Convert Carats to grams
1 carat = 0.2 grams · g = ct ÷ 5
When you need this conversion
Gemstone pricing runs on carats, where one carat is exactly 0.2 grams, so the conversion establishes what a stone actually weighs. It is distinct from karat, which measures gold purity rather than weight.
Carats to grams conversion table
| Carats (ct) | Grams (g) |
|---|---|
| 1 ct | 0.2 g |
| 2 ct | 0.4 g |
| 3 ct | 0.6 g |
| 5 ct | 1 g |
| 10 ct | 2 g |
| 15 ct | 3 g |
| 20 ct | 4 g |
| 25 ct | 5 g |
| 50 ct | 10 g |
| 75 ct | 15 g |
| 100 ct | 20 g |
| 250 ct | 50 g |
| 500 ct | 100 g |
| 1,000 ct | 200 g |
The formula
g = ct ÷ 5Because both units measure weight, the conversion is a single multiplication by a fixed factor. That factor never changes, so the result is exact.
Convert the other way
Grams to carats →Related weight conversions
- Ounces to grams
- Grams to ounces
- Kilograms to pounds
- Kilograms to stones
- Metric tons to US tons
- Pounds to kilograms
- Stones to kilograms
- US tons to metric tons
- Milligrams to grams
- Kilograms to grams
- Metric tons to grams
- Pounds to grams
Frequently asked questions
- How many grams are in a carat?
- There are 0.2 grams in 1 carat. The formula is g = ct ÷ 5.
- How do you convert carats to grams?
- Use the formula g = ct ÷ 5. For example, 10 carats equals 2 grams.
- Is the carats to grams conversion exact?
- Yes. Carats and grams are both units of weight, related by an exact defined factor. Displayed results are rounded for readability.
- What is ct short for?
- ct is the standard symbol for carat. g is the symbol for gram.