Ounces (Troy) to Grams Converter
Ounces (Troy) to Grams Converter
The troy ounce is the standard unit for pricing and weighing precious metals worldwide — gold, silver, platinum, and palladium are quoted "per troy ounce," not the everyday avoirdupois ounce.
This tool goes beyond troy ounces and grams: the "From" and "To" dropdowns also cover pennyweight and troy grain (both part of the same historical system), plus the full range of other mass units.
- Conversion factor: 1 troy ounce = exactly 31.1034768 grams (480 grains).
- Fully flexible: change either dropdown to convert between any two of the 25+ supported mass units.
- Not the same as a regular ounce: a troy ounce (31.10 g) is about 10% heavier than an avoirdupois ounce (28.35 g) — precious metal prices always use the troy ounce specifically.
How many grams are in a troy ounce?
1 troy ounce equals exactly 31.1034768 grams. To convert, multiply the troy ounce value by 31.1034768.
Why do gold and silver use troy ounces instead of regular ounces?
The troy weight system has been the traditional standard for precious metals and gemstones for centuries, predating and remaining separate from the everyday avoirdupois system used for most other goods.
Ounces (Troy) to Grams Converter
The troy ounce is the standard unit for pricing and weighing precious metals worldwide — gold, silver, platinum, and palladium are quoted "per troy ounce," not the everyday avoirdupois ounce.
This tool goes beyond troy ounces and grams: the "From" and "To" dropdowns also cover pennyweight and troy grain (both part of the same historical system), plus the full range of other mass units.
- Conversion factor: 1 troy ounce = exactly 31.1034768 grams (480 grains).
- Fully flexible: change either dropdown to convert between any two of the 25+ supported mass units.
- Not the same as a regular ounce: a troy ounce (31.10 g) is about 10% heavier than an avoirdupois ounce (28.35 g) — precious metal prices always use the troy ounce specifically.
How many grams are in a troy ounce?
1 troy ounce equals exactly 31.1034768 grams. To convert, multiply the troy ounce value by 31.1034768.
Why do gold and silver use troy ounces instead of regular ounces?
The troy weight system has been the traditional standard for precious metals and gemstones for centuries, predating and remaining separate from the everyday avoirdupois system used for most other goods.