• Jan 1, 2026 13g Gold Price Let's use 22 karat gold as an example. 3. Calculate the gold content: Convert the karat to a decimal: 22 karat gold is 22/24 = 0.9167 pure gold. 4. Calculate the price per gram: Divide the spot price by the weight of a troy ounce (31.1 grams) to get the price per gram of pure gold: By Janessa Mertz
