Mass and Weight · Unit Converter

Convert Carat (metric) to Ounce

Convert carats (metric) to ounces instantly. 1 carat (metric) = 0.0070547924 ounce — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Ounce 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 Last reviewed Updated

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.

Avoirdupois

Ounce

What is a ounce?

The (avoirdupois) ounce (oz) equals one-sixteenth of a pound, about 28.35 grams.

Origin of the ounce

From Latin 'uncia', meaning a twelfth part.

Where it is used

US food portions, postal weights, and boxing weight classes.

When and where it was developed

Standardized as 1/16 of the international pound from 1959.

Carat (metric) to Ounce conversion formula

The relationship between carats (metric) and ounces:

1 ct = 0.0070547924 oz
1 oz = 141.7476155 ct

To convert carats (metric) to ounces, multiply the value in carats (metric) by 0.0070547924. To reverse, multiply ounces by 141.7476155.

How to use this converter

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

Step-by-step: convert carats (metric) to ounces

  1. Write down the value in carats (metric) (ct).
  2. Multiply that value by the factor 0.0070547924.
  3. The product is the equivalent value in ounces (oz).
  4. To reverse, multiply the ounce value by 141.7476155.

Worked examples

Example 1 — Convert 1 ct to oz:
1 × 0.0070547924 = 0.0070547924 oz

Example 2 — Convert 100 ct to oz:
100 × 0.0070547924 = 0.7054792396 oz

Real-world example — Plastic film and laminate thickness

A 500-carat (metric) sheet is a typical spec for ID-card laminates and film overlays. Converting to ounces aligns the value with the unit most CAD systems and material datasheets prefer.

500 ct × 0.0070547924 = 3.5273961981 oz

Real-world example — Packaging gauge

A 4-carat (metric) plastic bag thickness is a common spec for grocery and freezer bags. Converting from carats (metric) to ounces is what packaging buyers do whenever they bridge US and metric supplier quotes.

4 ct × 0.0070547924 = 0.0282191696 oz

Carat (metric) to Ounce conversion table

Standard reference values for converting carats (metric) to ounces:

Carat (metric) [ct]Ounce [oz]
0.017.054792e-5
0.10.0007054792
10.0070547924
20.0141095848
30.0211643772
40.0282191696
50.035273962
100.070547924
200.1410958479
300.2116437719
400.2821916958
500.3527396198
1000.7054792396
5003.5273961981
10007.0547923961

Frequently asked questions

How many ounces is 1 carat (metric)?
1 carat (metric) equals 0.0070547924 ounce.
How do I convert carats (metric) to ounces?
Multiply the value in carats (metric) by 0.0070547924 to get ounces.
How do I convert ounces back to carats (metric)?
Multiply the value in ounces by 141.7476155, or use the Ounce to Carat (metric) converter.
How many ounces is 100 carats (metric)?
100 carats (metric) equals 0.7054792396 ounces, because 100 × 0.0070547924 = 0.7054792396.

Convert Carat (metric) to other weight units

Show all Carat (metric) conversions
Metric / SI (18 units)
Carat (metric) to Attogram (ag) Carat (metric) to Femtogram (fg) Carat (metric) to Picogram (pg) Carat (metric) to Nanogram (ng) Carat (metric) to Microgram (µg) Carat (metric) to Milligram (mg) Carat (metric) to Centigram (cg) Carat (metric) to Decigram (dg) Carat (metric) to Gram (g) Carat (metric) to Dekagram (dag) Carat (metric) to Hectogram (hg) Carat (metric) to Kilogram (kg) Carat (metric) to Quintal (metric) (q) Carat (metric) to Metric Ton (t) Carat (metric) to Gigagram (Gg) Carat (metric) to Teragram (Tg) Carat (metric) to Petagram (Pg) Carat (metric) to Exagram (Eg)
Avoirdupois (15 units)
Carat (metric) to Grain (gr) Carat (metric) to Dram (avoirdupois) (dr) Carat (metric) to Ounce (oz) Carat (metric) to Pound (lb) Carat (metric) to Clove (clove) Carat (metric) to Stone (US) (st) Carat (metric) to Stone (UK) (st) Carat (metric) to Quarter (US) (qr) Carat (metric) to Quarter (UK) (qr) Carat (metric) to Hundredweight (US) (cwt) Carat (metric) to Hundredweight (UK) (cwt) Carat (metric) to Wey (wey) Carat (metric) to Kilopound (kip) (kip) Carat (metric) to Ton (short, US) (sh tn) Carat (metric) to Ton (long, UK) (long tn)
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 = 0.0070547924 oz) verified against the following authoritative sources:

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