Convert Carats to Pennyweights
Convert Carats (ct) to Pennyweights (dwt) instantly and accurately.
Conversion Formula
dwt = ct × 0.1286029863
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 Pennyweights
A pennyweight (dwt or pwt) equals 24 grains or 1/20 of a troy ounce - approximately 1.555 grams. Its name derives from the weight of an English silver penny in the medieval period. Pennyweights are the standard unit used by jewellers and goldsmiths in North America for weighing precious metals: gold, silver, and platinum. When a jeweller quotes the gold weight of a ring or chain, they typically use pennyweights. Gold buyers, refiners, and scrap metal dealers quote prices per pennyweight (often abbreviated 'DWT') when appraising jewellery.
Quick Reference Table
| Carats (ct) | Pennyweights (dwt) |
|---|---|
| 1 ct | 0.128603 dwt |
| 2 ct | 0.257206 dwt |
| 5 ct | 0.643015 dwt |
| 10 ct | 1.28603 dwt |
| 25 ct | 3.21507 dwt |
| 50 ct | 6.43015 dwt |
| 100 ct | 12.8603 dwt |