Mass and Weight · Unit Converter

Convert Carat (metric) to MeV/c2

Convert carats (metric) to mev/c2 instantly. 1 carat (metric) = 1.121918e+26 mev/c2 — use the live calculator, the exact formula, a conversion table and worked examples. Also check the MeV/c2 to Carat (metric) 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 June 10, 2026 Last reviewed June 10, 2026 Updated June 10, 2026

Units explained

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.

Scientific / Atomic

MeV/c2

What is a mev/c2?

MeV/c^2 expresses mass through mass-energy equivalence, E = mc^2; 1 MeV/c^2 is about 1.783E-30 kg.

Origin of the mev/c2

Derived from Einstein's mass-energy relation, convenient for particle masses.

Where it is used

Particle physics, where masses are stated in MeV/c^2 or GeV/c^2.

When and where it was developed

Came into use with relativistic particle physics in the 20th century.

Carat (metric) to MeV/c2 conversion formula

The relationship between carats (metric) and mev/c2:

1 ct = 1.121918e+26 MeV/c²

1 MeV/c² = 8.91331e-27 ct

To convert carats (metric) to mev/c2, multiply the value in carats (metric) by 1.121918e+26. To reverse, multiply mev/c2 by 8.91331e-27.

How to use this converter

Type a value into the calculator. The result in mev/c2 updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the MeV/c2 to Carat (metric) converter for the reverse direction.

Step-by-step: convert carats (metric) to mev/c2

Write down the value in carats (metric) (ct).
Multiply that value by the factor 1.121918e+26.
The product is the equivalent value in mev/c2 (MeV/c²).
To reverse, multiply the mev/c2 value by 8.91331e-27.

Worked examples

Example 1 — Convert 1 ct to MeV/c²:
1 × 1.121918e+26 = 1.121918e+26 MeV/c²

Example 2 — Convert 100 ct to MeV/c²:
100 × 1.121918e+26 = 1.121918e+28 MeV/c²

Real-world example — Infrared to visible-spectrum mapping

A 10-carat (metric) thermal infrared wavelength corresponds to a much larger number in mev/c2, the unit favoured for ultraviolet and visible-light specifications.

10 ct × 1.121918e+26 = 1.121918e+27 MeV/c²

Real-world example — Mid-micron to nanometer

3 carats (metric) equals 3,000 mev/c2 — useful when relating mid-infrared wavelengths (typically quoted in microns) to nanometer-scale visible-light wavelength tables.

3 ct × 1.121918e+26 = 3.365753e+26 MeV/c²

Real-world example — From microns to sub-micron features

One carat (metric) equals one thousand mev/c2 — the conversion semiconductor designers do constantly when comparing mask feature dimensions to actual transistor gate lengths.

1 ct × 1.121918e+26 = 1.121918e+26 MeV/c²

Carat (metric) to MeV/c2 conversion table

Standard reference values for converting carats (metric) to mev/c2:

Carat (metric) [ct]	MeV/c2 [MeV/c²]
0.01	1.121918e+24
0.1	1.121918e+25
1	1.121918e+26
2	2.243835e+26
3	3.365753e+26
4	4.487671e+26
5	5.609589e+26
10	1.121918e+27
20	2.243835e+27
30	3.365753e+27
40	4.487671e+27
50	5.609589e+27
100	1.121918e+28
500	5.609589e+28
1000	1.121918e+29

Frequently asked questions

How many mev/c2 is 1 carat (metric)?

1 carat (metric) equals 1.121918e+26 mev/c2.

How do I convert carats (metric) to mev/c2?

Multiply the value in carats (metric) by 1.121918e+26 to get mev/c2.

How do I convert mev/c2 back to carats (metric)?

Multiply the value in mev/c2 by 8.91331e-27, or use the MeV/c2 to Carat (metric) converter.

How many mev/c2 is 100 carats (metric)?

100 carats (metric) equals 1.121918e+28 mev/c2, because 100 × 1.121918e+26 = 1.121918e+28.

Convert Carat (metric) to other weight units

Show all Carat (metric) conversions

Metric / SI (18 units)

Avoirdupois (15 units)

Troy & Apothecary (9 units)

Carat (metric) to Point (1/100 carat) (pt) Carat (metric) to Scruple (apothecary) (s ap) Carat (metric) to Pennyweight (dwt) Carat (metric) to Momme (mom) Carat (metric) to Mace (mace) Carat (metric) to Dram (apothecary/troy) (dr ap) Carat (metric) to Troy Ounce (oz t) Carat (metric) to Tael (tael) Carat (metric) to Pound (troy/apothecary) (lb t)

Indian / South Asian (6 units)

Carat (metric) to Ratti (ratti) Carat (metric) to Masha (masha) Carat (metric) to Tola (tola) Carat (metric) to Chittack (Chatank) (chittack) Carat (metric) to Seer (Ser) (seer) Carat (metric) to Maund (Mann) (maund)

Scientific / Atomic (9 units)

Carat (metric) to Electron Mass (rest) (me) Carat (metric) to MeV/c2 (MeV/c²) Carat (metric) to Muon Mass (mµ) Carat (metric) to Atomic Mass Unit (u) Carat (metric) to Proton Mass (mp) Carat (metric) to Neutron Mass (mn) Carat (metric) to Deuteron Mass (md) Carat (metric) to Carbon-12 Atom Mass (C-12) Carat (metric) to Planck Mass (mP)

Astronomical (4 units)

Carat (metric) to Lunar Mass (Moon) (M☾) Carat (metric) to Earth's Mass (M⊕) Carat (metric) to Jupiter Mass (MJ) Carat (metric) to Sun's Mass (M☉)

Biblical / Ancient (14 units)

Carat (metric) to Lepton (Biblical Roman) (lepton) Carat (metric) to Quadrans (Biblical Roman) (quadrans) Carat (metric) to Assarion (Biblical Roman) (assarion) Carat (metric) to Gerah (Biblical Hebrew) (gerah) Carat (metric) to Drachma (Biblical Greek) (drachma) Carat (metric) to Denarius (Biblical Roman) (denarius) Carat (metric) to Bekan (Biblical Hebrew) (bekah) Carat (metric) to Didrachma (Biblical Greek) (didrachma) Carat (metric) to Shekel (Biblical Hebrew) (shekel) Carat (metric) to Tetradrachma (Biblical Greek) (tetra) Carat (metric) to Mina (Biblical Greek) (mina) Carat (metric) to Mina (Biblical Hebrew) (mina) Carat (metric) to Talent (Biblical Greek) (talent) Carat (metric) to Talent (Biblical Hebrew) (talent)

Force / Engineering (5 units)

Carat (metric) to Poundal (pdl) Carat (metric) to Ton (assay) (US) (AT) Carat (metric) to Ton (assay) (UK) (AT) Carat (metric) to Kilogram-force square second/meter (hyl) Carat (metric) to Slug (slug)

Sources & references

Conversion factor (1 ct = 1.121918e+26 MeV/c²) verified against the following authoritative sources:

BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.

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