Carats to Grams
Convert ct to g quickly with this free online calculator. The page explains the conversion rule, gives practical examples and provides a quick reference table.
ADVERTISEMENT
CONVERTED RESULT—
Decimal places
CONVERSION RULE
1 metric carat equals 0.2 grams.
How to use the Carats to Grams
- Enter the number you want to convert.
- Confirm the source unit shown beside the input.
- Choose decimal precision if you need more or less detail.
- Read the converted result.
- Copy the result when you need to use it elsewhere.
How the conversion works
1 metric carat equals 0.2 grams.
For a simple fixed-factor conversion, the calculator multiplies the entered value by the stated factor. Temperature scales and certain specialized tools use their specific mathematical relationship instead.
ADVERTISEMENT
Common ct to g conversions
| ct | g |
|---|---|
| 1 ct | 0.2 g |
| 2 ct | 0.4 g |
| 5 ct | 1 g |
| 10 ct | 2 g |
| 20 ct | 4 g |
| 50 ct | 10 g |
Example
For example, entering 1 ct gives approximately 0.2 g using the rule above. Change the input to test your own value.
Frequently asked questions
The Carats to Grams converts a value from ct to g using the conversion relationship described on this page.
Enter your value, review the source and destination units, choose the decimal precision and read or copy the result.
1 metric carat equals 0.2 grams.
Use enough precision for your purpose. Everyday estimates usually need fewer decimal places; technical work may require more.
It can be a useful reference calculation, but safety-critical, regulated, contractual or specialized work should be verified against the applicable authoritative standard.
Accuracy note: This calculator is a practical reference. For regulated, safety-critical or specialized work, verify the result against the applicable standard.
Page reviewed: August 24, 2026.