Grams to Carats Converter
Convert grams to carats instantly with our accurate online calculator. Perfect for gemstone trading, jewelry making, and precious stone measurements.
Grams to Carats Calculator
Quick Conversion Examples
Common Conversions
- 1g = 5 ct
- 0.2g = 1 ct
- 0.4g = 2 ct
- 0.6g = 3 ct
- 0.8g = 4 ct
Diamond Examples
- 0.1g = 0.5 ct
- 0.2g = 1 ct
- 0.4g = 2 ct
- 0.6g = 3 ct
- 1g = 5 ct
Gemstone Examples
- 0.02g = 0.1 ct
- 0.1g = 0.5 ct
- 0.2g = 1 ct
- 0.4g = 2 ct
- 0.6g = 3 ct
Grams to Carats Conversion Table
| Grams (g) | Carats (ct) | Common Use |
|---|---|---|
| 0.001 | 0.005000 | Common weight |
| 0.01 | 0.050000 | Common weight |
| 0.1 | 0.500000 | Common weight |
| 0.5 | 2.500000 | Common weight |
| 1 | 5.000000 | Common weight |
| 2 | 10.000000 | Common weight |
| 5 | 25.000000 | Common weight |
| 10 | 50.000000 | Common weight |
| 20 | 100.000000 | Common weight |
| 50 | 250.000000 | Common weight |
| 100 | 500.000000 | Common weight |
| 200 | 1000.000000 | Common weight |
| 500 | 2500.000000 | Common weight |
| 1000 | 5000.000000 | Common weight |
Real-World Applications
💎 Jewelry & Gemstone Industry
Essential for jewelry design, gemstone trading, and precious stone valuation in the jewelry industry.
- Jewelry design and manufacturing
- Gemstone trading and valuation
- Diamond certification
- Jewelry appraisals
ðŸÂª Retail & E-commerce
Critical for online jewelry sales, product listings, and customer education about gemstone weights.
- Online jewelry listings
- Product specifications
- Customer education
- Price calculations
ðŸâ€Â¬ Gemological Research
Important for gemological studies, stone identification, and scientific research on precious stones.
- Gemological analysis
- Stone identification
- Research studies
- Quality assessment
💰 Investment & Trading
Vital for precious stone investments, trading decisions, and portfolio management.
- Investment analysis
- Trading decisions
- Portfolio management
- Market valuations
Frequently Asked Questions
How many carats are in a gram?
There are exactly 5 carats in 1 gram. This is the standard conversion used in the gemstone and jewelry industry worldwide.
Why is the conversion factor 5?
The carat is defined as exactly 200 milligrams (0.2 grams). Since 1 gram = 1000 milligrams, and 1000 ÷ 200 = 5, there are 5 carats in 1 gram.
Is this calculator accurate for jewelry work?
Yes, our calculator provides precision to 6 decimal places, making it suitable for professional jewelry work, gemstone trading, and any application requiring carat precision.
What's the difference between carats and karats?
Carats (ct) measure gemstone weight, while karats (k) measure gold purity. 1 carat = 0.2 grams, while 24 karats = 100% pure gold.
Can I use this for diamond trading?
Absolutely! This calculator is perfect for diamond trading, jewelry manufacturing, and any gemstone-related business requiring accurate carat conversions.
How precise is the conversion?
Our calculator provides precision to 6 decimal places, which is more than sufficient for professional jewelry work, gemstone trading, and investment applications.
Mathematical Background
Conversion Formula
The conversion from grams to carats is based on the international definition of the carat. One carat is defined as exactly 200 milligrams (0.2 grams).
Historical Context
The carat has been used as a unit of weight for gemstones since ancient times. The modern metric carat was standardized in 1907 at the Fourth General Conference on Weights and Measures, where it was defined as exactly 200 milligrams.
International Standards
The carat is recognized internationally and is used by:
- Gemological Institute of America (GIA)
- International Gemological Institute (IGI)
- American Gem Society (AGS)
- All major jewelry and gemstone organizations
Precision Considerations
For professional jewelry work, carat measurements are typically expressed to two decimal places (e.g., 1.25 ct). Our calculator provides 6 decimal places for maximum precision in all applications.