Convert Pennyweights to Carats
Convert Pennyweights (dwt) to Carats (ct) instantly and accurately.
Conversion Formula
ct = dwt × 7.7758692
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.
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
| Pennyweights (dwt) | Carats (ct) |
|---|---|
| 1 dwt | 7.77587 ct |
| 2 dwt | 15.5517 ct |
| 5 dwt | 38.8793 ct |
| 10 dwt | 77.7587 ct |
| 25 dwt | 194.397 ct |
| 50 dwt | 388.793 ct |
| 100 dwt | 777.587 ct |