Convert Micrograms to Scruples
Convert Micrograms (µg) to Scruples (s ap) instantly and accurately.
Conversion Formula
s ap = µg × 7.716179176e-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 Scruples
A scruple (s ap) is a unit of the apothecary weight system equal to 20 grains or approximately 1.296 grams. Derived from the Latin 'scrupulus' (a small sharp stone used as a counterweight), it was the basic dispensing unit in pre-metric pharmacy across Europe. The apothecary system divided the fluid ounce into 8 drams, each dram into 3 scruples, and each scruple into 20 grains - a hierarchy memorised by every 19th-century pharmacist.
Quick Reference Table
| Micrograms (µg) | Scruples (s ap) |
|---|---|
| 1 µg | 7.716 × 10-7 s ap |
| 2 µg | 1.543 × 10-6 s ap |
| 5 µg | 3.858 × 10-6 s ap |
| 10 µg | 7.716 × 10-6 s ap |
| 25 µg | 1.929 × 10-5 s ap |
| 50 µg | 3.858 × 10-5 s ap |
| 100 µg | 7.716 × 10-5 s ap |