Convert Pennyweights to Grains
Convert Pennyweights (dwt) to Grains (gr) instantly and accurately.
Conversion Formula
gr = dwt × 24
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 Grains
A grain (gr) is the smallest unit in both the avoirdupois and troy weight systems, equal to exactly 64.79891 milligrams. Originally defined as the mass of a single grain of barley or wheat from the middle of an ear, it has been a standard of weight since ancient times. Today, grains are used to weigh gunpowder charges and bullets (a standard .308 rifle bullet weighs 168 gr), pharmaceutical preparations in apothecary compounding, and the fineness of gold alloys. Arrowhead and fishing hook weights are also specified in grains.
Quick Reference Table
| Pennyweights (dwt) | Grains (gr) |
|---|---|
| 1 dwt | 24 gr |
| 2 dwt | 48 gr |
| 5 dwt | 120 gr |
| 10 dwt | 240 gr |
| 25 dwt | 600 gr |
| 50 dwt | 1200 gr |
| 100 dwt | 2400 gr |