Convert Carat to Kilogram
Use this free converter to change carats (ct) into kilograms (kg). Carat and kilogram both measure weight & mass. As a quick reference, 1 ct equals 0.0002 kg, and 1 kg equals 5000 ct.
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Kilogram (kg)
0.0002
1 ct = 0.0002 kg
Weight & Mass conversion table
| Carat | Kilogram |
|---|---|
| 0.01 | 0.000002 |
| 0.1 | 0.00002 |
| 0.5 | 0.0001 |
| 1 | 0.0002 |
| 2 | 0.0004 |
| 3 | 0.0006 |
| 5 | 0.001 |
| 10 | 0.002 |
| 20 | 0.004 |
| 25 | 0.005 |
| 50 | 0.01 |
| 100 | 0.02 |
| 1,000 | 0.2 |
How to convert Carat to Kilogram
Multiply the carat value by 0.0002 to get kilograms.
- Enter the number of carats you want to convert.
- The converter instantly shows the equivalent value in kilograms.
- Worked example: 15 ct × 0.0002 = 0.003 kg.
- Use the swap button to reverse the conversion (kilogram to carat).
About these units
Carat (ct)
- Definition
- A carat (ct) is a unit of mass for gemstones equal to exactly 200 milligrams.
- History
- It takes its name from the carob seed, once used as a counterweight, and was standardised at 0.2 g in 1907.
- Current use
- Carats express the weight of diamonds and other precious stones in the jewellery trade.
Kilogram (kg)
- Definition
- The kilogram (kg) is the SI base unit of mass, defined since 2019 by fixing the value of the Planck constant.
- History
- It was originally the mass of one liter of water, then a platinum-iridium cylinder kept near Paris until the 2019 redefinition.
- Current use
- The kilogram is the global standard for weighing goods, people, and ingredients in science and commerce.
Frequently asked questions
How many kilograms are in a carat?
There are 0.0002 kg in 1 ct. To convert, multiply the number of carats by 0.0002.
How do I convert carats to kilograms?
Multiply the carat value by 0.0002 to get kilograms. For example, 10 ct = 0.002 kg.
Is this carat-to-kilogram converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Carat to other weight & mass units
| Unit | 1 Carat equals |
|---|---|
| Kilogram (kg) | 0.0002 kg |
| Gram (g) | 0.2 g |
| Milligram (mg) | 200 mg |
| Microgram (µg) | 200000 µg |
| Metric Ton (t) | 2.0000e-7 t |
| Pound (lb) | 0.00044092452 lb |
| Ounce (oz) | 0.0070547924 oz |
| Stone (st) | 0.000031494609 st |
| US Ton (ton) | 2.2046e-7 ton |
| Imperial Ton (long ton) | 1.9684e-7 long ton |