Carats to Grams Converter
Convert carats (ct) to grams (g) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
Carats to Grams formula
g = ct × 0.2
1 carat = 0.2 grams · 1 gram = 5 carats
To convert carats to grams, multiply the value by 0.2. For example, 1 ct:
g = 1 × 0.2g = 0.2
So 1 ct = 0.2 g.
Mental math shortcut
This conversion is exact, so there is no need to estimate: just multiply by 0.2.
Carats to Grams conversion table
Grams back to Carats
The same values converted the other way, rounded for everyday use:
| Grams | Carats |
|---|---|
| 0.05 g | 0.25 ct |
| 0.1 g | 0.5 ct |
| 0.15 g | 0.75 ct |
| 0.2 g | 1 ct |
| 0.3 g | 1.5 ct |
| 0.4 g | 2 ct |
| 0.6 g | 3 ct |
| 1 g | 5 ct |
About the units
Carats (ct)
A metric carat is exactly 200 milligrams (0.2 g). It is the standard unit of weight for diamonds and gemstones.
Grams (g)
A gram is one thousandth of a kilogram. It is the standard metric unit for food, ingredients and small weights.
Frequently asked questions
How many grams are in a carat?
One carat equals 0.2 grams.
What is 1 Carats in Grams?
1 ct = 0.2 g.
How do I convert Grams back to Carats?
Divide the grams by 0.2.