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C-19 [17] Thus one troy ounce = 480 grains × 0.064 798 91 grams/grain = 31.103 476 80 grams. Since the ounce avoirdupois is defined as 437.5 grains, a troy ounce is exactly 480 ⁄ 437.5 = 192 ⁄ 175 or about 1.09714 ounces avoirdupois or about 9.7% more. The troy ounce for trading precious metals is considered to be sufficiently approximated ...
Conversions between units in the metric system are defined by their prefixes (for example, 1 kilogram = 1000 grams, 1 milligram = 0.001 grams) and are thus not listed in this article. Exceptions are made if the unit is commonly known by another name (for example, 1 micron = 10 −6 metre).
Table of mass units Unit Relative value Metric value Notes grain (gr) 1 ⁄ 7000: ≈ 64.80 mg: 1 ⁄ 7000 lb dram (dr) 1 ⁄ 256: ≈ 1.772 g 1 ⁄ 16 oz ounce (oz) 1 ⁄ 16: ≈ 28.35 g 16 dr pound (lb) 1 ≈ 453.6 g 16 oz quarter (qr) 25 ≈ 11.34 kg 25 lb short hundredweight (cwt) 100 ≈ 45.36 kg 4 qr ton (t) or short ton 2000: ≈ 907.2 ...
The table below lists units supported by ... oz|ozt g gr}} → 1 ounce (0.91 ozt; ... sample of the default conversion for the unit
In Canada, a teaspoon is historically 1 ⁄ 6 imperial fluid ounce (4.74 mL) and a tablespoon is 1 ⁄ 2 imperial fl oz (14.21 mL). In both Britain and Canada, cooking utensils come in 5 mL for teaspoons and 15 mL for tablespoons, hence why it is labelled as that on the chart. The volume measures here are for comparison only.
C-19 [9] One gram is thus approximately equivalent to 15.432 36 grains. [6]: C-13 The unit formerly used by jewellers to measure pearls, diamonds, and other precious stones, called the jeweller's grain or pearl grain, is equal to 1 ⁄ 4 carat (50 mg; 0.77 gr). [5] The grain was also the name of a traditional French unit equal to 53.115 mg. [5]
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The gram (originally gramme; [1] SI unit symbol g) is a unit of mass in the International System of Units (SI) equal to one thousandth of a kilogram.. Originally defined as of 1795 as "the absolute weight of a volume of pure water equal to the cube of the hundredth part of a metre [1 cm 3], and at the temperature of melting ice", [2] the defining temperature (≈0 °C) was later changed to 4 ...