Peso do ouro

A cotação internacional do preço do ouro tem por base o ouro de 24K e a onça troy. O preço do ouro que você lê no jornal reflete o preço de uma onça troy.

Pesos Troy
24 grains (gr)	= 1 pennyweight (dwt)	= 1,5552 gramas
20 pennyweights	= 1 ounce (oz.t)	= 31,1035 gramas
12 ounces (troy)(t.)	= 1 pound (lb t.)	= 373,2417 gramas
1 ounce (troy)(t.)	= 1,09714 ounces avoirdupois
1pound (troy)(t.)	= 0,82266 ounces avoirdupois

Para fazer a conversão:
pennyweights para gramas	»	pennyweights x 1,5552 = gramas
onças (t.) para gramas	»	ounces (t.) x 31,1035 = gramas
gramas para pennyweights	»	gramas x 0,6430 = pennyweights
gramas para onças (t.)	»	gramas x 0,0322 = ounces (t.)

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