how many grams makes an ounce
American ounce is 28.349 grams. Meaning 14.1745 grams rounded down at the thousandth place or 14.1746 to be exact. A troy ounce is different at 31.1035 grams per ounce ( this is the weight used for bullion currency ). So half a troy ounce is 15.55175 grams. On the street many people will say an ounce is 28 grams or 14 grams per half ounce, none of these are correct or incorrect. It depends on the circumstance or environment where the metrics are used.