Chapter: | 68 | Title: | WEIGHTS AND MEASURES ORDINANCE | Gazette Number: | |

Schedule: | 1 | Heading: | DEFINITIONS OF UNITS OF MEASUREMENT | Version Date: | 30/06/1997 |

[section 6(2)]

PART I

**Measurement of Length **

(a) Metric Units

- 1 kilometre
| = 1000 metres |

1 metre | = the length of the path travelled by light in vacuum during a time interval of 1/299792458 of a second |

1 decimetre | = 0.1 metre |

1 centimetre | = 0.01 metre |

- 1 millimetre
| = 0.001 metre |

(b) Imperial Units

- 1 mile
| = 1 760 yards |

- 1 furlong
| = 220 yards |

- 1 chain
| = 22 yards |

- 1 yard
| = 0.9144 metre exactly |

- 1 foot
| = 1/3 yard |

- 1 inch
| = 1/36 yard |

(c) Chinese Units

- 1 chek
| = 0.371475 metre |

- 1 tsun
| = 0.1 chek |

- 1 fan
| = 0.1 tsun |

PART II

(a) Metric Units

- 1 hectare
| = 100 ares |

- 1 are
| = 100 square metres |

- 1 square metre
| = an area equal to that of a square each side of which measures one metre |

- 1 square decimetre
| = 0.01 square metre |

- 1 square centimetre
| = 0.01 square decimetre |

- 1 square millimetre
| = 0.01 square centimetre |

(b) Imperial Units

- 1 square mile
| = 640 acres |

- 1 acre
| = 4840 square yards |

- 1 rood
| = 1210 square yards |

- 1 square yard
| = an area equal to that of a square each side of which measures one yard |

- 1 square foot
| = 1/9 square yard |

- 1 square inch
| = 1/144 square foot |

PART III

(a) Metric Units

- 1 cubic metre
| = a volume equal to that of a cube each edge of which measures one metre |

- 1 cubic decimetre
| = 0.001 cubic metre |

- 1 cubic centimetre
| = 0.001 cubic decimetre |

- 1 litre
| = a volume equal to that of a cubic decimetre |

- 1 decilitre
| = 0.1 litre |

- 1 centilitre
| = 0.01 litre |

- 1 millilitre
| = 0.001 litre |

(b) Imperial Units

- 1 cubic yard
| = a volume equal to that of a cube each edge of which measures one yard |

- 1 cubic foot
| = 1/27 cubic yard |

- 1 cubic inch
| = 1/1728 cubic foot |

PART IV

(a) Metric Units

- 1 hectolitre
| = 100 litres |

- 1 litre
| = a volume equal to that of a cubic decimetre |

- 1 decilitre
| = 0.1 litre |

- 1 centilitre
| = 0.01 litre |

- 1 millilitre
| = 0.001 litre |

(b) Imperial Units

- 1 gallon
| = 4.54609 cubic decimetres |

- 1 quart
| = 1/4 gallon |

- 1 pint
| = 1/2 quart |

- 1 gill
| = 1/4 pint |

- 1 fluid ounce
| = 1/20 pint |

PART V

(a) Metric Units

- 1 tonne
| = 1000 kilograms |

- 1 kilogram
| = a unit of mass equal to the international prototype of the kilogram kept by the International Bureau of Weights and Measures |

- 1 gram
| = 0.001 kilogram |

- 1 metric carat
| = 1/5 gram |

- 1 milligram
| = 0.001 gram |

(b) Imperial Units

- 1 ton
| = 2240 pounds |

- 1 hundredweight
| = 112 pounds |

- 1 quarter
| = 28 pounds |

- 1 stone
| = 14 pounds |

- 1 pound
| = 0.45359237 kilogram exactly |

- 1 ounce
| = 1/16 pound |

- 1 dram
| = 1/256 pound |

- 1 grain
| = 1/7000 pound |

- 1 ounce troy
| = 12/175 pound |

(c) Chinese Units

- 1 picul (tam)
| = 100 catties |

- 1 catty (kan)
| = 0.60478982 kilogram |

- 1 tael (leung)
| = 1/16 catty |

- 1 mace (tsin)
| = 1/160 catty |

- 1 candareen (fan)
| = 1/1600 catty |

- 1 tael troy
| = 37.429 grams |

- 1 mace troy
| = 1/10 tael troy |

- 1 candareen troy
| = 1/10 mace troy |

(Amended L.N. 344 of 1988)

(Enacted 1987)

(Enacted 1987)