Carats to Grams Converter
Convert carats (ct) to grams (g), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter a weight, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 ct = 0.2 g
- 1 × 0.2 = 0.2 g
How to convert carats to grams
1 ct = 0.2 g, so multiply by 0.2 to go from carats to grams. Going the other way, 1 g = 5 ct.
g = ct × 0.2 ct = g × 5
Worked example:
1 ct = 0.2 g 5 × 0.2 = 1 g
Carats to grams table
| Carats | Grams |
|---|---|
| 1 ct | 0.2 g |
| 2 ct | 0.4 g |
| 3 ct | 0.6 g |
| 4 ct | 0.8 g |
| 5 ct | 1 g |
| 6 ct | 1.2 g |
| 7 ct | 1.4 g |
| 8 ct | 1.6 g |
| 9 ct | 1.8 g |
| 10 ct | 2 g |
| 15 ct | 3 g |
| 20 ct | 4 g |
| 25 ct | 5 g |
| 30 ct | 6 g |
| 40 ct | 8 g |
| 50 ct | 10 g |
| 75 ct | 15 g |
| 100 ct | 20 g |
| 250 ct | 50 g |
| 500 ct | 100 g |
| 1000 ct | 200 g |
About the units
- Carats (ct)
- Carats, a specialised unit. Metric carat, 200 mg exactly. Definition: NIST Handbook 44 (2024), Appendix C: General Tables of Units of Measurement.
- Grams (g)
- Grams, a metric unit. Definition: BIPM SI Brochure.