Convert carats to kilograms for diamond grading, jewelry making, and gemstone valuation. Accurate converter with industry standards and real-world examples.
1 carat equals 0.0002 kilogram
Formula: kg = ct × 0.000200000
The carat, equal to 0.0002 kilograms or 200 milligrams, is the standard unit for measuring precious gemstones and pearls worldwide. Understanding this conversion is essential for jewelers, gemologists, and anyone involved in the precious stones industry, where a single carat difference can represent thousands of dollars in value.
Precision in carat-to-kilogram conversion directly impacts gemstone pricing, insurance valuations, and international trade compliance. A 1-carat diamond (0.0002 kg) can cost $3,000-$15,000 depending on quality. Measurement errors of just 0.1 carats represent 5-10% price discrepancies, potentially costing thousands in transactions or insurance claims.
Diamond dealers and jewelry manufacturers use carat measurements for grading, pricing, and inventory management. International diamond trading follows the Gemological Institute of America (GIA) standards, where carat weight directly determines market value. Conversion to kilograms becomes necessary when dealing with bulk shipments, customs documentation, or international regulatory compliance.
Gemologists and appraisers use carat weight as one of the four Cs (Carat, Color, Clarity, Cut) to determine gemstone value. While carats remain the standard in the industry, metric documentation and international shipping require kilogram conversions. Appraisers must maintain accuracy to within 0.01 carats for insurance and legal documentation.
| carats | kilograms |
|---|---|
| 10 ct | 0.002 kg |
| 50 ct | 0.01 kg |
| 100 ct | 0.02 kg |
| 500 ct | 0.1 kg |
| 1000 ct | 0.2 kg |
Formula: kg = ct × conversion factor
The carat is a widely used unit for measuring weight. It is commonly used in various applications and industries worldwide.
The kilogram is a widely used unit for measuring weight. It is commonly used in various applications and industries worldwide.
This carat to kilogram converter uses high-precision conversion factors to ensure accurate results for professional and academic use.
Our calculator provides results with up to 10 decimal places for maximum accuracy.
Exactly 5,000 carats equal 1 kilogram. This is because 1 carat = 0.0002 kilograms, so the inverse calculation is 1 ÷ 0.0002 = 5,000 carats. For practical purposes, if you're working with bulk gemstone shipments, remember that 1 kg = 5,000 carats. This relationship makes metric conversions straightforward: 10 carats = 0.002 kg, 100 carats = 0.02 kg, and 1,000 carats = 0.2 kg.
The carat system originated centuries before the metric system and became deeply embedded in the gemstone industry's infrastructure, grading standards, and international trade practices. The GIA (Gemological Institute of America) and other major certification bodies use carats as the universal standard for gemstone weight, making it impossible to replace without disrupting global markets. Additionally, carats provide appropriate scale for gemstones: most diamonds range from 0.5 to 5 carats, whereas expressing them in kilograms (0.0001 to 0.001 kg) creates awkward decimal notation. The carat system also has historical prestige and market psychology—a "1-carat diamond" resonates differently than "0.0002 kilograms of carbon."
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