Although 1 oz = 28.3495 gram for all conversions, in case of Gold and Silver, 1 oz means 1 Troy Ounce, not the common Ounce,
1 troy ounce = 31.1034768 grams
Thus, Troy Ounce is heavier than common ounce by about 9.71%.
Although the definition does not make any difference to trading, this explanation is given for those who want to convert the international price(per Ounce) of gold or silver to our common unit in India, the Tola (10g) or the metric unit gram.
-Anant
1 troy ounce = 31.1034768 grams
Thus, Troy Ounce is heavier than common ounce by about 9.71%.
Although the definition does not make any difference to trading, this explanation is given for those who want to convert the international price(per Ounce) of gold or silver to our common unit in India, the Tola (10g) or the metric unit gram.
-Anant