Carats to Grams (ct → g)
Formula
1 ct = 0.2 gConversion Table
| ct | g |
|---|---|
| 0 | 0 |
| 1.0000 | 0.20000 |
| 2.0000 | 0.40000 |
| 3.0000 | 0.60000 |
| 4.0000 | 0.80000 |
| 5.0000 | 1.0000 |
| 6.0000 | 1.2000 |
| 7.0000 | 1.4000 |
| 8.0000 | 1.6000 |
| 9.0000 | 1.8000 |
| 10.000 | 2.0000 |
| 11.000 | 2.2000 |
| 12.000 | 2.4000 |
| 13.000 | 2.6000 |
| 14.000 | 2.8000 |
| 15.000 | 3.0000 |
| 16.000 | 3.2000 |
| 17.000 | 3.4000 |
| 18.000 | 3.6000 |
| 19.000 | 3.8000 |
| ct | g |
|---|---|
| 20.000 | 4.0000 |
| 21.000 | 4.2000 |
| 22.000 | 4.4000 |
| 23.000 | 4.6000 |
| 24.000 | 4.8000 |
| 25.000 | 5.0000 |
| 26.000 | 5.2000 |
| 27.000 | 5.4000 |
| 28.000 | 5.6000 |
| 29.000 | 5.8000 |
| 30.000 | 6.0000 |
| 31.000 | 6.2000 |
| 32.000 | 6.4000 |
| 33.000 | 6.6000 |
| 34.000 | 6.8000 |
| 35.000 | 7.0000 |
| 36.000 | 7.2000 |
| 37.000 | 7.4000 |
| 38.000 | 7.6000 |
| 39.000 | 7.8000 |
| ct | g |
|---|---|
| 40.000 | 8.0000 |
| 41.000 | 8.2000 |
| 42.000 | 8.4000 |
| 43.000 | 8.6000 |
| 44.000 | 8.8000 |
| 45.000 | 9.0000 |
| 46.000 | 9.2000 |
| 47.000 | 9.4000 |
| 48.000 | 9.6000 |
| 49.000 | 9.8000 |
| 50.000 | 10.000 |
| 51.000 | 10.200 |
| 52.000 | 10.400 |
| 53.000 | 10.600 |
| 54.000 | 10.800 |
| 55.000 | 11.000 |
| 56.000 | 11.200 |
| 57.000 | 11.400 |
| 58.000 | 11.600 |
| 59.000 | 11.800 |
| ct | g |
|---|---|
| 60.000 | 12.000 |
| 61.000 | 12.200 |
| 62.000 | 12.400 |
| 63.000 | 12.600 |
| 64.000 | 12.800 |
| 65.000 | 13.000 |
| 66.000 | 13.200 |
| 67.000 | 13.400 |
| 68.000 | 13.600 |
| 69.000 | 13.800 |
| 70.000 | 14.000 |
| 71.000 | 14.200 |
| 72.000 | 14.400 |
| 73.000 | 14.600 |
| 74.000 | 14.800 |
| 75.000 | 15.000 |
| 76.000 | 15.200 |
| 77.000 | 15.400 |
| 78.000 | 15.600 |
| 79.000 | 15.800 |
Carats to Grams Conversion
Converting Carats (ct) to Grams (g) is a common weight conversion. 1 ct equals 0.2 g. For example, 100 ct is equal to 20 g.
Quick Mental Math: Carats to Grams
Multiply by approximately 0.200 to convert carats to grams.
Why is converting Carats to Grams tricky?
The decimal factor is difficult to visualize.
Quick Reference Values
1 ct = 0.2 g. 5 ct = 1 g. 10 ct = 2 g. 25 ct = 5 g. 50 ct = 10 g. 100 ct = 20 g.
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 Grams?
Grams (g) is a unit of weight. The gram is a metric unit of mass equal to one thousandth of a kilogram, the SI base unit for mass. Precisely, 1 gram equals 0.001 kilograms. It is widely used for scientific, culinary, and commercial measurements due to its convenience in expressing small to moderate masses [bipm-si-brochure]. The gram was originally defined in France in 1795 as the mass of one cubic centimeter of water at 4 °C. The modern definition links it directly to the kilogram, standardized by the International Committee for Weights and Measures in the 19th century to unify metric mass units [bipm-si-brochure]. The gram is universally used worldwide, especially in medicine, food production, and chemistry. It is the preferred unit in countries using the metric system and is endorsed by international standards such as the SI and ISO 80000 [bipm-si-brochure, iso-80000].
Common Misspellings
People often search for this conversion using these alternate spellings: carat, karat, carrots, carret, gram, grams, gramm, gramms, garm. All of these refer to the Carats to Grams conversion.