Carats to grams
Type a value in carats to see it in grams straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the carats box.
- Read the result in grams as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
g = ct × 0.2
Multiply the value in carats by 0.2 to get grams.
Example
To convert 25 ct to grams: 25 × 0.2 = 5 g.
Conversion table
| Carats (ct) | Grams (g) |
|---|---|
| 1 | 0.2 |
| 2 | 0.4 |
| 3 | 0.6 |
| 5 | 1 |
| 10 | 2 |
| 20 | 4 |
| 25 | 5 |
| 50 | 10 |
| 100 | 20 |
| 250 | 50 |
| 500 | 100 |
| 1,000 | 200 |
About the units
- Carat
- The metric carat for gemstones and diamonds, exactly 200 milligrams. It is unrelated to gold purity in karats.
- Gram
- One thousandth of a kilogram, the usual unit for weighing gold and food.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many grams are in one carat?
1 ct = 0.2 g exactly.
How do I convert carats to grams?
Use g = ct × 0.2. For example, 25 ct = 5 g.
How many carats are in one gram?
1 g = 5 ct.
Are mass and weight the same thing?
Strictly no: mass is the amount of matter, in kilograms, while weight is the force of gravity on it, in newtons. Scales display mass, so everyday language uses the two words interchangeably.
What is the difference between an ounce and a troy ounce?
An ordinary ounce is 28.349523125 grams and is used for food and goods, while a troy ounce is 31.1034768 grams and is used to price gold and silver.