Convert Troy Pounds to Grains
Convert Troy Pounds (lb t) to Grains (gr) instantly and accurately.
Conversion Formula
gr = lb t × 5760
About Troy Pounds
A troy pound (lb t) equals 12 troy ounces or 5,760 grains - approximately 373.24 grams. It is lighter than the common avoirdupois pound (453.59 g) because the troy system divides the pound into 12 ounces rather than 16. Historically used across Europe for trade in precious metals and pharmaceuticals, the troy pound was the legal standard in England from the 15th century until 1878. In the United States, the troy pound was once the official standard for coinage but was abolished for commercial use in 1828.
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 Pounds (lb t) | Grains (gr) |
|---|---|
| 1 lb t | 5760 gr |
| 2 lb t | 11520 gr |
| 5 lb t | 28800 gr |
| 10 lb t | 57600 gr |
| 25 lb t | 144000 gr |
| 50 lb t | 288000 gr |
| 100 lb t | 576000 gr |