Mass and Weight · Unit Converter

Convert Electron Mass (rest) to Carat (metric)

Convert electron mass (rest) to carats (metric) instantly. 1 electron mass (rest) = 4.554695e-27 carat (metric) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Carat (metric) 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.

Troy & Apothecary

Carat (metric)

What is a carat (metric)?

The metric carat (ct) equals exactly 200 milligrams (0.0002 kg).

Origin of the carat (metric)

From Arabic 'qirat' and Greek 'keration', the carob seed once used as a counterweight.

Where it is used

The worldwide standard for gemstone and diamond mass.

When and where it was developed

The metric carat was fixed at 200 mg internationally in 1907.

Electron Mass (rest) to Carat (metric) 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 carats (metric):

1 me = 4.554695e-27 ct
1 ct = 2.195537e+26 me

To convert electron mass (rest) to carats (metric), multiply the value in electron mass (rest) by 4.554695e-27. To reverse, multiply carats (metric) by 2.195537e+26.

How to use this converter

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

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

  1. Write down the value in electron mass (rest) (me).
  2. Multiply that value by the factor 4.554695e-27.
  3. The product is the equivalent value in carats (metric) (ct).
  4. To reverse, multiply the carat (metric) value by 2.195537e+26.

Worked examples

Example 1 — Convert 1 me to ct:
1 × 4.554695e-27 = 4.554695e-27 ct

Example 2 — Convert 100 me to ct:
100 × 4.554695e-27 = 4.554695e-25 ct

Real-world example — Sub-visible-light wavelength

500 electron mass (rest) (the green-yellow visible band) equals 0.5 carats (metric) — the canonical conversion in optics between wavelength specifications and micron-scale lens-coating thicknesses.

500 me × 4.554695e-27 = 2.277347e-24 ct

Real-world example — Spanning sub-micron to micron scale

Crossing from electron mass (rest) to carats (metric) is the everyday workflow of microscopy and semiconductor engineering — a measurement of 1000 electron mass (rest) translates to a much more compact value in carats (metric) that fits the scale of biological cells and process nodes.

1000 me × 4.554695e-27 = 4.554695e-24 ct

Electron Mass (rest) to Carat (metric) conversion table

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

Electron Mass (rest) [me]Carat (metric) [ct]
0.014.554695e-29
0.14.554695e-28
14.554695e-27
29.10939e-27
31.366408e-26
41.821878e-26
52.277347e-26
104.554695e-26
209.10939e-26
301.366408e-25
401.821878e-25
502.277347e-25
1004.554695e-25
5002.277347e-24
10004.554695e-24

Frequently asked questions

How many carats (metric) is 1 electron mass (rest)?
1 electron mass (rest) equals 4.554695e-27 carat (metric).
How do I convert electron mass (rest) to carats (metric)?
Multiply the value in electron mass (rest) by 4.554695e-27 to get carats (metric).
How do I convert carats (metric) back to electron mass (rest)?
Multiply the value in carats (metric) by 2.195537e+26, or use the Carat (metric) to Electron Mass (rest) converter.
How many carats (metric) is 100 electron mass (rest)?
100 electron mass (rest) equals 4.554695e-25 carats (metric), because 100 × 4.554695e-27 = 4.554695e-25.

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 = 4.554695e-27 ct) verified against the following authoritative sources:

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