Convert Slugs to Grains
Convert Slugs (slug) to Grains (gr) instantly and accurately.
Conversion Formula
gr = slug × 225218.3399
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.
About Grains
A grain (gr) is the smallest unit in both the avoirdupois and troy weight systems, equal to exactly 64.79891 milligrams. Originally defined as the mass of a single grain of barley or wheat from the middle of an ear, it has been a standard of weight since ancient times. Today, grains are used to weigh gunpowder charges and bullets (a standard .308 rifle bullet weighs 168 gr), pharmaceutical preparations in apothecary compounding, and the fineness of gold alloys. Arrowhead and fishing hook weights are also specified in grains.
Quick Reference Table
| Slugs (slug) | Grains (gr) |
|---|---|
| 1 slug | 225218 gr |
| 2 slug | 450437 gr |
| 5 slug | 1126090 gr |
| 10 slug | 2252180 gr |
| 25 slug | 5630460 gr |
| 50 slug | 11260900 gr |
| 100 slug | 22521800 gr |