Carats to Grams
Type a value in Carats and get the result in Grams, calculated exactly.
1 Carats = 0.2 Grams
Precision
Exact factorThis result is exact.
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Formula
g = ct × 0.2
To convert Carats to Grams, multiply the value by 0.2.
Worked examples
- 1 ct × 0.2 = 0.2 g
- 100 ct × 0.2 = 20 g
- 50 ct × 0.2 = 10 g
This factor is exact by definition.
Conversion table
| Carats (ct) | Grams (g) |
|---|---|
| 1 | 0.2 |
| 2 | 0.4 |
| 3 | 0.6 |
| 4 | 0.8 |
| 5 | 1 |
| 6 | 1.2 |
| 7 | 1.4 |
| 8 | 1.6 |
| 9 | 1.8 |
| 10 | 2 |
| 15 | 3 |
| 20 | 4 |
| 25 | 5 |
| 30 | 6 |
| 40 | 8 |
| 50 | 10 |
| 60 | 12 |
| 70 | 14 |
| 75 | 15 |
| 80 | 16 |
| 90 | 18 |
| 100 | 20 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Grams to Carats
| Grams (g) | Carats (ct) |
|---|---|
| 1 | 5 |
| 2 | 10 |
| 3 | 15 |
| 4 | 20 |
| 5 | 25 |
| 6 | 30 |
| 7 | 35 |
| 8 | 40 |
| 9 | 45 |
| 10 | 50 |
| 15 | 75 |
| 20 | 100 |
| 25 | 125 |
| 30 | 150 |
| 40 | 200 |
| 50 | 250 |
| 60 | 300 |
| 70 | 350 |
| 75 | 375 |
| 80 | 400 |
| 90 | 450 |
| 100 | 500 |
Unit definitions
- Carats ct
- The metric carat for gemstones: exactly 200 milligrams.
- Grams g
- One thousandth of a kilogram.
Questions people ask
Carats to Grams: what is the conversion factor?
One ct is 0.2 g.
How do I convert Carats to Grams?
Use the formula above. For example, 100 ct = 20 g.
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.