Convert Pennyweights to Long Hundredweights
Convert Pennyweights (dwt) to Long Hundredweights (long cwt) instantly and accurately.
Conversion Formula
long cwt = dwt × 3.061224490e-5
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 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
| Pennyweights (dwt) | Long Hundredweights (long cwt) |
|---|---|
| 1 dwt | 3.061 × 10-5 long cwt |
| 2 dwt | 6.122 × 10-5 long cwt |
| 5 dwt | 0.000153061 long cwt |
| 10 dwt | 0.000306122 long cwt |
| 25 dwt | 0.000765306 long cwt |
| 50 dwt | 0.00153061 long cwt |
| 100 dwt | 0.00306122 long cwt |