Milligram to Atomic Mass Unit Converter
Convert Milligram (mg) to Atomic Mass Unit (u) instantly. 1 mg = 6.022141e+20 u.
Mass Converter
26 units available
1 mg = 6.022141e+20 u
Formula:
u = mg × 6.022141e+20With your value: 1 mg = 6.022141e+20 u
How big is that?
Everyday references on a logarithmic scale, all expressed in milligram so you can sanity-check the result.
Other Milligram to Atomic Mass Unit conversions
Milligram to Atomic Mass Unit Conversion Table
| Milligram (mg) | Atomic Mass Unit (u) |
|---|---|
| 0.5 | 3.011070e+20 |
| 1 | 6.022141e+20 |
| 2 | 1.204428e+21 |
| 5 | 3.011070e+21 |
| 10 | 6.022141e+21 |
| 15 | 9.033211e+21 |
| 20 | 1.204428e+22 |
| 25 | 1.505535e+22 |
| 50 | 3.011070e+22 |
| 100 | 6.022141e+22 |
| 250 | 1.505535e+23 |
| 500 | 3.011070e+23 |
| 1000 | 6.022141e+23 |
Atomic Mass Unit to Milligram Conversion Table
| Atomic Mass Unit (u) | Milligram (mg) |
|---|---|
| 0.5 | 8.302695e-22 |
| 1 | 1.660539e-21 |
| 2 | 3.321078e-21 |
| 5 | 8.302695e-21 |
| 10 | 1.660539e-20 |
| 15 | 2.490809e-20 |
| 20 | 3.321078e-20 |
| 25 | 4.151348e-20 |
| 50 | 8.302695e-20 |
| 100 | 1.660539e-19 |
| 250 | 4.151348e-19 |
| 500 | 8.302695e-19 |
| 1000 | 1.660539e-18 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Milligram (mg)
Mass
Traceable to the kilogram, defined by fixing the Planck constant at 6.626 070 15 × 10⁻³⁴ J·s. Avoirdupois masses derive from the 1959 international pound (0.453 592 37 kg exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Atomic Mass Unit (u)
Mass
The unified atomic mass unit is 1/12 the mass of a free carbon-12 atom: 1.660 539 068 92(52) × 10⁻²⁷ kg.
Experimentally determined; the last digits carry the CODATA 2022 uncertainty.
Source: CODATA Internationally Recommended Values of the Fundamental Physical Constants (2022 adjustment)
CODATA / NIST · Reviewed 2026-07-01
How to Convert Milligram to Atomic Mass Unit
To convert from Milligram (mg) to Atomic Mass Unit (u), multiply the value by 6.022141e+20.
Formula: u = mg × 6.022141e+20
Reverse: mg = u × 1.660539e-21
Step-by-Step Example
- Start with your value in Milligram. For example: 5 mg
- Multiply by the conversion factor: 5 x 6.022141e+20
- The result is: 3.011070e+21 u
About Milligram
The milligram equals one thousandth of a gram and is the standard unit for drug dosage and nutrient quantities.
Common uses: medication dosage, nutrition labels, laboratory work.
About Atomic Mass Unit
The unified atomic mass unit (dalton) is 1/12 the mass of a carbon-12 atom, about 1.66054×10⁻²⁷ kg.
Common uses: chemistry, mass spectrometry, molecular biology.
Frequently Asked Questions
How many Atomic Mass Unit are in 1 Milligram?
There are exactly 6.022141e+20 Atomic Mass Unit in 1 Milligram. This means the conversion factor from Milligram to Atomic Mass Unit is 6.022141e+20.
What is the formula to convert Milligram to Atomic Mass Unit?
The formula to convert Milligram to Atomic Mass Unit is: u = mg × 6.022141e+20. For example, to convert 10 Milligram to Atomic Mass Unit, you would multiply 10 by 6.022141e+20.
What is a Milligram?
The milligram equals one thousandth of a gram and is the standard unit for drug dosage and nutrient quantities.
What is a Atomic Mass Unit?
The unified atomic mass unit (dalton) is 1/12 the mass of a carbon-12 atom, about 1.66054×10⁻²⁷ kg.
What are the common uses of Milligram?
The Milligram is commonly used in medication dosage, nutrition labels, laboratory work.
Related Mass Conversions
Cite this page
UnitConvertLab. (2026). Milligram to Atomic Mass Unit converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/milligram-to-atomic_mass_unit