12 daltons
1.993 × 10⁻²⁶ kgMass · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Mass
Just how heavy is 12 daltons?
Particles & molecules
12 Da
12 daltons
The quantity is exact as entered.
1.993 × 10⁻²⁶ kgMass in kilograms
0 kg
Water molecule
A water molecule is a group of two hydrogen atoms bonded to one oxygen atom.
2.992 × 10⁻²⁶ kgMass in kilograms
0 kg
Bar length measures mass, not physical size. Both bars start at zero kilograms (kg). Pictures identify the objects only.
A little perspective
The mass of a water molecule is about 1.5 times 12 daltons.
Measurements, assumptions & sources +
12 daltons
Mass: 1.993 × 10⁻²⁶ kg; definition.
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Water molecule
Mass: 2.992 × 10⁻²⁶ kg; representative.
A chosen 0.28 nm molecular-scale model. Effective molecular size depends on the definition.
University of Utah — Cell size and scale
The marked mass is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
Compare 12 daltons with the mass of a water molecule. The notes below explain how each value was chosen.
Water molecule
2.992 × 10⁻²⁶ kgMass · representative
A chosen 0.28 nm molecular-scale model. Effective molecular size depends on the definition.
- Comparing
- Mass ↔ Mass
- Relative size
- The mass of a water molecule is about 1.5 times 12 daltons. The mass of a water molecule is approximately 50.1% greater than 12 daltons.
How to read the visual
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
- The mass of a water molecule: This is a representative comparison value; individual specimens or conditions can vary.
Mass is distinct from weight: an object’s mass stays the same as gravity changes.
1.9926 × 10⁻²⁶ kgkilograms
4.393 × 10⁻²⁶ lbpounds
1.9926 × 10⁻²⁹ ttonnes
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