An avoirdupois ounce is 1/16 pound.
Ounces to Slugs Converter — oz to slug
Convert Ounce (oz) to Slug (slug) using the exact conversion factor (1 ounce = 0.0019425594 slug). See the formula, worked examples, conversion table, history, and common uses.
Ounces to Slugs converter
Converter
Mass/Weight Converter
Convert SI mass, imperial weight, jewelry, atomic, and astronomy mass units.
Context values
Some unit families need one extra value for a physically accurate result.
A slug is an imperial mass unit.
Result = input x 0.02834952313 / 14.59390294.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Ounces to Slugs
Weight conversions between Ounce and Slug come up constantly in everyday commerce, shipping, and cooking, since US packaging is usually labeled in pounds while most of the rest of the world uses kilograms. Ounce is most often used for us cooking and recipe measurement (small quantities).
Formula
slugs = ounces × 0.00194255938572
This factor comes from each unit's defined relationship to the category's base unit: 1 ounce equals 0.028349523125 base units, and 1 slug equals 14.5939029372 base units, so dividing one by the other gives the direct ounce-to-slug factor of 0.00194255938572.
Simple example
1 oz × 0.001942559386 = 0.0019425594 slug
1 ounce = 0.0019425594 slugs.
Real-world example
50 oz × 0.001942559386 = 0.0971279693 slug
50 ounces = 0.0971279693 slugs.
Conversion table
| Ounce (oz) | Slug (slug) |
|---|---|
| 1 oz | 0.0019425594 slug |
| 5 oz | 0.0097127969 slug |
| 10 oz | 0.0194255939 slug |
| 25 oz | 0.0485639846 slug |
| 50 oz | 0.0971279693 slug |
| 100 oz | 0.1942559386 slug |
Reverse conversion: Slug to Ounce
0.0019425594 slug × 514.7847769 = 1.000000007 oz
0.0019425594 slugs = 1.000000007 ounces.
ounces = slugs × 514.784776903
For a page dedicated to this direction, see Slug to Ounce.
Understanding the Ounce
Ounce (oz) measures mass. The avoirdupois ounce is 1/16 of a pound: exactly 28.349523125 grams. It is classified as a US/imperial customary unit.
Where it's used: United States (cooking, postal, retail) United Kingdom (informal/retail use)
Avoirdupois ounce vs. troy ounce. The everyday ounce (avoirdupois, 28.35 g) used for cooking and shipping is a different, smaller unit than the troy ounce (31.10 g) used for precious metals like gold and silver — this page uses the everyday avoirdupois ounce.
Uses of the Ounce today
- US cooking and recipe measurement (small quantities)
- US postal and shipping weight
- Precious metals (troy ounce, a related but distinct unit)
History of the Ounce
The ounce descends from the Roman 'uncia' (a twelfth part), inherited through medieval English weight systems; the avoirdupois ounce (for general goods, as opposed to the troy ounce for precious metals) became standard for everyday trade, fixed at exactly 28.349523125 g via the pound's 1959 international standardization.
Historical origin. Ounce was not the invention of a single named person; it developed through the process described above.
Understanding the Slug (slug)
A slug is an imperial mass unit.
Ounce — sources
- NIST — International yard and pound (1959) — Basis for the modern ounce via the standardized pound.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many slugs are in 1 ounce?
1 ounce equals 0.0019425594 slugs, using the exact defined conversion factor rather than an estimate.
How do I convert ounce to slug?
Multiply the ounce value by 0.001942559386. The converter above does this instantly to whatever precision you set.
How do I convert slug back to ounce?
Use the reverse factor: 1 slug equals 514.7847769 ounces. You can also use the swap control in the converter above to flip the direction instantly.
What is a ounce?
Ounce (oz) measures mass. The avoirdupois ounce is 1/16 of a pound: exactly 28.349523125 grams. It is classified as a US/imperial customary unit.
What is a slug?
Slug (slug) is a unit of mass/weight.
Is the ounce to slug conversion exact?
Yes. The avoirdupois ounce is 1/16 of a pound: exactly 28.349523125 grams. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
What is the difference between avoirdupois ounce vs. troy ounce?
The everyday ounce (avoirdupois, 28.35 g) used for cooking and shipping is a different, smaller unit than the troy ounce (31.10 g) used for precious metals like gold and silver — this page uses the everyday avoirdupois ounce.
Where is the ounce still used today?
United States (cooking, postal, retail) United Kingdom (informal/retail use)