 mg  i milligram

 carat  i carat (metric)
 Unit of mass used for diamonds and other precious stones. Jewelers everywhere now use a metric carat defined in 1907 to be exactly 200 milligrams.

 g  i gram

 kg  i kilogram
 Base unit of mass in the SI and MKS versions of the metric system.

 quintal  i quintal
 Metric unit of mass equal to 100 kilograms or approximately 220.4623 pounds.

 t  i ton (metric)

 u  i atomic unit mass

Unit of mass used by chemists and physicists for measuring the masses of atoms and molecules.
Careful experiments have measured the size of this unit;
the currently accepted value (1998) is 1.660 538 73 x 10^{24} grams.

 gr  i grain

The UK and USsytem of apothecaries weight units is based on the grain:
1 scruple = 20 grains
1 (apoth) drachm (UK) = 3 scruples
1 (ap) dram (US) = 3 scruples
1 apoth ounce (UK) = 8 drachms
1 ap ounce (US) = 8 drachms
[1 grain = (1/7000) lb]
For more info see pound

 dram  i dram
 Unit of weight in the traditional avoirdupois system equal to 1/16 ounce or 1/256 pound

 oz  i ounce

The UK and USsystem of avoirdupois weight units is based on the pound lb:
1 pound = 7000 grains 1 ounce = 16 drams 1 pound = 16 ounces 1 stone = 14 pounds 1 quarter = 2 stones 1 hundredweight (UK) = 4 quarters 1 ton (UK) = 20 hundredweights (UK) For more info see pound

 lb  i pound

In 1959 the national laboratory of Australia, Canada, Great Brittan, New Sealand, USA and South Africa
have decided to define the weight of the pound for precision measurements as:
1 lb = 0,453 59237 kg Before the
Uklb = 0,453 592 338 kg and the
Uslb = 0,453 592 427 7 kg
For more info see ounce

 stone  i stone
 Traditional British unit of weight. The stone was standardized at 14 pounds avoirdupois or approximately 6.350 29 kilograms. The stone equal exactly 1/2 quarter or 1/8 hundredweight.

 Quarter  i Quarter

 hundredweight US  i hundredweight US
 The U.S. hundredweight is equal to 100 pounds. British version is often called the long hundredweight and the American is called the short hundredweight or cental.

 Hundredweight UK  i Hundredweight UK
 Traditional unit of weight equal to 1/20 ton UK or 112 pounds avoirdupois, about 50.8023 kg

 Uston  i USton
 1 USton = 1 short (of nett) ton = 2000 lb
For more info see pound

 Ukton  i UKton
 1 UKton = 1 long (of gross) ton (US) = 2240 lb
For more info see pound
