Convert Troy Ounces to Grains
Convert Troy Ounces (ozt) to Grains (gr) instantly and accurately.
Conversion Formula
gr = ozt × 480
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 Grains
A grain (gr) is the smallest unit in both the avoirdupois and troy weight systems, equal to exactly 64.79891 milligrams. Originally defined as the mass of a single grain of barley or wheat from the middle of an ear, it has been a standard of weight since ancient times. Today, grains are used to weigh gunpowder charges and bullets (a standard .308 rifle bullet weighs 168 gr), pharmaceutical preparations in apothecary compounding, and the fineness of gold alloys. Arrowhead and fishing hook weights are also specified in grains.
Quick Reference Table
| Troy Ounces (ozt) | Grains (gr) |
|---|---|
| 1 ozt | 480 gr |
| 2 ozt | 960 gr |
| 5 ozt | 2400 gr |
| 10 ozt | 4800 gr |
| 25 ozt | 12000 gr |
| 50 ozt | 24000 gr |
| 100 ozt | 48000 gr |