How to convert grams to carats
ct = g × 5Multiply the value in grams by 5. To go the other way, multiply by 0.2 (or divide by 5).
A gram is larger than a carat: one gram contains 5 carats.
Worked examples
- 1 gram1 g × 5 = 5 ct
- 5 grams5 g × 5 = 25 ct
- 10 grams10 g × 5 = 50 ct
- 20 grams20 g × 5 = 100 ct
- 100 grams100 g × 5 = 500 ct
Grams to carats conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Grams (g) | Carats (ct) |
|---|---|
| 0.1 g | 0.5 ct |
| 0.25 g | 1.25 ct |
| 0.5 g | 2.5 ct |
| 1 g | 5 ct |
| 2 g | 10 ct |
| 3 g | 15 ct |
| 4 g | 20 ct |
| 5 g | 25 ct |
| 6 g | 30 ct |
| 7 g | 35 ct |
| 8 g | 40 ct |
| 9 g | 45 ct |
| 10 g | 50 ct |
| Grams (g) | Carats (ct) |
|---|---|
| 12 g | 60 ct |
| 15 g | 75 ct |
| 20 g | 100 ct |
| 25 g | 125 ct |
| 30 g | 150 ct |
| 40 g | 200 ct |
| 50 g | 250 ct |
| 75 g | 375 ct |
| 100 g | 500 ct |
| 250 g | 1,250 ct |
| 500 g | 2,500 ct |
| 1,000 g | 5,000 ct |
About the units
Gram (g)
One thousandth of a kilogram. Recipes, nutrition labels and postal scales use grams; a US nickel weighs 5 g. One gram equals 0.001 kilograms (kg).
Carat (ct)
The metric carat is exactly 200 mg and is used to weigh gemstones. (Karat, a gold-purity scale, is a different thing.) One carat equals 0.0002 kilograms (kg).
Frequently asked questions
How many carats are in one gram?
There are 5 carats in one gram, and this value is exact by definition.
How do I convert grams to carats?
Multiply the number of grams by 5. For example, 10 g × 5 = 50 ct.
How many grams are in one carat?
One carat equals 0.2 grams. That is the reverse factor, 1 ÷ 5.
What is 10 grams in carats?
10 g = 50 ct.
Is this g to ct converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.