Convert Pennyweights to Micrograms
Convert Pennyweights (dwt) to Micrograms (µg) instantly and accurately.
Conversion Formula
µg = dwt × 1555173.84
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 Micrograms
A microgram (µg or mcg) is one millionth of a gram (10⁻⁶ g). It is the standard dosing unit for potent medications and micronutrients: vitamin B12 recommended daily intake is 2.4 µg, folic acid supplements are 400 µg, and levothyroxine (thyroid medication) doses are typically 25-200 µg. Air quality standards measure fine particulate matter (PM2.5) in micrograms per cubic meter - the WHO guideline is 15 µg/m³ annual mean. A grain of sand weighs about 50-100 micrograms, and a single snowflake approximately 3 micrograms.
Quick Reference Table
| Pennyweights (dwt) | Micrograms (µg) |
|---|---|
| 1 dwt | 1555170 µg |
| 2 dwt | 3110350 µg |
| 5 dwt | 7775870 µg |
| 10 dwt | 15551700 µg |
| 25 dwt | 38879300 µg |
| 50 dwt | 77758700 µg |
| 100 dwt | 155517000 µg |