Convert Atomic Mass Unit to Planck Mass
Convert atomic mass unit to planck mass instantly. 1 atomic mass unit = 7.62867e-20 planck mass — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Planck Mass 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.
Planck Mass
The Planck mass equals about 2.18E-8 kg, formed from the constants h-bar, c, and G.
Introduced by Max Planck in 1899 as part of a system of natural units.
Theoretical physics and quantum-gravity research.
Defined by Planck in 1899 from fundamental constants.
Atomic Mass Unit to Planck Mass conversion formula
Note: this conversion uses a generally accepted modern value. Historical and regional definitions of this unit varied across times and places.
The relationship between atomic mass unit and planck mass:
To convert atomic mass unit to planck mass, multiply the value in atomic mass unit by 7.62867e-20. To reverse, multiply planck mass by 1.310845e+19.
How to use this converter
Type a value into the calculator. The result in planck mass updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Planck Mass to Atomic Mass Unit converter for the reverse direction.
Step-by-step: convert atomic mass unit to planck mass
- Write down the value in atomic mass unit (u).
- Multiply that value by the factor 7.62867e-20.
- The product is the equivalent value in planck mass (mP).
- To reverse, multiply the planck mass value by 1.310845e+19.
Worked examples
Example 1 — Convert 1 u to mP:
1 × 7.62867e-20 = 7.62867e-20 mP
Example 2 — Convert 100 u to mP:
100 × 7.62867e-20 = 7.62867e-18 mP
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 × 7.62867e-20 = 1.525734e-19 mP
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 planck mass for direct comparison with another instrument's calibration data sheet.
800 u × 7.62867e-20 = 6.102936e-17 mP
Atomic Mass Unit to Planck Mass conversion table
Standard reference values for converting atomic mass unit to planck mass:
| Atomic Mass Unit [u] | Planck Mass [mP] |
|---|---|
| 0.01 | 7.62867e-22 |
| 0.1 | 7.62867e-21 |
| 1 | 7.62867e-20 |
| 2 | 1.525734e-19 |
| 3 | 2.288601e-19 |
| 4 | 3.051468e-19 |
| 5 | 3.814335e-19 |
| 10 | 7.62867e-19 |
| 20 | 1.525734e-18 |
| 30 | 2.288601e-18 |
| 40 | 3.051468e-18 |
| 50 | 3.814335e-18 |
| 100 | 7.62867e-18 |
| 500 | 3.814335e-17 |
| 1000 | 7.62867e-17 |
Frequently asked questions
How many planck mass is 1 atomic mass unit?
How do I convert atomic mass unit to planck mass?
How do I convert planck mass back to atomic mass unit?
How many planck mass is 100 atomic mass unit?
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Sources & references
Conversion factor (1 u = 7.62867e-20 mP) 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.