Atomic Mass Unit to Megagram
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How to Convert Atomic Mass Unit to Megagram
To convert u to kg: multiply by 1.6605390666 × 10⁻²⁷. To convert u to MeV/c²: multiply by 931.494.
1 u = 1.6605390666 × 10⁻²⁷ kg = 1/Nₐ grams ≈ 931.494 MeV/c².
For example, 1 Atomic Mass Unit (u) = 1.660539e-30 Megagram (Mg).
Atomic Mass Unit to Megagram — Common Values
| Atomic Mass Unit (u) | Megagram (Mg) |
|---|---|
| 0.1 | 1.660539e-31 |
| 0.5 | 8.302695e-31 |
| 1 | 1.660539e-30 |
| 2 | 3.321078e-30 |
| 5 | 8.302695e-30 |
| 10 | 1.660539e-29 |
| 25 | 4.151348e-29 |
| 50 | 8.302695e-29 |
| 100 | 1.660539e-28 |
| 500 | 8.302695e-28 |
| 1000 | 1.660539e-27 |
About Atomic Mass Unit (u)
The atomic mass unit (unified) is defined as 1/12 the mass of a carbon-12 atom, approximately 1.661 × 10⁻²⁷ kilograms.
1 u = 1.6605390666 × 10⁻²⁷ kg = 1/Nₐ grams ≈ 931.494 MeV/c².
To convert u to kg: multiply by 1.6605390666 × 10⁻²⁷. To convert u to MeV/c²: multiply by 931.494.
Molecular weight calculations, mass spectrometry data interpretation, and chemical stoichiometry.
A proton has a mass of ~1.007 u, a neutron ~1.009 u. The discrepancy from 1.000 reflects nuclear binding energy.
Confusing 'amu' (the old, obsolete term) with 'u' (the unified standard). Also, forgetting that 1 u ≠ 1 gram.
Think of u as 'approximately the mass of one proton or neutron.' Carbon-12 = 12 u exactly (by definition).
