Gold Price TrackerWhat Is a Troy Ounce?
Definition
A troy ounce (oz t) equals 31.1035 grams. Gold, silver, platinum, and palladium spot prices worldwide are quoted per troy ounce — not per avoirdupois (kitchen) ounce, which is about 28.35 grams.
Why it matters
Mixing up ounce types leads to ~10% valuation errors on bullion and jewelry. Our calculators support grams, kilograms, and troy ounces so you can convert accurately.
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Copper exception
Industrial copper on COMEX (HG=F) is priced per pound, not per troy ounce. See the copper price tracker for USD/lb quotes.