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carat (metric)
 Symbol: ct. Category: Mass SI Equivalent: 2×10-4 kg Dimension: M System: INT Notes Metric unit of mass employed in the jewelry industry for weighing precious metals and precious stones. Carat is derived from the Sanskrit word 'quirrat', the seeds of the carob tree which were used to weigh precious metals due to their small sizes and uniformity in weight. 1 carat (metric) = 200 mg
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1 ct. =
 Mass Symbol Unit Name 1.20443×1023 u, uma, Da(12C), AMU atomic unit of mass (12C) 1.20481×1023 u, uma, Da(16O), AMU atomic unit of mass (16O) 1.19508×1023 u, uma, Da(1H), AMU atomic unit of mass (1H) 0.974673 ct (troy) carat (troy) 1.20443×1023 u, uma, Da dalton (atomic unit of mass) 1.37044×10-5 slug geepound (slug) 3.08647 gr (avdp.), gr (av.) grain (avoirdupois) 3.08647 gr (troy) grain (troy) 0.2 g gram 2×10-4 kg kilogram 4.40925×10-7 kip kilopound (kip) 200 mg milligram 7.0548×10-3 oz (advp.), oz (av.) ounce (avoirdupois) 6.43014×10-3 oz (troy) ounce (troy) 4.40925×10-4 lb pound 5.35845×10-4 lb (troy), lb (tr.) pound (troy) 1.37044×10-5 slug (geepound) 2×10-7 ton (metric) 1.96841×10-7 UK ton, lg ton ton (UK, long) 2.20462×10-7 ton (US, short)
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