Dalton to Electron Mass (rest) Converter
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34 units available
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How to Convert Dalton to Electron Mass (rest)
To convert Da to kg: multiply by 1.6605390666 × 10⁻²⁷. 1 kDa = 1,000 Da.
1 Da = 1 u = 1.6605390666 × 10⁻²⁷ kg. Proteins range from ~5 kDa to >1,000 kDa.
For example, 1 Dalton (Da) = 1822.888486 Electron Mass (rest) (mₑ).
Dalton to Electron Mass (rest) — Common Values
| Dalton (Da) | Electron Mass (rest) (mₑ) |
|---|---|
| 0.1 | 182.2888486 |
| 0.5 | 911.4442431 |
| 1 | 1822.888486 |
| 2 | 3645.776972 |
| 5 | 9114.442431 |
| 10 | 18228.88486 |
| 25 | 45572.21216 |
| 50 | 91144.42431 |
| 100 | 182288.8486 |
| 500 | 911444.2431 |
| 1000 | 1822888.486 |
About Dalton (Da)
Definition
The dalton is a unit of mass equal to one unified atomic mass unit (1/12 of a carbon-12 atom), approximately 1.661 × 10⁻²⁷ kg.
Mathematical Relationship
1 Da = 1 u = 1.6605390666 × 10⁻²⁷ kg. Proteins range from ~5 kDa to >1,000 kDa.
Conversion Formula
To convert Da to kg: multiply by 1.6605390666 × 10⁻²⁷. 1 kDa = 1,000 Da.
Practical Applications
Protein molecular weights (hemoglobin ≈ 64.5 kDa), DNA fragment sizing, and antibody characterization.
Interesting Facts
Titin, the largest known protein, has a molecular weight of about 3,800 kDa (3.8 MDa). The average protein is ~40–50 kDa.
Common Mistakes
The dalton and u are identical — they're just preferred in different fields (Da in biology, u in chemistry/physics).
Educational Tips
If a paper says a protein is '50 kDa,' that's 50,000 atomic mass units — about 50,000 hydrogen atoms' worth of mass.
About Electron Mass (rest) (mₑ)
Definition
The electron rest mass is the mass of a stationary electron, approximately 9.109 × 10⁻³¹ kilograms.
Mathematical Relationship
mₑ ≈ 9.109 × 10⁻³¹ kg = 5.486 × 10⁻⁴ u = 1/1836 of a proton mass.
Conversion Formula
To convert electron masses to kg: multiply by 9.1093837015 × 10⁻³¹.
Practical Applications
Essential for electron microscope design, semiconductor physics, and laser technology.
Interesting Facts
The electron is about 1,836 times lighter than a proton. An electron's mass-energy equivalent (E=mc²) is 0.511 MeV.
Common Mistakes
Confusing electron mass with electron charge (e). Mass = 9.1 × 10⁻³¹ kg; charge = 1.6 × 10⁻¹⁹ C.
Educational Tips
Key ratio: proton-to-electron mass ≈ 1,836. This ratio explains why electrons orbit nuclei rather than the reverse.