Pound to Slug Converter
Convert Pound (lb) to Slug (slug) instantly. 1 lb = 0.031081 slug.
Mass Converter
26 units available
1 lb = 0.031081 slug
Formula:
slug = lb × 0.03108095With your value: 1 lb = 0.03108095 slug
How big is that?
Everyday references on a logarithmic scale, all expressed in pound so you can sanity-check the result.
Other Pound to Slug conversions
Pound to Slug Conversion Table
| Pound (lb) | Slug (slug) |
|---|---|
| 0.5 | 0.01554 |
| 1 | 0.031081 |
| 2 | 0.062162 |
| 5 | 0.155405 |
| 10 | 0.31081 |
| 15 | 0.466214 |
| 20 | 0.621619 |
| 25 | 0.777024 |
| 50 | 1.554048 |
| 100 | 3.108095 |
| 250 | 7.770238 |
| 500 | 15.540475 |
| 1000 | 31.08095 |
Slug to Pound Conversion Table
| Slug (slug) | Pound (lb) |
|---|---|
| 0.5 | 16.087024 |
| 1 | 32.174049 |
| 2 | 64.348097 |
| 5 | 160.870243 |
| 10 | 321.740487 |
| 15 | 482.61073 |
| 20 | 643.480974 |
| 25 | 804.351217 |
| 50 | 1,608.702435 |
| 100 | 3,217.404869 |
| 250 | 8,043.512174 |
| 500 | 16,087.024347 |
| 1000 | 32,174.048695 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Pound (lb)
Mass
1 avoirdupois pound = 0.453 592 37 kg exactly (1959 international agreement).
Source: International Yard and Pound Agreement of 1959; NIST Federal Register Notice 59-5442
US, UK, Canada, Australia, New Zealand, South Africa · Reviewed 2026-07-01
Slug (slug)
Mass
Traceable to the kilogram, defined by fixing the Planck constant at 6.626 070 15 × 10⁻³⁴ J·s. Avoirdupois masses derive from the 1959 international pound (0.453 592 37 kg exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Pound to Slug
To convert from Pound (lb) to Slug (slug), multiply the value by 0.03108095.
Formula: slug = lb × 0.03108095
Reverse: lb = slug × 32.1740486949
Step-by-Step Example
- Start with your value in Pound. For example: 5 lb
- Multiply by the conversion factor: 5 x 0.03108095
- The result is: 0.155405 slug
About Pound
The pound (lb) is an imperial unit of mass equal to exactly 0.45359237 kilograms. It is the primary unit of weight in the United States.
Fun Fact: The abbreviation "lb" comes from the Latin "libra pondo" meaning "a pound by weight."
Common uses: body weight (US), food packaging, shipping.
About Slug
The slug is the unit of mass in the English engineering system: the mass accelerated at 1 ft/s² by 1 pound-force, about 14.5939 kg.
Common uses: aerospace engineering, US fluid mechanics.
Frequently Asked Questions
How many Slug are in 1 Pound?
There are exactly 0.03108095 Slug in 1 Pound. This means the conversion factor from Pound to Slug is 0.03108095.
What is the formula to convert Pound to Slug?
The formula to convert Pound to Slug is: slug = lb × 0.03108095. For example, to convert 10 Pound to Slug, you would multiply 10 by 0.03108095.
What is a Pound?
The pound (lb) is an imperial unit of mass equal to exactly 0.45359237 kilograms. It is the primary unit of weight in the United States.
What is a Slug?
The slug is the unit of mass in the English engineering system: the mass accelerated at 1 ft/s² by 1 pound-force, about 14.5939 kg.
What are the common uses of Pound?
The Pound is commonly used in body weight (US), food packaging, shipping.
Related Mass Conversions
Cite this page
UnitConvertLab. (2026). Pound to Slug converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/pound-to-slug