Mass and Weight · Unit Converter

Convert Electron Mass (rest) to Atomic Mass Unit

Convert electron mass (rest) to atomic mass unit instantly. 1 electron mass (rest) = 0.0005485799 atomic mass unit — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Atomic Mass Unit to Electron Mass (rest) converter for the reverse conversion.

Written by Sunith Babu L, Ph.D., Lead Engineer Reviewed by Dr. Ashok Kumar K, Ph.D.
Mass and Weight category 2 min read Published Last reviewed Updated

Units explained

Scientific / Atomic

Electron Mass (rest)

What is a electron mass (rest)?

The electron rest mass is about 9.109E-31 kg.

Origin of the electron mass (rest)

The mass of the electron, the lightest charged elementary particle.

Where it is used

Atomic and particle physics.

When and where it was developed

Quantified after J. J. Thomson identified the electron in 1897.

Scientific / Atomic

Atomic Mass Unit

What is a atomic mass unit?

One unified atomic mass unit (u) is defined as 1/12 the mass of a carbon-12 atom, about 1.6605E-27 kg.

Origin of the atomic mass unit

Introduced to give atomic and molecular masses convenient numerical values.

Where it is used

Atomic, molecular, and nuclear physics and chemistry.

When and where it was developed

The unified (carbon-12) scale was adopted by IUPAC and IUPAP in 1960-1961.

Electron Mass (rest) to Atomic Mass Unit conversion formula

Note: this conversion uses a generally accepted modern value. Historical and regional definitions of this unit varied across times and places.

The relationship between electron mass (rest) and atomic mass unit:

1 me = 0.0005485799 u
1 u = 1822.8885300626 me

To convert electron mass (rest) to atomic mass unit, multiply the value in electron mass (rest) by 0.0005485799. To reverse, multiply atomic mass unit by 1822.8885300626.

How to use this converter

Type a value into the calculator. The result in atomic mass unit updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Atomic Mass Unit to Electron Mass (rest) converter for the reverse direction.

Step-by-step: convert electron mass (rest) to atomic mass unit

  1. Write down the value in electron mass (rest) (me).
  2. Multiply that value by the factor 0.0005485799.
  3. The product is the equivalent value in atomic mass unit (u).
  4. To reverse, multiply the atomic mass unit value by 1822.8885300626.

Worked examples

Example 1 — Convert 1 me to u:
1 × 0.0005485799 = 0.0005485799 u

Example 2 — Convert 100 me to u:
100 × 0.0005485799 = 0.0548579896 u

Real-world example — Wavelengths across the spectrum

Optical and atomic-scale phenomena are routinely cross-converted between sub-micron units. A photon of wavelength 800 electron mass (rest) can be re-expressed in atomic mass unit for direct comparison with another instrument's calibration data sheet.

800 me × 0.0005485799 = 0.4388639167 u

Real-world example — Molecular dimensions

The diameter of small molecular structures (around 2 electron mass (rest)) is often converted into related sub-micron units when comparing measurements across different microscopy techniques or imaging modalities.

2 me × 0.0005485799 = 0.0010971598 u

Electron Mass (rest) to Atomic Mass Unit conversion table

Standard reference values for converting electron mass (rest) to atomic mass unit:

Electron Mass (rest) [me]Atomic Mass Unit [u]
0.015.485799e-6
0.15.485799e-5
10.0005485799
20.0010971598
30.0016457397
40.0021943196
50.0027428995
100.005485799
200.0109715979
300.0164573969
400.0219431958
500.0274289948
1000.0548579896
5000.2742899479
10000.5485798959

Frequently asked questions

How many atomic mass unit is 1 electron mass (rest)?
1 electron mass (rest) equals 0.0005485799 atomic mass unit.
How do I convert electron mass (rest) to atomic mass unit?
Multiply the value in electron mass (rest) by 0.0005485799 to get atomic mass unit.
How do I convert atomic mass unit back to electron mass (rest)?
Multiply the value in atomic mass unit by 1822.8885300626, or use the Atomic Mass Unit to Electron Mass (rest) converter.
How many atomic mass unit is 100 electron mass (rest)?
100 electron mass (rest) equals 0.0548579896 atomic mass unit, because 100 × 0.0005485799 = 0.0548579896.

