Gold Purity Calculator

The Gold Purity Calculator determines the actual pure gold content in a piece of jewelry or bullion based on its karat rating or fineness. 24K gold is 99.9% pure, 22K is 91.6%, 18K is 75%, and 14K is 58.3%, with the remainder being alloy metals like copper, silver, or zinc. Enter the total weight and the karat or fineness value to see the pure gold weight and alloy weight. The donut chart visually represents the proportion of pure gold versus alloy in the piece. Understanding gold purity is essential when buying or selling jewelry. The price should be based on the pure gold content, not the total weight. This calculator helps you verify that the price you are paying or receiving is fair relative to the current spot price of pure gold.