Convert Troy Ounces to Kilograms
Convert Troy Ounces (ozt) to Kilograms (kg) instantly and accurately.
Conversion Formula
kg = ozt × 0.0311034768
About Troy Ounces
The troy ounce (ozt or oz t) is the global standard for weighing and pricing precious metals - gold, silver, platinum, and palladium. Equal to 31.1034768 grams (about 10% heavier than the avoirdupois ounce), it originates from the medieval fair at Troyes, France, where a standardised weight system facilitated international trade. All gold spot prices quoted on financial markets (LBMA, COMEX, MCX) are priced per troy ounce. A standard 'Good Delivery' gold bar approved by the London Bullion Market Association weighs approximately 400 troy ounces (12.4 kg).
About Kilograms
The kilogram (kg) is the SI base unit of mass - the fundamental unit from which all other mass measurements in the metric system are derived. Since 2019 it has been defined by fixing the Planck constant h to exactly 6.62607015 × 10⁻³⁴ J·s, replacing the 130-year-old International Prototype Kilogram (a platinum-iridium cylinder kept in Sèvres, France). The kilogram governs daily life worldwide: body weight in most countries, grocery shopping, luggage allowances, postal rates, freight pricing, and ingredient quantities in cooking all reference kilograms.
Quick Reference Table
| Troy Ounces (ozt) | Kilograms (kg) |
|---|---|
| 1 ozt | 0.0311035 kg |
| 2 ozt | 0.062207 kg |
| 5 ozt | 0.155517 kg |
| 10 ozt | 0.311035 kg |
| 25 ozt | 0.777587 kg |
| 50 ozt | 1.55517 kg |
| 100 ozt | 3.11035 kg |