Convert Carat to Gram
Use this free converter to change carats (ct) into grams (g). Carat and gram both measure weight & mass. As a quick reference, 1 ct equals 0.2 g, and 1 g equals 5 ct.
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Gram (g)
0.2
1 ct = 0.2 g
Weight & Mass conversion table
| Carat | Gram |
|---|---|
| 0.01 | 0.002 |
| 0.1 | 0.02 |
| 0.5 | 0.1 |
| 1 | 0.2 |
| 2 | 0.4 |
| 3 | 0.6 |
| 5 | 1 |
| 10 | 2 |
| 20 | 4 |
| 25 | 5 |
| 50 | 10 |
| 100 | 20 |
| 1,000 | 200 |
How to convert Carat to Gram
Multiply the carat value by 0.2 to get grams.
- Enter the number of carats you want to convert.
- The converter instantly shows the equivalent value in grams.
- Worked example: 15 ct × 0.2 = 3 g.
- Use the swap button to reverse the conversion (gram 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.
Gram (g)
- Definition
- A gram (g) is one thousandth of a kilogram, a small metric unit of mass used for light objects.
- History
- Defined in the 1790s as the mass of one cubic centimeter of water at its freezing point.
- Current use
- Grams are used for food portions, nutrition labels, postage, and laboratory work worldwide.
Frequently asked questions
How many grams are in a carat?
There are 0.2 g in 1 ct. To convert, multiply the number of carats by 0.2.
How do I convert carats to grams?
Multiply the carat value by 0.2 to get grams. For example, 10 ct = 2 g.
Is this carat-to-gram 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 |