Convert Atomic Mass Unit to Slug
Convert atomic mass unit to slugs instantly. 1 atomic mass unit = 1.137831e-28 slug — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Slug to Atomic Mass Unit converter for the reverse conversion.
Units explained
Atomic Mass Unit
One unified atomic mass unit (u) is defined as 1/12 the mass of a carbon-12 atom, about 1.6605E-27 kg.
Introduced to give atomic and molecular masses convenient numerical values.
Atomic, molecular, and nuclear physics and chemistry.
The unified (carbon-12) scale was adopted by IUPAC and IUPAP in 1960-1961.
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.
Atomic Mass Unit to Slug conversion formula
The relationship between atomic mass unit and slugs:
To convert atomic mass unit to slugs, multiply the value in atomic mass unit by 1.137831e-28. To reverse, multiply slugs by 8.788648e+27.
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 Atomic Mass Unit converter for the reverse direction.
Step-by-step: convert atomic mass unit to slugs
- Write down the value in atomic mass unit (u).
- Multiply that value by the factor 1.137831e-28.
- The product is the equivalent value in slugs (slug).
- To reverse, multiply the slug value by 8.788648e+27.
Worked examples
Example 1 — Convert 1 u to slug:
1 × 1.137831e-28 = 1.137831e-28 slug
Example 2 — Convert 100 u to slug:
100 × 1.137831e-28 = 1.137831e-26 slug
Real-world example — Molecular dimensions
The diameter of small molecular structures (around 2 atomic mass unit) is often converted into related sub-micron units when comparing measurements across different microscopy techniques or imaging modalities.
2 u × 1.137831e-28 = 2.275663e-28 slug
Real-world example — Wavelengths across the spectrum
Optical and atomic-scale phenomena are routinely cross-converted between sub-micron units. A photon of wavelength 800 atomic mass unit can be re-expressed in slugs for direct comparison with another instrument's calibration data sheet.
800 u × 1.137831e-28 = 9.102652e-26 slug
Atomic Mass Unit to Slug conversion table
Standard reference values for converting atomic mass unit to slugs:
| Atomic Mass Unit [u] | Slug [slug] |
|---|---|
| 0.01 | 1.137831e-30 |
| 0.1 | 1.137831e-29 |
| 1 | 1.137831e-28 |
| 2 | 2.275663e-28 |
| 3 | 3.413494e-28 |
| 4 | 4.551326e-28 |
| 5 | 5.689157e-28 |
| 10 | 1.137831e-27 |
| 20 | 2.275663e-27 |
| 30 | 3.413494e-27 |
| 40 | 4.551326e-27 |
| 50 | 5.689157e-27 |
| 100 | 1.137831e-26 |
| 500 | 5.689157e-26 |
| 1000 | 1.137831e-25 |
Frequently asked questions
How many slugs is 1 atomic mass unit?
How do I convert atomic mass unit to slugs?
How do I convert slugs back to atomic mass unit?
How many slugs is 100 atomic mass unit?
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Indian / South Asian (6 units)
Scientific / Atomic (8 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 u = 1.137831e-28 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.