Convert Scruples to Slugs
Convert Scruples (s ap) to Slugs (slug) instantly and accurately.
Conversion Formula
slug = s ap × 8.880271478e-5
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 Slugs
A slug is a unit of mass in the British imperial and US customary foot-pound-second (FPS) engineering system, equal to the mass that accelerates at 1 foot per second squared under a force of 1 pound-force - approximately 14.594 kg. The slug was introduced to simplify dynamics calculations in engineering: using slugs ensures that F = ma holds without unit conversion factors when force is in pounds-force and acceleration in ft/s². Aerospace engineers and mechanical engineers working in US customary units use slugs for aircraft mass, structural dynamics, and ballistic calculations.
Quick Reference Table
| Scruples (s ap) | Slugs (slug) |
|---|---|
| 1 s ap | 8.88 × 10-5 slug |
| 2 s ap | 0.000177605 slug |
| 5 s ap | 0.000444014 slug |
| 10 s ap | 0.000888027 slug |
| 25 s ap | 0.00222007 slug |
| 50 s ap | 0.00444014 slug |
| 100 s ap | 0.00888027 slug |