Mass and Weight · Unit Converter

Convert Electron Mass (rest) to Kilogram

Convert electron mass (rest) to kilograms instantly. 1 electron mass (rest) = 9.10939e-31 kilogram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Kilogram 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.

Metric / SI

Kilogram

What is a kilogram?

The kilogram (kg) is the SI base unit of mass, defined by fixing the Planck constant h at 6.62607015E-34 J s.

Origin of the kilogram

From Greek 'khilioi' (thousand) plus 'gramma' (small weight).

Where it is used

The worldwide base unit of mass in science, commerce, and everyday life.

When and where it was developed

Adopted in 1795; redefined through the Planck constant on 20 May 2019.

Electron Mass (rest) to Kilogram 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 kilograms:

1 me = 9.10939e-31 kg
1 kg = 1.097768e+30 me

To convert electron mass (rest) to kilograms, multiply the value in electron mass (rest) by 9.10939e-31. To reverse, multiply kilograms by 1.097768e+30.

How to use this converter

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

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

  1. Write down the value in electron mass (rest) (me).
  2. Multiply that value by the factor 9.10939e-31.
  3. The product is the equivalent value in kilograms (kg).
  4. To reverse, multiply the kilogram value by 1.097768e+30.

Worked examples

Example 1 — Convert 1 me to kg:
1 × 9.10939e-31 = 9.10939e-31 kg

Example 2 — Convert 100 me to kg:
100 × 9.10939e-31 = 9.10939e-29 kg

Real-world example — Bridging nine orders of magnitude

500 million electron mass (rest) equals a value comfortably in the human-scale kilograms range. Physics problems that span this gap are common when comparing the wavelength of light to the path length of an experiment.

5e+8 me × 9.10939e-31 = 4.554695e-22 kg

Real-world example — From sub-micron to human scale

One billion electron mass (rest) equals one kilogram — the conversion that drives home the gulf between atomic-scale features and everyday objects in physics curricula.

1e+9 me × 9.10939e-31 = 9.10939e-22 kg

Electron Mass (rest) to Kilogram conversion table

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

Electron Mass (rest) [me]Kilogram [kg]
0.019.10939e-33
0.19.10939e-32
19.10939e-31
21.821878e-30
32.732817e-30
43.643756e-30
54.554695e-30
109.10939e-30
201.821878e-29
302.732817e-29
403.643756e-29
504.554695e-29
1009.10939e-29
5004.554695e-28
10009.10939e-28

Frequently asked questions

How many kilograms is 1 electron mass (rest)?
1 electron mass (rest) equals 9.10939e-31 kilogram.
How do I convert electron mass (rest) to kilograms?
Multiply the value in electron mass (rest) by 9.10939e-31 to get kilograms.
How do I convert kilograms back to electron mass (rest)?
Multiply the value in kilograms by 1.097768e+30, or use the Kilogram to Electron Mass (rest) converter.
How many kilograms is 100 electron mass (rest)?
100 electron mass (rest) equals 9.10939e-29 kilograms, because 100 × 9.10939e-31 = 9.10939e-29.

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 = 9.10939e-31 kg) verified against the following authoritative sources:

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