How this site works
How we calculate
We do not collect dealers’ prices. Every figure is worked out from the world price, the same way, on every page.
world price per troy ounce÷grams in an ounce×dollar rate×purity×grams in the unit
- World priceSpot gold in US dollars from an aggregated feed 1, recalculated every 10 minutes while the market is open.
- RateThe ZAR rate from central-bank reference data 2. It is a market reference rate, not an official fixing of your central bank.
- Purity and weightFixed constants with their source: see the unit pages. 22k counts as 916 parts gold in 1000.
- WeekendsNo trading, no recalculation: the last price before the close stays, marked “market closed”.
- HistoryThe history and the chart use one series only: daily reference fixings, converted at the rate of the same day. We never join them to the live figure.
Why a jeweller’s price is different
Shops add a making charge and their margin, and buy back for less than they sell. Our figure is the metal alone: the floor of a fair price, not the shop price.
Sources
Every figure on this site points here by its number.
- 1Price feedWorld spot price of gold and silver, aggregated feedthe world price, every 10 minutes while the market is open
- 2Central banksFrankfurter — central-bank reference ratesUSD → ZAR, updated daily; also the daily history
- 3StandardUnits of weight and finenessgrams in an ounce and in a gram