How to convert ounces to grams
One ounce weighs 31.1035 grams and one gram weighs 1 grams, so 1 ounce = 31.1035 grams. Multiply any amount in ounces by 31.1035 to get grams, or divide by 31.1035 to go back.
Example
10 ounces × 31.1035 = 311.0348 grams. At today's price, that weight of pure gold is worth $41,405.
Why units matter for precious metals
Bullion is priced in troy ounces, jewelry in grams, South Asian markets in tolas and Chinese markets in taels. Mixing up the avoirdupois ounce (28.35 g) and troy ounce (31.10 g) is a common 9.7% error when comparing prices.
- Ask sellers which ounce they mean.
- Convert everything to grams before comparing offers.
- Use the exact factors on this page rather than rounded ones for large amounts.
Live values use MetalflowAPI prices.