Carats to Kilograms (ct → kg)
Formula
1 ct = 0.0002 kgConversion Table
| ct | kg |
|---|---|
| 0 | 0 |
| 1.0000 | 0.00020000 |
| 2.0000 | 0.00040000 |
| 3.0000 | 0.00060000 |
| 4.0000 | 0.00080000 |
| 5.0000 | 0.0010000 |
| 6.0000 | 0.0012000 |
| 7.0000 | 0.0014000 |
| 8.0000 | 0.0016000 |
| 9.0000 | 0.0018000 |
| 10.000 | 0.0020000 |
| 11.000 | 0.0022000 |
| 12.000 | 0.0024000 |
| 13.000 | 0.0026000 |
| 14.000 | 0.0028000 |
| 15.000 | 0.0030000 |
| 16.000 | 0.0032000 |
| 17.000 | 0.0034000 |
| 18.000 | 0.0036000 |
| 19.000 | 0.0038000 |
| ct | kg |
|---|---|
| 20.000 | 0.0040000 |
| 21.000 | 0.0042000 |
| 22.000 | 0.0044000 |
| 23.000 | 0.0046000 |
| 24.000 | 0.0048000 |
| 25.000 | 0.0050000 |
| 26.000 | 0.0052000 |
| 27.000 | 0.0054000 |
| 28.000 | 0.0056000 |
| 29.000 | 0.0058000 |
| 30.000 | 0.0060000 |
| 31.000 | 0.0062000 |
| 32.000 | 0.0064000 |
| 33.000 | 0.0066000 |
| 34.000 | 0.0068000 |
| 35.000 | 0.0070000 |
| 36.000 | 0.0072000 |
| 37.000 | 0.0074000 |
| 38.000 | 0.0076000 |
| 39.000 | 0.0078000 |
| ct | kg |
|---|---|
| 40.000 | 0.0080000 |
| 41.000 | 0.0082000 |
| 42.000 | 0.0084000 |
| 43.000 | 0.0086000 |
| 44.000 | 0.0088000 |
| 45.000 | 0.0090000 |
| 46.000 | 0.0092000 |
| 47.000 | 0.0094000 |
| 48.000 | 0.0096000 |
| 49.000 | 0.0098000 |
| 50.000 | 0.010000 |
| 51.000 | 0.010200 |
| 52.000 | 0.010400 |
| 53.000 | 0.010600 |
| 54.000 | 0.010800 |
| 55.000 | 0.011000 |
| 56.000 | 0.011200 |
| 57.000 | 0.011400 |
| 58.000 | 0.011600 |
| 59.000 | 0.011800 |
| ct | kg |
|---|---|
| 60.000 | 0.012000 |
| 61.000 | 0.012200 |
| 62.000 | 0.012400 |
| 63.000 | 0.012600 |
| 64.000 | 0.012800 |
| 65.000 | 0.013000 |
| 66.000 | 0.013200 |
| 67.000 | 0.013400 |
| 68.000 | 0.013600 |
| 69.000 | 0.013800 |
| 70.000 | 0.014000 |
| 71.000 | 0.014200 |
| 72.000 | 0.014400 |
| 73.000 | 0.014600 |
| 74.000 | 0.014800 |
| 75.000 | 0.015000 |
| 76.000 | 0.015200 |
| 77.000 | 0.015400 |
| 78.000 | 0.015600 |
| 79.000 | 0.015800 |
Carats to Kilograms Conversion
Converting Carats (ct) to Kilograms (kg) is a common weight conversion. 1 ct equals 0.0002 kg. For example, 100 ct is equal to 0.02 kg.
Quick Mental Math: Carats to Kilograms
Divide by approximately 5000 to convert carats to kilograms.
Why is converting Carats to Kilograms tricky?
The large non-round factor is difficult to estimate mentally.
Quick Reference Values
1 ct = 0.0002 kg. 5 ct = 0.001 kg. 10 ct = 0.002 kg. 25 ct = 0.005 kg. 50 ct = 0.01 kg. 100 ct = 0.02 kg.
What is Carats?
Carats (ct) is a unit of weight. A carat is a unit of mass equal to 200 milligrams (0.2 grams), used primarily for gemstones and pearls. It is internationally recognized and standardized by the International Bureau of Weights and Measures (BIPM) for trade and gemology. One carat equals exactly 0.2 grams according to ISO standards [bipm-si-brochure]. The carat originated from the carob seed, historically used as a reference mass. It was standardized in 1907 by the International Committee of Weights and Measures at 200 mg to ensure uniformity in gemstone trade and valuation [bipm-si-brochure]. Carats are globally used in the jewelry industry to weigh diamonds, sapphires, and other gemstones. Countries including the US, UK, Canada, and most of Europe rely on the carat for gemstone mass measurement, aligned with ISO and BIPM standards [bipm-si-brochure].
What is Kilograms?
Kilograms (kg) is a unit of weight. The kilogram is the SI base unit of mass, defined by the Planck constant fixed at exactly 6.62607015×10⁻³⁴ joule seconds. It represents the mass equal to that of the International Prototype Kilogram and is the only SI base unit still defined by a physical constant rather than a physical artifact [bipm-si-brochure]. The kilogram originated in 1795 as the mass of one liter of water at 4 °C. It was redefined in 2019 using the Planck constant to ensure long-term stability and universality, replacing the physical prototype standard maintained by the BIPM [bipm-si-brochure]. Kilograms are the primary unit of mass in nearly all countries, used in science, commerce, and industry. The SI system, adopted globally, mandates kilogram usage in trade, health, and manufacturing sectors [nist-si-guide].
Common Misspellings
People often search for this conversion using these alternate spellings: carat, karat, carrots, carret, kilo, kilogramme, kilogramm, kilograms. All of these refer to the Carats to Kilograms conversion.