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A pennyweight (dwt) is a unit of mass equal to 24 grains, 1 ⁄ 20 of a troy ounce, 1 ⁄ 240 of a troy pound, approximately 0.054857 avoirdupois ounce [1] and exactly 1.55517384 grams. [2] It is abbreviated dwt, d standing for denarius – (an ancient Roman coin), and later used as the symbol of an old British penny (see £sd).
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).
Avoirdupois (/ ˌ æ v ər d ə ˈ p ɔɪ z, ˌ æ v w ɑːr dj uː ˈ p w ɑː /; [1] abbreviated avdp.) [2] is a measurement system of weights that uses pounds and ounces as units. [ 3 ] [ 4 ] It was first commonly used in the 13th century AD and was updated in 1959.
The Taiwanese still followed their own habits and continued to use the old weights and measures of the Qing Dynasty. 1 Taiwan fen is equal to 0.375 grams (375 mg), or 1/10 Taiwan qian. [ 10 ] Table of units of mass in Taiwan
1/4 imp gal or 40 imp fl oz 1.0 imp qt (1,100 ml; 38 US fl oz) imperial pint: imppt imp pt 1/8 imp gal or 20 imp fl oz 1.0 imp pt (0.57 L) imperial fluid ounce: impoz (impfloz) imp fl oz 1/160 imp gal 1.0 imp fl oz (28 ml; 0.96 US fl oz) impoz USoz; impoz U.S.oz; impoz ml; impoz mL; US customary liquid measure: US barrel: USbbl US bbl
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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 ...