Convert short tons (us) to carats instantly.
Definition: A short ton is a unit of mass used mainly in the United States and is equal to 2,000 pounds, or about 907.18474 kilograms.
History/origin: The short ton developed from the imperial and customary pound-based systems in North America, where it became standard for trade, industry, and transportation.
Current use: Short tons are used in the United States for industrial shipments, construction materials, mining, and freight calculations.
Definition: The carat is a gemstone mass unit. One ct is exactly 200 mg, which is the same as 0.2 g.
History/origin: Gem traders once used carob seeds as small weight references; modern standards replaced that practice with the fixed 200 mg metric carat.
Current use: Ct is used for diamonds, sapphires, rubies, emeralds, pearls, appraisal reports, jewelry listings, auction catalogs, and gem certification documents.
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