Convert Newtons to Slugs
Convert Newtons (N) to Slugs (slug) instantly and accurately.
Conversion Formula
slug = N × 0.006987275559
About Newtons
The newton (N) is the SI unit of force, but because weight is technically the gravitational force on a mass, newtons are the scientifically correct unit for what most people call 'weight.' At standard gravity (9.80665 m/s²), 1 kg of mass exerts a weight force of approximately 9.81 N. Scales in physics labs and engineering contexts display results in newtons rather than kilograms. The distinction matters in aerospace and high-altitude contexts: an astronaut's mass stays constant at, say, 70 kg, but their weight in newtons changes from ~686 N on Earth's surface to nearly 0 N in free-fall orbit.
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
| Newtons (N) | Slugs (slug) |
|---|---|
| 1 N | 0.00698728 slug |
| 2 N | 0.0139746 slug |
| 5 N | 0.0349364 slug |
| 10 N | 0.0698728 slug |
| 25 N | 0.174682 slug |
| 50 N | 0.349364 slug |
| 100 N | 0.698728 slug |