Convert Electron Mass (rest) to other weight units

Show all Electron Mass (rest) conversions
Metric / SI (18 units)
Electron Mass (rest) to Attogram (ag) Electron Mass (rest) to Femtogram (fg) Electron Mass (rest) to Picogram (pg) Electron Mass (rest) to Nanogram (ng) Electron Mass (rest) to Microgram (µg) Electron Mass (rest) to Milligram (mg) Electron Mass (rest) to Centigram (cg) Electron Mass (rest) to Decigram (dg) Electron Mass (rest) to Gram (g) Electron Mass (rest) to Dekagram (dag) Electron Mass (rest) to Hectogram (hg) Electron Mass (rest) to Kilogram (kg) Electron Mass (rest) to Quintal (metric) (q) Electron Mass (rest) to Metric Ton (t) Electron Mass (rest) to Gigagram (Gg) Electron Mass (rest) to Teragram (Tg) Electron Mass (rest) to Petagram (Pg) Electron Mass (rest) to Exagram (Eg)
Avoirdupois (15 units)
Electron Mass (rest) to Grain (gr) Electron Mass (rest) to Dram (avoirdupois) (dr) Electron Mass (rest) to Ounce (oz) Electron Mass (rest) to Pound (lb) Electron Mass (rest) to Clove (clove) Electron Mass (rest) to Stone (US) (st) Electron Mass (rest) to Stone (UK) (st) Electron Mass (rest) to Quarter (US) (qr) Electron Mass (rest) to Quarter (UK) (qr) Electron Mass (rest) to Hundredweight (US) (cwt) Electron Mass (rest) to Hundredweight (UK) (cwt) Electron Mass (rest) to Wey (wey) Electron Mass (rest) to Kilopound (kip) (kip) Electron Mass (rest) to Ton (short, US) (sh tn) Electron Mass (rest) to Ton (long, UK) (long tn)
Troy & Apothecary (10 units)
Electron Mass (rest) to Point (1/100 carat) (pt) Electron Mass (rest) to Carat (metric) (ct) Electron Mass (rest) to Scruple (apothecary) (s ap) Electron Mass (rest) to Pennyweight (dwt) Electron Mass (rest) to Momme (mom) Electron Mass (rest) to Mace (mace) Electron Mass (rest) to Dram (apothecary/troy) (dr ap) Electron Mass (rest) to Troy Ounce (oz t) Electron Mass (rest) to Tael (tael) Electron Mass (rest) to Pound (troy/apothecary) (lb t)
Indian / South Asian (6 units)
Electron Mass (rest) to Ratti (ratti) Electron Mass (rest) to Masha (masha) Electron Mass (rest) to Tola (tola) Electron Mass (rest) to Chittack (Chatank) (chittack) Electron Mass (rest) to Seer (Ser) (seer) Electron Mass (rest) to Maund (Mann) (maund)
Scientific / Atomic (8 units)
Electron Mass (rest) to MeV/c2 (MeV/c²) Electron Mass (rest) to Muon Mass (mµ) Electron Mass (rest) to Atomic Mass Unit (u) Electron Mass (rest) to Proton Mass (mp) Electron Mass (rest) to Neutron Mass (mn) Electron Mass (rest) to Deuteron Mass (md) Electron Mass (rest) to Carbon-12 Atom Mass (C-12) Electron Mass (rest) to Planck Mass (mP)
Astronomical (4 units)
Electron Mass (rest) to Lunar Mass (Moon) (M☾) Electron Mass (rest) to Earth's Mass (M⊕) Electron Mass (rest) to Jupiter Mass (MJ) Electron Mass (rest) to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Electron Mass (rest) to Lepton (Biblical Roman) (lepton) Electron Mass (rest) to Quadrans (Biblical Roman) (quadrans) Electron Mass (rest) to Assarion (Biblical Roman) (assarion) Electron Mass (rest) to Gerah (Biblical Hebrew) (gerah) Electron Mass (rest) to Drachma (Biblical Greek) (drachma) Electron Mass (rest) to Denarius (Biblical Roman) (denarius) Electron Mass (rest) to Bekan (Biblical Hebrew) (bekah) Electron Mass (rest) to Didrachma (Biblical Greek) (didrachma) Electron Mass (rest) to Shekel (Biblical Hebrew) (shekel) Electron Mass (rest) to Tetradrachma (Biblical Greek) (tetra) Electron Mass (rest) to Mina (Biblical Greek) (mina) Electron Mass (rest) to Mina (Biblical Hebrew) (mina) Electron Mass (rest) to Talent (Biblical Greek) (talent) Electron Mass (rest) to Talent (Biblical Hebrew) (talent)
Force / Engineering (5 units)
Electron Mass (rest) to Poundal (pdl) Electron Mass (rest) to Ton (assay) (US) (AT) Electron Mass (rest) to Ton (assay) (UK) (AT) Electron Mass (rest) to Kilogram-force square second/meter (hyl) Electron Mass (rest) to Slug (slug)

Sources & references

Conversion factor (1 me = 0.0005485799 u) verified against the following authoritative sources:

Results are provided for general reference. Verify critical measurements against an authoritative standard.