Convert Carats to Long Hundredweights
Convert Carats (ct) to Long Hundredweights (long cwt) instantly and accurately.
Conversion Formula
long cwt = ct × 3.936826110e-6
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 Long Hundredweights
A long hundredweight (long cwt) equals 112 pounds or approximately 50.802 kg - equal to 8 stone. The standard hundredweight in the United Kingdom and much of its historical trading sphere, it reflects the medieval English stone of 14 lb (8 × 14 = 112). British agricultural commodity prices, wool trade records, and livestock market reports historically used long hundredweights. The UK meat trade still occasionally references hundredweights in wholesale pricing.
Quick Reference Table
| Carats (ct) | Long Hundredweights (long cwt) |
|---|---|
| 1 ct | 3.937 × 10-6 long cwt |
| 2 ct | 7.874 × 10-6 long cwt |
| 5 ct | 1.968 × 10-5 long cwt |
| 10 ct | 3.937 × 10-5 long cwt |
| 25 ct | 9.842 × 10-5 long cwt |
| 50 ct | 0.000196841 long cwt |
| 100 ct | 0.000393683 long cwt |