Convert Carats to Troy Pounds
Convert Carats (ct) to Troy Pounds (lb t) instantly and accurately.
Conversion Formula
lb t = ct × 0.0005358457761
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.
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.
Quick Reference Table
| Carats (ct) | Troy Pounds (lb t) |
|---|---|
| 1 ct | 0.000535846 lb t |
| 2 ct | 0.00107169 lb t |
| 5 ct | 0.00267923 lb t |
| 10 ct | 0.00535846 lb t |
| 25 ct | 0.0133961 lb t |
| 50 ct | 0.0267923 lb t |
| 100 ct | 0.0535846 lb t |