One gold troy ounce equals 31.1034768 grams. This calculator will provide you with the approximate value of scrap gold you may have based on the current price of gold. To use the calculator you will need to weigh your gold in grams and you will need to know the karat value of your gold. Gold prices change constantly, as often as every second of the day. For this reason, the data in this calculator should be used for informational or reference purposes only.