Kilograms to Slugs Converter
Convert mass between kilograms (kg) and slugs (slug) instantly. The slug is the Imperial unit of mass in the foot-pound-second system, commonly used in physics and engineering. 1 slug = 14.5939 kg.
What Is a Slug?
The slug is a unit of mass in the Imperial (foot-pound-second) system. It is defined as the mass that accelerates by 1 ft/s² when a force of 1 pound-force (lbf) is applied to it. One slug is equal to approximately 14.5939 kilograms or 32.174 pounds-mass.
The slug is primarily used in physics and engineering in the United States, particularly in dynamics problems where forces are expressed in pounds-force and accelerations in feet per second squared. Unlike the pound-mass (lbm), which is a unit of mass in the avoirdupois system, the slug is defined directly from Newton's Second Law: F = m × a, where F is in pound-force (lbf), m is in slugs, and a is in ft/s².
How Does the Kilograms to Slugs Converter Work?
The converter uses the exact conversion factors:
1 kg = 0.0685218 slugs
1 slug = 14.5939 kg
For conversion:
slugs = kg × 0.0685218
kg = slugs × 14.5939
The relationship between slug and pound-mass: 1 slug = 32.174 lbm
Simply enter a value in either unit, select the direction of conversion, and the calculator will instantly compute the equivalent mass. The results can be displayed in scientific notation for very small or large numbers.
Why Use This Kilograms to Slugs Converter?
- Two-Way Conversion: Convert from kg to slugs and from slugs to kg.
- Precise Results: Uses the exact conversion factor (14.5939 kg per slug).
- Additional Equivalents: Shows mass in pounds and weight in pound-force.
- Reference Table: Quick reference for common mass conversions.
- Free & Private: No registration, no data storage.
Common Mass Equivalents
- 1 kg = 0.0685218 slug = 2.20462 lb = 2.20462 lbf at 1g
- 1 slug = 14.5939 kg = 32.174 lb = 32.174 lbf at 1g
- 1 lb (mass) = 0.453592 kg = 0.031081 slug
- 1 lbf = 4.44822 N (force)
- 1 N = 0.224809 lbf
❓ Kilograms to Slugs Converter FAQ
What is a slug?
A slug is a unit of mass in the Imperial (foot-pound-second) system. It is defined as the mass that accelerates by 1 ft/s² when a force of 1 pound-force is applied. One slug equals approximately 14.5939 kg.
How many kilograms are in a slug?
There are exactly 14.5939 kilograms in one slug. The slug is a larger unit of mass than the kilogram.
How many slugs are in a kilogram?
There are approximately 0.0685218 slugs in one kilogram.
What is the difference between a slug and a pound-mass?
A slug is a unit of mass in the FPS (foot-pound-second) system. A pound-mass (lbm) is a unit of mass in the avoirdupois system. One slug equals 32.174 lbm. The slug is defined from Newton's Second Law, while the pound-mass is defined by the international pound standard.
What is the difference between mass and weight?
Mass is the amount of matter in an object, measured in kilograms or slugs. Weight is the force exerted by gravity on that mass. On Earth, 1 kg weighs about 9.81 N (2.2046 lbf), and 1 slug weighs 32.174 lbf at standard gravity.
Why is the slug used in physics and engineering?
The slug is used in the Imperial system for dynamics calculations because it simplifies Newton's Second Law: F = m × a. When mass is in slugs, force is in pound-force (lbf), and acceleration is in ft/s², the equation has no conversion factors.
How do I convert kilograms to slugs?
Multiply the number of kilograms by 0.0685218. For example: 10 kg × 0.0685218 = 0.685218 slugs. This calculator does the conversion for you automatically.
How do I convert slugs to kilograms?
Multiply the number of slugs by 14.5939. For example: 1 slug × 14.5939 = 14.5939 kg. This calculator does the conversion for you automatically.
What is the relationship between slug and Newton?
A slug is a unit of mass, while a Newton is a unit of force. On Earth, 1 slug weighs approximately 143.117 N (since 1 slug = 32.174 lbm, and 1 lbm = 4.44822 N).
What is the acceleration due to gravity in ft/s²?
The standard acceleration due to gravity is 32.174 ft/s². This is why 1 slug weighs 32.174 lbf.
Can I use this calculator for engineering calculations?
Yes. This calculator uses the exact conversion factors (14.5939 kg per slug) and is suitable for engineering, physics, and academic applications. Always verify results with professional tools for critical applications.
What is the difference between slug and the metric slug (hyl)?
The metric slug, also called the hyl, is a unit of mass in the metric system used in some European countries. It is defined as the mass that accelerates by 1 m/s² when a force of 1 kgf is applied. It is not the same as the Imperial slug.
Is the slug still commonly used?
The slug is still used in the United States in engineering, physics, and aerospace applications, particularly in dynamics and structural mechanics. However, the SI system (kilograms) is more common globally.
How do I convert slugs to pounds-mass?
Multiply the number of slugs by 32.174. For example: 1 slug × 32.174 = 32.174 lbm.
How do I convert pounds-mass to slugs?
Divide the number of pounds-mass by 32.174. For example: 32.174 lbm ÷ 32.174 = 1 slug.
What is the origin of the term "slug"?
The term "slug" was coined in the early 20th century. It refers to the fact that a mass of 1 slug accelerates sluggishly (slowly) when a force is applied, compared to a smaller mass.
Is this calculator accurate for scientific applications?
Yes. The conversion factor (14.5939 kg per slug) is exact to 4 decimal places, making this calculator suitable for most scientific and engineering applications.