Carats to Grams Converter
Convert carats to grams instantly. Type a value, change either unit, or press swap to go the other way. 1 carat = 0.2 grams.
1 carat = 0.2 grams
How to convert carats to grams
grams = carats × 0.2
To convert carats to grams, multiply the value by 0.2. To go back from grams to carats, divide by the same number (or multiply by 5).
Worked examples
- 1 ct: 1 × 0.2 = 0.2 g
- 1.5 ct: 1.5 × 0.2 = 0.3 g
- 2 ct: 2 × 0.2 = 0.4 g
One carat is 0.2 grams, so divide carats by 5. A five-carat gemstone weighs one gram.
Carats to Grams conversion table
Carats to Grams
| ct | g |
|---|---|
| 0.25 | 0.05 |
| 0.5 | 0.1 |
| 1 | 0.2 |
| 1.5 | 0.3 |
| 2 | 0.4 |
| 3 | 0.6 |
| 5 | 1 |
| 10 | 2 |
| 50 | 10 |
| 100 | 20 |
Grams to Carats
| g | ct |
|---|---|
| 0.25 | 1.25 |
| 0.5 | 2.5 |
| 1 | 5 |
| 1.5 | 7.5 |
| 2 | 10 |
| 3 | 15 |
| 5 | 25 |
| 10 | 50 |
| 50 | 250 |
| 100 | 500 |
Weight equivalents
See how one carat and one gram compare with every other weight unit on the site.
1 carat equals
| Unit | Value |
|---|---|
| milligrams (mg) | 200 |
| grams (g) | 0.2 |
| kilograms (kg) | 0.0002 |
| metric tons (tonnes) (t) | 2 × 10-7 |
| ounces (oz) | 0.007054792 |
| pounds (lb) | 0.0004409245 |
| stones (st) | 0.0000314946 |
| US tons (short tons) (ton) | 2.204623 × 10-7 |
| long tons (long ton) | 1.968413 × 10-7 |
1 gram equals
| Unit | Value |
|---|---|
| milligrams (mg) | 1,000 |
| kilograms (kg) | 0.001 |
| metric tons (tonnes) (t) | 1 × 10-6 |
| ounces (oz) | 0.03527396 |
| pounds (lb) | 0.002204623 |
| stones (st) | 0.000157473 |
| US tons (short tons) (ton) | 1.102311 × 10-6 |
| long tons (long ton) | 9.842065 × 10-7 |
| carats (ct) | 5 |
When you need to convert carats to grams
Diamonds and other gemstones are weighed in carats, but jewelers and online listings often show weights in grams as well. Converting helps you compare stones, check weight claims and calculate shipping and insurance values.
About the units
Carat (ct)
A carat is exactly 200 milligrams (0.2 grams) and is the standard unit for the weight of diamonds and other gemstones. Do not confuse it with karat, which describes the purity of gold.
Gram (g)
A gram is one thousandth of a kilogram, about the weight of a paperclip. It is the standard metric unit for food and ingredients.
Frequently asked questions
How do I convert carats to grams?
Multiply the number of carats by 0.2. For example, 10 carats × 0.2 = 2 grams.
How many grams are in one carat?
There are 0.2 grams in one carat.
How many carats are in one gram?
There are 5 carats in one gram.
Is a carat the same as a karat?
No. A carat (ct) measures the weight of a gemstone: exactly 200 milligrams. A karat (K or kt) measures the purity of gold, where 24 karat is pure gold.
Can I convert other weight units with this tool?
Yes. Use the From and To drop-downs in the converter to choose any weight unit, or press the swap button to reverse the conversion. All calculations use internationally defined conversion factors.