Separate weight from purity
A per-gram value is the same-currency troy-ounce reference divided by 31.1034768. The displayed value refers to fine metal. Multiplying it by gross weight without applying purity can overstate the contained metal value. Keep packaging, stones and other non-metal components separate from the holding’s net metal weight.
A worked valuation
The following figures are a worked example, not current prices. Illustrative USD/troy-ounce reference: 3,100. 10 grams × 0.995 = 9.95 grams of fine gold. Illustrative metal value: 991.6898 USD.
This value is neither a dealer’s ask nor your net resale proceeds. Enter actual bid and ask quotes in the same unit and add total fees separately. Quotes taken at different times can also differ from a calculated reference. When changing currency in the calculator, remember that FX is a daily reference.
Separate the product premium
Fabrication, minting, branding and packaging can add to a product’s price. Paying a premium does not establish that it will be recovered on resale. Compare fine content and total transaction cost rather than gross grams alone. Use the dealer ask when purchasing and the dealer bid when reselling.