Convert Grains to Troy Ounces
Convert Grains (gr) to Troy Ounces (ozt) instantly and accurately.
Conversion Formula
ozt = gr × 0.002083333333
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.
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).
Quick Reference Table
| Grains (gr) | Troy Ounces (ozt) |
|---|---|
| 1 gr | 0.00208333 ozt |
| 2 gr | 0.00416667 ozt |
| 5 gr | 0.0104167 ozt |
| 10 gr | 0.0208333 ozt |
| 25 gr | 0.0520833 ozt |
| 50 gr | 0.104167 ozt |
| 100 gr | 0.208333 ozt |