Convert Scruples to Nanograms
Convert Scruples (s ap) to Nanograms (ng) instantly and accurately.
Conversion Formula
ng = s ap × 1295978200
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.
About Nanograms
A nanogram (ng) is one billionth of a gram (10⁻⁹ g). This is the standard mass unit in analytical chemistry, pharmacology, and toxicology for detecting trace substances. Blood plasma concentrations of hormones, drugs, and environmental contaminants are routinely reported in nanograms per milliliter (ng/mL). A typical therapeutic blood level for many medications is in the range of 10-500 ng/mL. In forensic science, nanogram-level DNA quantities can be amplified by PCR to yield a full genetic profile.
Quick Reference Table
| Scruples (s ap) | Nanograms (ng) |
|---|---|
| 1 s ap | 1.296 × 109 ng |
| 2 s ap | 2.592 × 109 ng |
| 5 s ap | 6.48 × 109 ng |
| 10 s ap | 1.296 × 1010 ng |
| 25 s ap | 3.24 × 1010 ng |
| 50 s ap | 6.48 × 1010 ng |
| 100 s ap | 1.296 × 1011 ng |