Convert Ounce to Slug
Convert ounces to slugs instantly. 1 ounce = 0.0019425594 slug — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Slug to Ounce converter for the reverse conversion.
Units explained
Ounce
The (avoirdupois) ounce (oz) equals one-sixteenth of a pound, about 28.35 grams.
From Latin 'uncia', meaning a twelfth part.
US food portions, postal weights, and boxing weight classes.
Standardized as 1/16 of the international pound from 1959.
Slug
The slug is the mass that accelerates at 1 ft/s^2 under a force of one pound-force, about 14.59 kg.
Coined in the early 20th century for the British gravitational (engineering) system.
US and British engineering dynamics.
Introduced in the British gravitational system of units.
Ounce to Slug conversion formula
The relationship between ounces and slugs:
To convert ounces to slugs, multiply the value in ounces by 0.0019425594. To reverse, multiply slugs by 514.7847773566.
How to use this converter
Type a value into the calculator. The result in slugs updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Slug to Ounce converter for the reverse direction.
Step-by-step: convert ounces to slugs
- Write down the value in ounces (oz).
- Multiply that value by the factor 0.0019425594.
- The product is the equivalent value in slugs (slug).
- To reverse, multiply the slug value by 514.7847773566.
Worked examples
Example 1 — Convert 1 oz to slug:
1 × 0.0019425594 = 0.0019425594 slug
Example 2 — Convert 100 oz to slug:
100 × 0.0019425594 = 0.1942559384 slug
Real-world example — Ruler-scale measurements
A 30-ounce school ruler converts cleanly to slugs — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 oz × 0.0019425594 = 0.0582767815 slug
Real-world example — Hardware-scale dimensions
A 10-ounce fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between ounces and slugs daily when mixing metric and imperial tools.
10 oz × 0.0019425594 = 0.0194255938 slug
Real-world example — Postcard and small-object dimensions
A postcard is about 5 ounces wide. Converting to slugs is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 oz × 0.0019425594 = 0.0097127969 slug
Ounce to Slug conversion table
Standard reference values for converting ounces to slugs:
| Ounce [oz] | Slug [slug] |
|---|---|
| 0.01 | 1.942559e-5 |
| 0.1 | 0.0001942559 |
| 1 | 0.0019425594 |
| 2 | 0.0038851188 |
| 3 | 0.0058276782 |
| 4 | 0.0077702375 |
| 5 | 0.0097127969 |
| 10 | 0.0194255938 |
| 20 | 0.0388511877 |
| 30 | 0.0582767815 |
| 40 | 0.0777023754 |
| 50 | 0.0971279692 |
| 100 | 0.1942559384 |
| 500 | 0.971279692 |
| 1000 | 1.942559384 |
Frequently asked questions
How many slugs is 1 ounce?
How do I convert ounces to slugs?
How do I convert slugs back to ounces?
How many slugs is 100 ounces?
Popular weight unit conversions
Convert Ounce to other weight units
Show all Ounce conversions
Metric / SI (18 units)
Avoirdupois (14 units)
Troy & Apothecary (10 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 oz = 0.0019425594 slug) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.