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Poids et masse

Weight / Mass
Avoirdupois measure Standard measure
1 gross ton = 1 long ton = 2240 pounds 1 tonne = 1 metric ton
1 net ton = 1 short ton = 2000 pounds 1 tonne = 1000 kilograms
1 pound = 16 ounces = 7000 grains 1 kilograms = 1000 grams
1 ounce = 16 drachms = 437.5 grains 1 centigram = 10 milligrams
  1 decigram = 10 centigrams
1 long ton = 20 hundredweight 10 decigrams = 1 gram
1 hundredweight = 4 quarters = 112 pounds 10 grams = 1 dekagram
1 quarter = 2 stone = 28 pounds 10 dekagrams = 1 hectogram
1 quintal = 100 pounds 10 hectograms = 1 kilogram
 
Troy weight (measure of gold and silver) Apothecaries weight
 
1 pound = 12 ounces = 5760 grains 1 pound = 12 ounces = 5760 grains
1 ounce = 20 pennyweights = 480 grains 1 ounce = 8 drachms = 480 grains
1 pennyweight = 24 grains 1 drachm = 3 scruples = 60 grains
1 carat (diamond) = 3.086 grains 1 scruple = 20 grains
 
Conversion factors
 
1 long ton = 1.016 tonnes : 1 tonne = 0.9842 tons (long)
1 short ton = 0.9071 tonnes : 1 tonne = 1.1024 tons (short)
1 pound = 0.4536 kilograms : 1 kilogram = 2.2046 pounds (avoirdupois)
1 grain = 0.0648 grams : 1 gram = 15.432 grains
1 grain (avoidupois) = 1 grain (troy) = 1 grain (apothecaries)