Convert Micrograms to Avoirdupois Drams
Convert Micrograms (µg) to Avoirdupois Drams (dr av) instantly and accurately.
Conversion Formula
dr av = µg × 5.643833912e-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 Avoirdupois Drams
An avoirdupois dram (dr av) is 1/16 of an avoirdupois ounce - approximately 1.772 grams. Part of the avoirdupois system that governs everyday trade weights in the UK and US, it was historically used to measure small quantities of goods and spices in commerce. While rarely used in modern commerce (having been replaced by grams in most applications), the avoirdupois dram still appears in some spice and herbalist contexts, in US gunpowder loading data (where charges are specified in grains and drams), and in archaic recipe books.
Quick Reference Table
| Micrograms (µg) | Avoirdupois Drams (dr av) |
|---|---|
| 1 µg | 5.644 × 10-7 dr av |
| 2 µg | 1.129 × 10-6 dr av |
| 5 µg | 2.822 × 10-6 dr av |
| 10 µg | 5.644 × 10-6 dr av |
| 25 µg | 1.411 × 10-5 dr av |
| 50 µg | 2.822 × 10-5 dr av |
| 100 µg | 5.644 × 10-5 dr av |