Convert Pennyweights to Long Tons
Convert Pennyweights (dwt) to Long Tons (L/T) instantly and accurately.
Conversion Formula
L/T = dwt × 1.530612245e-6
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 Tons
A long ton (UK ton, displacement ton) equals 2,240 pounds or exactly 1,016.0469088 kg. The standard ton in the United Kingdom and Commonwealth countries, it equals 20 long hundredweights of 112 lb each. Naval architecture and ship displacement are specified in long tons: the displacement of a warship or cargo vessel is the weight of water it displaces, expressed in long tons. The Titanic had a displacement of approximately 52,310 long tons. British agricultural, mining, and coal trade statistics from the 18th through mid-20th centuries used long tons exclusively.
Quick Reference Table
| Pennyweights (dwt) | Long Tons (L/T) |
|---|---|
| 1 dwt | 1.531 × 10-6 L/T |
| 2 dwt | 3.061 × 10-6 L/T |
| 5 dwt | 7.653 × 10-6 L/T |
| 10 dwt | 1.531 × 10-5 L/T |
| 25 dwt | 3.827 × 10-5 L/T |
| 50 dwt | 7.653 × 10-5 L/T |
| 100 dwt | 0.000153061 L/T |