Carats to Kilograms Converter

Convert carats to kilograms instantly.

Common weight units

Carat (ct)

Definition: A carat (symbol: ct) is a unit of mass equal to exactly 200 milligrams, or 0.2 grams. It is primarily used for gemstones and pearls.

History/origin: The carat originated from the carob seed, which was historically used as a rough standard for weighing gemstones because of its relatively uniform size. The metric carat was standardized in the early 20th century.

Current use: Carats are used almost exclusively in jewellery and gem trading to describe the weight of diamonds and other precious stones.

Kilogram (kg)

Definition: The kilogram is the SI base unit for mass. Its current definition is tied to the fixed Planck constant rather than a stored metal artifact.

History/origin: The kilogram moved from a water-based definition to an international prototype cylinder, then to a constant-based standard that laboratories can reproduce.

Current use: Kg is used for body weight, groceries, shipping, luggage limits, gym weights, scientific measurements, industrial goods, medical records, and most metric commerce.

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