|Metric Tons (or Tonnes) conversion
||A unit of weight equal to 1,000 kilograms, or 2,204.6 pounds.
||One kilogram is equivalent to 1,000 grams or 2.2 pounds; the mass of a liter of water.
||A metric unit of weight equal to one thousandth of a kilogram
||Abbreviated "ct." and spelled with a "c" is a measure of weight used for gemstones. One carat is equal to 1/5 of a gram (200 milligrams). Stones are measured to the nearest hundredth of a carat. A hundreth of a carat is also called a point. Thus a .10 carat stone can be called either 10 points, or 1/10 of a carat. Small stones like .05, and .10ct are most often referred to by point designations. Note that karat with a "K" is a measure of the purity of a gold alloy. A one carat round diamond of average proportions is approximately 6.5mm in diameter. Note that this relationship of weight and size is different for each family of stones. For example ruby and sapphire are both heavier than diamond (technically, they have a higher specific gravity, so a 1 carat ruby or sapphire is smaller in size than a on carat diamond. See Weights and Measures of Gold, Silver and Precious Gems for more information.
||A unit of mass equal to one-thousandth of a gram.
||A unit of mass equal to one-millionth of a gram.
|Long Tons (UK) conversion
||A long ton is a British measurement and equivilent to 2,240 pounds. Not to be confused with the US "short ton"
|Short Tons (US) conversion
||United States measurement also known as a short ton that equals 2,000 pounds
|Short Hundredweights (US) conversion
||This US measurement is equivelent to one hundred pounds
|Long Hundredweights (UK) conversion
||Before approximately the 14th century there were two hundredweights in England, one of 100 pounds, and one of 108 pounds. In 1340, King Edward III changed the value of the stone from 12? pounds to 14 pounds. Since a hundredweight is 8 stones, the 100-pound hundredweight became 112 pounds.
||A British measurement of mass that equals fourteen pounds
||A unit of mass equal to 16 ounces
|Troy Pounds conversion
||An apothecary weight equal to 12 ounces or 373.242 grams
|Troy Ounces conversion
||A unit of apothecary weight equal to 480 grains or one twelfth of a troy pound
||A unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams
||A measure of Troy weight equalling 24 grains or the twentieth part of a Troy ounce (there are 12 ounces in a pound Troy). Pennyweight is usually abbreviated dwt.
||1/7000 pound; equals a troy grain or 64.799 milligrams