Convert Troy Pounds to Carats
Convert Troy Pounds (lb t) to Carats (ct) instantly and accurately.
Conversion Formula
ct = lb t × 1866.208608
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 Carats
A metric carat (ct or CD) is exactly 200 milligrams (0.2 g), the universal standard for weighing gemstones. Established internationally in 1907, it replaced fractionally different regional carat weights previously used in different countries. The total weight of a diamond or colored gemstone is always expressed in carats: a 1.00 ct diamond of excellent cut and color can command over $5,000. The Cullinan diamond, the largest gem-quality rough diamond ever found, weighed 3,106.75 carats.
Quick Reference Table
| Troy Pounds (lb t) | Carats (ct) |
|---|---|
| 1 lb t | 1866.21 ct |
| 2 lb t | 3732.42 ct |
| 5 lb t | 9331.04 ct |
| 10 lb t | 18662.1 ct |
| 25 lb t | 46655.2 ct |
| 50 lb t | 93310.4 ct |
| 100 lb t | 186621 ct |