Kilogram to Atomic Mass Unit Converter
Convert Kilogram (kg) to Atomic Mass Unit (u) instantly. 1 kg = 6.022141e+26 u.
Mass Converter
26 units available
1 kg = 6.022141e+26 u
Formula:
u = kg × 6.022141e+26With your value: 1 kg = 6.022141e+26 u
How big is that?
Everyday references on a logarithmic scale, all expressed in kilogram so you can sanity-check the result.
Other Kilogram to Atomic Mass Unit conversions
Kilogram to Atomic Mass Unit Conversion Table
| Kilogram (kg) | Atomic Mass Unit (u) |
|---|---|
| 0.5 | 3.011070e+26 |
| 1 | 6.022141e+26 |
| 2 | 1.204428e+27 |
| 5 | 3.011070e+27 |
| 10 | 6.022141e+27 |
| 15 | 9.033211e+27 |
| 20 | 1.204428e+28 |
| 25 | 1.505535e+28 |
| 50 | 3.011070e+28 |
| 100 | 6.022141e+28 |
| 250 | 1.505535e+29 |
| 500 | 3.011070e+29 |
| 1000 | 6.022141e+29 |
Atomic Mass Unit to Kilogram Conversion Table
| Atomic Mass Unit (u) | Kilogram (kg) |
|---|---|
| 0.5 | 8.302695e-28 |
| 1 | 1.660539e-27 |
| 2 | 3.321078e-27 |
| 5 | 8.302695e-27 |
| 10 | 1.660539e-26 |
| 15 | 2.490809e-26 |
| 20 | 3.321078e-26 |
| 25 | 4.151348e-26 |
| 50 | 8.302695e-26 |
| 100 | 1.660539e-25 |
| 250 | 4.151348e-25 |
| 500 | 8.302695e-25 |
| 1000 | 1.660539e-24 |
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.
Kilogram (kg)
Mass
The kilogram is defined by taking the Planck constant to be exactly 6.626 070 15 × 10⁻³⁴ J·s.
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 Kilogram to Atomic Mass Unit
To convert from Kilogram (kg) to Atomic Mass Unit (u), multiply the value by 6.022141e+26.
Formula: u = kg × 6.022141e+26
Reverse: kg = u × 1.660539e-27
Step-by-Step Example
- Start with your value in Kilogram. For example: 5 kg
- Multiply by the conversion factor: 5 x 6.022141e+26
- The result is: 3.011070e+27 u
About Kilogram
The kilogram is the base unit of mass in the SI system. Since 2019, it is defined by the Planck constant rather than a physical artifact.
Fun Fact: Until 2019, the kilogram was defined by a platinum-iridium cylinder kept in Paris, called "Le Grand K."
Common uses: body weight, cooking, shipping.
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 Kilogram?
There are exactly 6.022141e+26 Atomic Mass Unit in 1 Kilogram. This means the conversion factor from Kilogram to Atomic Mass Unit is 6.022141e+26.
What is the formula to convert Kilogram to Atomic Mass Unit?
The formula to convert Kilogram to Atomic Mass Unit is: u = kg × 6.022141e+26. For example, to convert 10 Kilogram to Atomic Mass Unit, you would multiply 10 by 6.022141e+26.
What is a Kilogram?
The kilogram is the base unit of mass in the SI system. Since 2019, it is defined by the Planck constant rather than a physical artifact.
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 Kilogram?
The Kilogram is commonly used in body weight, cooking, shipping.
Related Mass Conversions
Cite this page
UnitConvertLab. (2026). Kilogram to Atomic Mass Unit converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/kilogram-to-atomic_mass_unit