Convert Stones to Slugs
Convert Stones (st) to Slugs (slug) instantly and accurately.
Conversion Formula
slug = st × 0.4351333024
About Stones
A stone (st) equals 14 pounds or approximately 6.350 kg. It is the standard unit for expressing human body weight in the United Kingdom and Ireland, where a person will say they weigh '11 stone 4' (meaning 11 stone and 4 pounds, or 158 lb / 71.7 kg). Despite the UK's official adoption of the metric system, stones remain the dominant unit for personal body weight on British bathroom scales, in doctors' offices, and in everyday conversation. British newspapers and sports reports routinely describe athletes' weights in stones and pounds.
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
| Stones (st) | Slugs (slug) |
|---|---|
| 1 st | 0.435133 slug |
| 2 st | 0.870267 slug |
| 5 st | 2.17567 slug |
| 10 st | 4.35133 slug |
| 25 st | 10.8783 slug |
| 50 st | 21.7567 slug |
| 100 st | 43.5133 slug |