Convert Micrograms to Pennyweights
Convert Micrograms (µg) to Pennyweights (dwt) instantly and accurately.
Conversion Formula
dwt = µg × 6.430149314e-7
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.
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
| Micrograms (µg) | Pennyweights (dwt) |
|---|---|
| 1 µg | 6.43 × 10-7 dwt |
| 2 µg | 1.286 × 10-6 dwt |
| 5 µg | 3.215 × 10-6 dwt |
| 10 µg | 6.43 × 10-6 dwt |
| 25 µg | 1.608 × 10-5 dwt |
| 50 µg | 3.215 × 10-5 dwt |
| 100 µg | 6.43 × 10-5 dwt |