Atomic mass unit to Kilogram Converter

Enter the value that you want to convert Atomic mass unit (Da, u) to kilogram (kg) or kilogram to Atomic mass unit.Also written as DA, U to KG conversion.

1 Atomic mass unit = 0.0000000 kilogram

Formula: kilogram = Atomic mass unit value × 0.0000000

DA, U to KG — Atomic mass unit to kilogram

Value

Da, u

Result

0.00000kg

10 Atomic mass unit = 0.00000 kilogram

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Converting Atomic mass unit to Kilogram

Understanding the Atomic mass unit

Atomic mass unit (Da, u) is a unit of weight measurement. 1 Atomic mass unit is equal to 0.0000000 kilogram.

The Kilogram Explained

Kilogram (kg) is a unit of weight measurement. 1 kilogram is equal to 6.022173643354832e+26 Atomic mass unit.

Understanding Weight Conversions

Weight unit conversions are among the most frequently performed in daily life. International commerce ships in metric tonnes and kilograms, while US domestic logistics uses pounds and ounces. Recipes from different countries use different systems — a European cake recipe in grams versus an American one in cups and ounces. Pharmacists convert between milligrams and grains for medication dosing. Athletes track body weight across metric and imperial systems depending on their country and sport federation requirements.

Atomic mass unit to kilogram metric conversion table

0.01 Da, u	=	0.00000 kg
0.1 Da, u	=	0.00000 kg
1 Da, u	=	0.00000 kg
2 Da, u	=	0.00000 kg
3 Da, u	=	0.00000 kg
4 Da, u	=	0.00000 kg
5 Da, u	=	0.00000 kg
6 Da, u	=	0.00000 kg
7 Da, u	=	0.00000 kg
8 Da, u	=	0.00000 kg
9 Da, u	=	0.00000 kg
10 Da, u	=	0.00000 kg
11 Da, u	=	0.00000 kg
12 Da, u	=	0.00000 kg
13 Da, u	=	0.00000 kg
14 Da, u	=	0.00000 kg
15 Da, u	=	0.00000 kg
16 Da, u	=	0.00000 kg
17 Da, u	=	0.00000 kg
18 Da, u	=	0.00000 kg

19 Da, u	=	0.00000 kg
20 Da, u	=	0.00000 kg
30 Da, u	=	0.00000 kg
40 Da, u	=	0.00000 kg
50 Da, u	=	0.00000 kg
60 Da, u	=	0.00000 kg
70 Da, u	=	0.00000 kg
80 Da, u	=	0.00000 kg
90 Da, u	=	0.00000 kg
100 Da, u	=	0.00000 kg
200 Da, u	=	0.00000 kg
300 Da, u	=	0.00000 kg
400 Da, u	=	0.00000 kg
500 Da, u	=	0.00000 kg
600 Da, u	=	0.00000 kg
700 Da, u	=	0.00000 kg
800 Da, u	=	0.00000 kg
900 Da, u	=	0.00000 kg
1000 Da, u	=	0.00000 kg

How to Convert DA, U to KG (Atomic mass unit to Kilogram)?

We can convert Atomic mass unit to kilogram by using an example.

Example:

Convert 20 Atomic mass unit to Kilogram?

We know 1 Atomic mass unit = 0.0000000 kilogram; 1 Kilogram = 6.022173643354832e+26 Atomic mass unit.

20 Atomic mass unit = ___kg

20 × 0.0000000 = 0.00000 kg (we know 1 Atomic mass unit = 0.0000000 kilogram)

Answer:

20 Atomic mass unit = 0.00000 kilogram

How to Convert Atomic Mass Units to Kilograms (Step-by-Step)

One atomic mass unit (amu or u) equals 1.66054 * 10^-27 kilograms. The amu is defined as one-twelfth the mass of a carbon-12 atom and is the standard unit for expressing atomic and molecular masses in chemistry and physics.

Identify the mass in atomic mass units (amu).
Multiply by 1.66054 * 10^-27 to get the value in kilograms.
For molecular masses: sum all atomic masses in amu first, then convert the total.
Verify: 1 amu = 1.66054 * 10^-27 kg; Avogadro number of amu = 1 gram.

💡 Tip: The relationship between amu and grams is elegant: 1 mole (6.022 * 10^23) of atoms each weighing 1 amu totals exactly 1 gram. This is the bridge between atomic-scale and macroscopic measurements.

Common AMU to Kilogram Conversions

Reference values for atomic and molecular masses used in chemistry and physics.

