How this calculator works
The calculator starts from the live 24K gold price per troy ounce, converted to CNY at the current exchange rate. Your weight is converted to grams (1 troy ounce = 31.1034768 g, 1 tola = 11.6638038 g), and the value is adjusted for purity — the multiplier is simply the karat divided by 24, so 22K/916 gold uses 22 ÷ 24 ≈ 0.9167. The formula: value = grams × pure gram price × purity, plus any premium and minus any discount you enter.
In China, most gold jewellery is sold as 足金 (zú jīn, "full gold"), which is 999 fine — effectively 24K — rather than the 22K/916 standard common in Southeast Asia. Retailers quote a daily gold price in yuan per gram plus a per-gram workmanship fee.