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One troy ounce (oz t) is equal to 31.103 476 8 grams. Also equal to 1.097 142 86 avoirdupois ounces, exactly 192⁄175, or about 10% larger.
Exagram or exagramme is equal to 1018 gram (unit of mass), comes from a combination of the metric prefix exa (E) with the gram (g). Plural name is exagrams.