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Instantly convert between gram, troy ounce, tola, kilogram, grain and all precious metal measurement units.
The base unit of the precious metals market is the troy ounce (31.1034768 g), distinct from the commercial avoirdupois ounce (28.3495 g). LBMA prices are published in USD per troy ounce, then converted to grams for the Swiss market. This 10% difference between the two ounces can mislead non-specialists.
Other common units in precious metallurgy: tola (11.6638 g, standard in Pakistan and India), don (3.75 g — China), baht (15.244 g — Thailand), and tael (37.799 g — Hong Kong). Swiss refineries work exclusively in grams and kilograms.
In retail jewellery, prices are quoted in CHF per gram. For LBMA Good Delivery bars, the standard unit is the troy ounce. Quickly converting between these units is an essential skill for any professional precious metals dealer or goldsmith in Switzerland.
Prices shown are indicative (LBMA mid-market). They do not constitute investment advice.