Carats to Kilograms Converter
Enter the weight in carats below to convert it to kilograms.
Convert Carats to Kilograms
Enter a value in carats (ct) to convert to kilograms (kg).
Metric Carat to Kilogram Conversion Table
Table showing various metric carat measurements converted to kilograms. Click any preset value or arrow to load it into the converter.
How to Convert Carats to Kilograms
To convert carats to kilograms, multiply the weight by the following conversion ratio: 0.0002 kilograms/metric carat.
Since one metric carat is equal to 0.0002 kilograms, you can use this simple formula to convert:
The weight in kilograms is equal to the weight in carats multiplied by 0.0002.
For example, here's how to convert 5 carats to kilograms using the formula above.
How Many Kilograms Are in a Metric Carat?
There are 0.0002 kilograms in a metric carat, which is why we use this value in the formula above.
Our metric carat to kilogram calculator automatically converts your weight measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Carats and kilograms are both units used to measure weight. Keep reading to learn more about each unit.
What Is a Metric Carat?
A metric carat is a unit of weight equal to 1/5,000 of a kilogram (0.0002 kg). Gemstone mass unit equal to 0.2 grams (200 mg). [1]
The metric carat is classified as a metric and SI-compatible unit of weight. Carats can be abbreviated as ct; for example, 1 metric carat can be written as 1 ct.
When working with carats (ct) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, carats (ct) are widely used across fine-tolerance laboratory, analytical, and micro-scale weight measurements within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Kilogram?
The fundamental SI unit of mass. It serves as a primary reference unit for measuring weight across scientific and practical applications. [2]
The kilogram is classified as an International System of Units (SI) unit of weight. Kilograms can be abbreviated as kg; for example, 1 kilogram can be written as 1 kg.
Although the name "kilogram" begins with the SI prefix "kilo" (1,000 grams), the kilogram (kg) is the sole SI base unit whose definition includes a prefix for historical reasons established by the BIPM.
In practice, kilograms (kg) are widely used across standard weight applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
When converting weight between carats (ct) and kilograms (kg), keep full floating-point precision (1 ct = 0.0002 kg; 1 kg = 5,000 ct) during intermediate calculations and round only the final kilogram figure to match your instrument tolerance.
More Carat & Kilogram Conversions
Need to calculate in the opposite direction? Use our kilograms to carats calculator to switch your starting unit immediately. You can also explore related tools such as converting kilograms to carats, converting pounds to kilograms, or converting grams to kilograms.
Convert from Carats
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Mass)·Mass & Weight Metrology Standard — Carats (ct) to Kilograms (kg)
- [2]NIST HB 44 SpecificationNIST HB 44 (NIST Handbook 44 (Current Ed.))·Unit Specifications: Metric Carat (ct) & Kilogram (kg)
- [3]BIPM ReferenceBIPM (SI Base Unit: Kilogram (kg))·Conversion Factors & Mathematical Basis (ct to kg)