Convert Troy Ounces to Milligrams
Convert Troy Ounces (ozt) to Milligrams (mg) instantly and accurately.
Conversion Formula
mg = ozt × 31103.4768
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 Milligrams
A milligram (mg) is one thousandth of a gram (10⁻³ g). It is the primary unit for pharmaceutical dosing: aspirin tablets are typically 500 mg, ibuprofen 200-400 mg, and melatonin supplements 0.5-10 mg. Precious metal assay results and alloy compositions are specified in milligrams per kilogram (mg/kg = ppm). Nutritional labels worldwide list mineral content in milligrams - the recommended daily intake of iron is 8-18 mg, calcium 1000 mg, and sodium under 2300 mg. A grain of rice weighs about 25-30 mg, and a medium eyelash approximately 0.1 mg.
Quick Reference Table
| Troy Ounces (ozt) | Milligrams (mg) |
|---|---|
| 1 ozt | 31103.5 mg |
| 2 ozt | 62207 mg |
| 5 ozt | 155517 mg |
| 10 ozt | 311035 mg |
| 25 ozt | 777587 mg |
| 50 ozt | 1555170 mg |
| 100 ozt | 3110350 mg |