Troy Ounces to Grams Converter
Convert troy ounces to grams and back, instantly.
Use the correct ounce for precious metals
Gold, silver, platinum, and palladium are commonly quoted in troy ounces rather than everyday avoirdupois ounces. Because the two ounces have different masses, choosing the right unit matters. This converter uses the international troy-ounce definition and supports both metal weights in troy ounces and metric weights in grams.
The default 1 troy ounce converts to 31.1035 grams after six-significant-figure rounding. In reverse, 100 grams converts to 3.21507 troy ounces. The table provides quick whole-ounce comparisons and avoids the roughly ten-percent error that comes from substituting a standard household ounce.
Private weight conversion, not pricing
All arithmetic stays in your browser, which is useful for private holdings or draft inventory notes. No metal price is requested or fetched. The result converts gross mass only and does not determine purity, fine-metal content, assay results, premiums, taxes, or current market value.
Frequently Asked Questions
How many grams are in a troy ounce?
One international troy ounce equals exactly 31.1034768 grams.
Is a troy ounce heavier than a regular ounce?
Yes. A troy ounce is about 31.1035 grams, while an avoirdupois ounce is about 28.3495 grams.
Why are troy ounces used for metals?
The troy system is the established weight convention for precious metals such as gold, silver, platinum, and palladium.
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