Gold gram calculator: grams, kilos and ounces
Convert a gold weight between grams, kilograms and troy ounces, then see its value at the current spot price. Everything is calculated in your browser.
Weight & price
Result
This is the value of the gold content at spot, the wholesale price for pure gold. Dealers, jewellers and pawn shops buy below spot and sell above it, and jewellery prices add making charges and taxes.
How the gold weight and value maths works
1 troy ounce = 31.1034768 grams, and 1 kilogram = 32.1507 troy ounces. Gold is always priced in troy ounces, not the 28.35 g ounce used for food.
Value = weight in troy ounces × purity × spot price. Example: 10 g of 18k gold at $4,000 per ounce is 10 ÷ 31.1035 × 0.75 × 4,000 = $964.52.
The spot price comes from gold-api.com and can be delayed. Currency conversion uses the European Central Bank's daily reference rates via Frankfurter, which are not live. You can type over either figure. See today's range on the gold price page.
For information and education only. Not an offer, a valuation for sale, advice or a signal to trade.