Convert carat [car,ct] to ton (assay) (US) [AT (US)] Online | Free weight-and-mass Converter

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Carat [car, ct]


The carat is a unit of mass used primarily for measuring gemstones and pearls.



  • 1 carat = 200 milligrams



  • 1 carat = 0.2 grams



  • Symbol: ct or sometimes car



  • Subdivided into 100 points, so a 0.25 carat gem is 25 points.



Key Facts:



  • 1 ct = 0.2 g = 200 mg



  • Standardized internationally since 1907



  • Commonly used for diamonds, gemstones, and pearls



  • Not to be confused with karat, which measures gold purity



The carat provides a precise and standardized way to describe the weight of precious stones in the jewelry industry.



Ton (Assay) (US) [AT (US)]


The assay ton (AT) is a specialized unit of weight used in the mining and precious metals industries in the United States. It is primarily used to measure ore quantities for assaying, which is the process of analyzing the metal content of ore samples.


One assay ton equals 29.1667 pounds (about 13.23 kilograms), which is different from the standard short ton (2,000 pounds). This smaller ton unit allows for more precise measurements in evaluating the value of ore deposits.


The assay ton helps miners and metallurgists accurately calculate the concentration of valuable metals like gold and silver in ores.



Popular Weight-and-mass Unit Conversions

Convert carat [car,ct] to Other Weight-and-mass Units

carat [car,ct] to kilogram kg
carat [car,ct] to gram [g]
carat [car,ct] to milligram [mg]
carat [car,ct] to ton (metric) [t]
carat [car,ct] to pound
carat [car,ct] to ounce [oz]
carat [car,ct] to ton (short) [ton (US)]
carat [car,ct] to ton (long) [ton (UK)]
carat [car,ct] to Atomic mass unit [u]
carat [car,ct] to exagram [Eg]
carat [car,ct] to petagram [Pg]
carat [car,ct] to teragram [Tg]
carat [car,ct] to gigagram [Gg]
carat [car,ct] to megagram [Mg]
carat [car,ct] to hectogram [hg]
carat [car,ct] to dekagram [dag]
carat [car,ct] to decigram [dg]
carat [car,ct] to centigram [cg]
carat [car,ct] to microgram [µg]
carat [car,ct] to nanogram [ng]
carat [car,ct] to picogram [pg]
carat [car,ct] to femtogram [fg]
carat [car,ct] to attogram [ag]
carat [car,ct] to dalton
carat [car,ct] to kilogram-force square second/meter
carat [car,ct] to kilopound [kip]
carat [car,ct] to kip
carat [car,ct] to slug
carat [car,ct] to pound-force square second/foot
carat [car,ct] to pound (troy or apothecary)
carat [car,ct] to poundal [pdl]
carat [car,ct] to ton (assay) (US) [AT (US)]
carat [car,ct] to ton (assay) (UK) [AT (UK)]
carat [car,ct] to kiloton (metric) [kt]
carat [car,ct] to quintal (metric) [cwt]
carat [car,ct] to hundredweight (US)
carat [car,ct] to hundredweight (UK)
carat [car,ct] to quarter (US) [qr (US)]
carat [car,ct] to quarter (UK) [qr (UK)]
carat [car,ct] to stone (US)
carat [car,ct] to stone (UK)
carat [car,ct] to tonne [t]
carat [car,ct] to pennyweight [pwt]
carat [car,ct] to scruple (apothecary) [s.ap]
carat [car,ct] to grain [gr]
carat [car,ct] to gamma
carat [car,ct] to talent (Biblical Hebrew)
carat [car,ct] to mina (Biblical Hebrew)
carat [car,ct] to shekel (Biblical Hebrew)
carat [car,ct] to bekan (Biblical Hebrew)
carat [car,ct] to gerah (Biblical Hebrew)
carat [car,ct] to talent (Biblical Greek)
carat [car,ct] to mina (Biblical Greek)
carat [car,ct] to tetradrachma (Biblical Greek)
carat [car,ct] to didrachma (Biblical Greek)
carat [car,ct] to drachma (Biblical Greek)
carat [car,ct] to denarius (Biblical Roman)
carat [car,ct] to assarion (Biblical Roman)
carat [car,ct] to quadrans (Biblical Roman)
carat [car,ct] to lepton (Biblical Roman)
carat [car,ct] to Planck mass
carat [car,ct] to Electron mass (rest)
carat [car,ct] to Muon mass
carat [car,ct] to Proton mass
carat [car,ct] to Neutron mass
carat [car,ct] to Deuteron mass
carat [car,ct] to Earths mass
carat [car,ct] to Suns mass