Atomic mass unit	Kilogram	Note
1 amu	1.661 * 10^-27 kg	Hydrogen atom (approx)
4 amu	6.642 * 10^-27 kg	Helium-4 atom
12 amu	1.993 * 10^-26 kg	Carbon-12 (definition)
16 amu	2.657 * 10^-26 kg	Oxygen atom
56 amu	9.299 * 10^-26 kg	Iron atom (approx)
197 amu	3.271 * 10^-25 kg	Gold atom
238 amu	3.952 * 10^-25 kg	Uranium-238

Solved Examples: AMU to Kilograms

Question 1: A water molecule (H2O) has a molecular mass of 18.015 amu. Convert to kg.

Solution:

Mass in kg = 18.015 * 1.66054 * 10^-27

= 2.992 * 10^-26 kg

Answer: One water molecule weighs 2.992 * 10^-26 kg.

Question 2: The mass of a proton is 1.00728 amu. Express in kilograms.

Solution:

Mass in kg = 1.00728 * 1.66054 * 10^-27

= 1.673 * 10^-27 kg

Answer: A proton weighs 1.673 * 10^-27 kg.

Question 3: A hemoglobin molecule has mass ~64,500 amu. Convert to kg.

Solution:

Mass in kg = 64,500 * 1.66054 * 10^-27

= 1.071 * 10^-22 kg

Answer: One hemoglobin molecule weighs about 1.07 * 10^-22 kg.

Question 4: Convert 200 amu to kilograms (approximate mass of a gold atom).

Solution:

Mass in kg = 200 * 1.66054 * 10^-27

= 3.321 * 10^-25 kg

Answer: 200 amu = 3.321 * 10^-25 kg.

Practice Questions: AMU to Kilograms

Try solving these on your own to test your understanding:

Convert 14 amu (nitrogen atom) to kg. (Answer: 2.325 * 10^-26 kg)
A glucose molecule weighs 180.16 amu. Express in kg. (Answer: 2.992 * 10^-25 kg)
The neutron mass is 1.00866 amu. Convert to kg. (Answer: 1.675 * 10^-27 kg)
How many amu equal 1 kg? (Answer: 6.022 * 10^26 amu)
A DNA base pair averages 650 amu. Convert to kg. (Answer: 1.079 * 10^-24 kg)

The AMU and Avogadro Constant

The atomic mass unit is defined so that exactly 1 mole (6.02214076 * 10^23) of entities each with mass 1 amu totals exactly 1 gram (0.001 kg). This elegant relationship connects the microscopic world (individual atoms) to the macroscopic world (laboratory quantities). The number 6.022 * 10^23 is Avogadro constant, and it equals 1 g / 1 amu.

AMU in Chemistry vs Physics

Chemists use amu (or "unified atomic mass unit" u) to express atomic and molecular weights on the periodic table. Physicists use it for nuclear masses and particle physics calculations. In 2019, the kg was redefined via the Planck constant, which slightly changed the exact relationship but the practical value 1 amu = 1.66054 * 10^-27 kg remains standard.

Practical Applications of AMU-to-kg Conversion

Mass spectrometry instruments detect ions by mass-to-charge ratio in amu. Converting to kg is needed for calculating kinetic energies, gravitational effects, and other physical quantities. In nanotechnology and molecular biology, knowing individual molecular masses in kg helps compute diffusion rates, sedimentation coefficients, and binding energies.

Key Takeaways

1 amu = 1.66054 * 10^-27 kg (extremely small).
Defined as 1/12 the mass of a carbon-12 atom.
1 mole of 1-amu particles = exactly 1 gram.
Used for atomic/molecular masses in chemistry and physics.
Avogadro constant (6.022 * 10^23) bridges amu to grams.
Also written as "u" (unified atomic mass unit) or "Da" (dalton).

Atomic mass unit to Kilogram Conversion Formula

kilogram = Atomic mass unit × 0.0000000

1 Atomic mass unit = 0.0000000 kilogram

1 kilogram = 6.022173643354832e+26 Atomic mass unit

Reverse: Atomic mass unit = kilogram × 6.022173643354832e+26

Frequently Asked Questions

How many kilogram are in 1 Atomic mass unit?

There are 0.0000000 kilogram in 1 Atomic mass unit. To convert Atomic mass unit to kilogram, multiply the value by 0.0000000.

How do I convert Atomic mass unit to kilogram?

Multiply your Atomic mass unit value by 0.0000000 to get the equivalent in kilogram. For example, 5 Atomic mass unit = 5 × 0.0000000 = 0.00000 kilogram.

How do I convert kilogram to Atomic mass unit?

Multiply your kilogram value by 6.022173643354832e+26 to get the equivalent in Atomic mass unit. Alternatively, divide by 0.0000000.

What is 10 Atomic mass unit in kilogram?

10 Atomic mass unit is equal to 0.00000 kilogram.

What is 100 Atomic mass unit in kilogram?

100 Atomic mass unit is equal to 0.00000 kilogram.