Convert Milligrams to Pennyweights
Convert Milligrams (mg) to Pennyweights (dwt) instantly and accurately.
Conversion Formula
dwt = mg × 0.0006430149314
About Milligrams
A milligram (mg) is one thousandth of a gram (10⁻³ g). It is the primary unit for pharmaceutical dosing: aspirin tablets are typically 500 mg, ibuprofen 200-400 mg, and melatonin supplements 0.5-10 mg. Precious metal assay results and alloy compositions are specified in milligrams per kilogram (mg/kg = ppm). Nutritional labels worldwide list mineral content in milligrams - the recommended daily intake of iron is 8-18 mg, calcium 1000 mg, and sodium under 2300 mg. A grain of rice weighs about 25-30 mg, and a medium eyelash approximately 0.1 mg.
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
| Milligrams (mg) | Pennyweights (dwt) |
|---|---|
| 1 mg | 0.000643015 dwt |
| 2 mg | 0.00128603 dwt |
| 5 mg | 0.00321507 dwt |
| 10 mg | 0.00643015 dwt |
| 25 mg | 0.0160754 dwt |
| 50 mg | 0.0321507 dwt |
| 100 mg | 0.0643015 dwt |