1 slug is equal to approximately 14.5939 kilograms.
A slug is a unit of mass used primarily in the imperial system, mostly in the US customary system, and converting it to kilograms allows for easier use in metric-based calculations and sciences. This conversion is done by multiplying the slug value by the exact factor that relates slugs to kilograms.
Conversion Tool
Result in kg:
Conversion Formula
The formula to convert slugs to kilograms is:
kilograms = slugs × 14.5939
This works because one slug is defined as the mass that accelerates by 1 foot per second squared when a force of one pound-force is exerted on it. Since 1 slug equals 14.5939 kilograms, multiplying the slug value by this factor converts it to kg.
Example calculation for 1 slug:
- Start with: 1 slug
- Multiply by the conversion factor: 1 × 14.5939 = 14.5939 kg
Conversion Example
- 3.5 slugs to kg:
- Take the slug value: 3.5
- Multiply by 14.5939: 3.5 × 14.5939 = 51.0787 kg
- Result is approximately 51.0787 kilograms
- 0.75 slugs to kg:
- Slug value: 0.75
- Multiply: 0.75 × 14.5939 = 10.9454 kg
- Result: 10.9454 kilograms
- 10 slugs to kg:
- Slug value: 10
- Multiply: 10 × 14.5939 = 145.939 kg
- Result: 145.939 kilograms
- 5.25 slugs to kg:
- Slug value: 5.25
- Multiply: 5.25 × 14.5939 = 76.5805 kg
- Result: 76.5805 kilograms
Conversion Chart
| Slug | Kg |
|---|---|
| -24.0 | -350.2536 |
| -20.0 | -291.8780 |
| -15.0 | -218.9085 |
| -10.0 | -145.9390 |
| -5.0 | -72.9695 |
| 0.0 | 0.0000 |
| 5.0 | 72.9695 |
| 10.0 | 145.9390 |
| 15.0 | 218.9085 |
| 20.0 | 291.8780 |
| 25.0 | 364.8475 |
| 26.0 | 379.4414 |
This chart helps by showing quick conversions for slug values within the range -24 to 26. To use, find the slug value in the first column, then read across to find its equivalent in kilograms.
Related Conversion Questions
- How many kilograms does 1 slug equal exactly?
- What is the weight of 1 slug in kilograms for physics calculations?
- Can you convert 1 slug mass to kilograms easily?
- Is 1 slug heavier or lighter than 1 kilogram?
- How to convert 1 slug into kg for engineering use?
- What does 1 slug convert to in kilograms on the metric system?
- How many kg correspond to 1 slug unit of mass?
Conversion Definitions
Slug: The slug is a unit of mass in the imperial system used mainly in the United States. It represents the mass that accelerates by 1 foot per second squared when a force of 1 pound-force is applied. One slug equals roughly 14.5939 kilograms.
Kilogram (kg): The kilogram is the base unit of mass in the International System of Units (SI). It is defined by the Planck constant, and it measures the amount of matter in an object. One kilogram is equal to 1000 grams.
Conversion FAQs
Why is the slug unit used instead of kilograms in some cases?
The slug is used mostly in the US customary and imperial systems, particularly in engineering and physics where pounds-force and feet per second squared are common. It simplifies calculations involving force and mass in these units. Kilograms are more common worldwide in SI units.
Can the slug be converted to other metric units besides kilograms?
Yes, the slug can be converted to grams, milligrams, or metric tons by first converting it to kilograms and then applying the appropriate metric scale. For example, 1 slug equals 14,593.9 grams or 0.0145939 metric tons.
Does the conversion factor between slug and kilogram ever change?
No, the conversion factor is constant because it depends on fixed definitions of the pound-force and the foot. These are standardized, so 1 slug will always equal approximately 14.5939 kilograms regardless of context.
What is the difference between slug and pound-mass?
Slug and pound-mass are both units of mass in imperial systems but differ in magnitude. One slug equals about 32.174 pounds-mass. The slug is linked directly to force and acceleration in a way pound-mass isn’t, making it useful in Newtonian mechanics.
How accurate is the conversion value provided?
The value 14.5939 kg per slug is precise to four decimal places, sufficient for most engineering and scientific calculations. Slight variations may occur if rounded differently, but they are usually negligible for practical use.
Last Updated : 22 June, 2025
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Sandeep Bhandari holds a Bachelor of Engineering in Computers from Thapar University (2006). He has 20 years of experience in the technology field. He has a keen interest in various technical fields, including database systems, computer networks, and programming. You can read more about him on his bio page.