Convert Ounce to Troy Ounce (oz to Troy Ounce)

Ounce (oz) and Troy Ounce (Troy Ounce) are both units of mass. With the conversion form below, you can effortlessly and accurately convert ounce to troy ounce. This free online calculator tool makes it simple and easy to perform the conversion from oz unit to the Troy Ounce unit.

Mass is the measure of the amount of matter in an object and its resistance to acceleration (inertia). The SI base unit is the kilogram (kg), now defined by fixing the Planck constant at h = 6.62607015 × 10⁻³⁴ J·s. Mass differs from weight: weight is the gravitational force acting on a mass (measured in newtons), while mass remains constant regardless of location. Common mass units include gram (g), milligram (mg), tonne (t = 1,000 kg), pound (lb), and ounce (oz).

An ounce (oz) is a unit of mass in the imperial measurement system, commonly used in the United States, United Kingdom, and other English-speaking countries. In jewelry, precious metals, and gemstones, the ounce serves as the standard for weight specification, pricing, and certification. One ounce equals approximately 28.35 grams. The ounce appears on jewelry certificates, international shipping documentation, and precious metals trading platforms. For anyone buying or selling jewelry internationally, understanding ounces is essential since most global markets and certification bodies reference ounce-based weights.

Troy ounce (symbol: oz t or ozt) is a unit of mass used primarily for weighing precious metals such as gold, silver, platinum, and palladium. One troy ounce is exactly equal to 31.1034768 grams, making it heavier than the avoirdupois ounce, which is commonly used for everyday goods. The troy ounce is the international standard for pricing and trading bullion, coins, and precious metals, and it is frequently converted to grams, kilograms, and avoirdupois ounces in global commodity markets and jewelry applications.