Gregorian month lost the meaning of the lunar cycle .
|
Month (Chinese) | 月 | yut6 | 29 or 30 days | Roughly in sync with the lunar cycle
|
Day | 日 | yat6 | 24 hours | |
Hour | 鐘 / 鐘頭 / 小時 | jung1 / jung1-tau4 / siu2-si4 | 4 quarters or 60 minutes | "鐘" also means "clock" or "bell", which usually chimes every hour. |
Quarter | 骨 | gwat1 | 15 minutes | "骨" is the Cantonese loanword for "quarter". |
字 | ji6 | 5 minutes | "字" is very commonly used in colloquial speech, more so than "分鐘". | |
Minute | 分鐘 / 分 | fan1-jung1 / fan1 | 60 seconds | |
Second | 秒 | miu5 |
Energy
The kilojoule or kilocalorie is the unit used for the measurement of energy in food. The British thermal unit (BTU) is still used to measure the output of air conditioners.
Power
Horsepower (馬力) is still the dominant measurement for the power of cars . The Chinese counting word 匹 (pat) is the measure word in Chinese, carried over from the measure word of horses.
See also
- Systems, & History of measurement
- Chinese & Taiwanese units of measurement
- Korean, & Vietnamese units of measurement
- US units of measurement
References
- ^ Cap 68 Sched 2 UNITS OF MEASUREMENT AND PERMITTED SYMBOLS OR ABBREVIATIONS OF UNITS OF MEASUREMENT LAWFUL FOR USE FOR TRADE
- ^ 全港道路限制車速 以便更換交通標誌, 香港工商日報
- ^ 立法會交通事務委員會 香港的速度限制, 運輸局, 2000-01-24
- ^ "道路里程碑". 香港地方. Archived from the original on 2018-02-16. Retrieved 2020-06-11.
- ^ "「8咪半」". www.eightandahalf.com.hk (in Chinese (Taiwan)). Retrieved 2018-04-06.
- ^ A collection can be seen at this forum post
- ^ "British railway signalling and MTR East Rail". Checkerboard Hill.
- ^ ENR 1.7 Altimeter Setting Procedures, Civil Aviation Department Hong Kong
- ^ Hong Kong Post Pricing by Weight
- ^ Hong Kong Road Rules
- ^ Cap 132W Sched 3 MARKING AND LABELLING OF PREPACKAGED FOODS
- ^ Hong Kong Customs and Excise Department - Advice to Consumers
- ISBN 0520010248.
- ^ Weights and Measures Ordinance, Cap. 68; Weights and Measures Order, Cap. 68A
- ^ "Technical support and financial assistance: Loan Fund and Emergency Relief". Agriculture, Fisheries and Conservation Department. Retrieved 4 July 2022.