Closer to the source.

01 / WEIGHTS & STANDARDS

The ounce is a troy ounce.

Precious metals use a troy ounce of exactly 31.1034768 grams. Fineness describes the proportion of precious metal in a product, commonly expressed in parts per thousand.

LBMA’s OTC guide gives minimum fineness of 995 for London Good Delivery gold bars and 999 for silver bars. These are wholesale standards; a small retail bar is not automatically a Good Delivery bar.

For platinum and palladium, consult the LPPM’s own Good Delivery standards and current refiner lists.

02 / ACCOUNT STRUCTURE

Read the ownership terms.

LBMA distinguishes between allocated accounts linked to identified bars and unallocated accounts that give a claim against a provider. The legal agreement determines the rights, access and charges of any particular arrangement.

03 / THE CALCULATOR

Every step is visible.

1. Convert gross weight to grams: kilograms × 1,000; troy ounces × 31.1034768.
2. Fine grams = gross grams × fineness ÷ 1,000.
3. Fine troy ounces = fine grams ÷ 31.1034768.
4. Metal value = fine troy ounces × your price per fine troy ounce.
5. Modeled total = metal value × (1 + premium ÷ 100) + one-off fee.
6. Effective cost per fine troy ounce = modeled total ÷ fine troy ounces.

The calculator uses unrounded values internally and rounds only the display. Its example price is illustrative. It excludes taxes, storage, insurance, foreign exchange and resale charges. Changing the currency label performs no FX conversion.