Grams to Carats
Convert grams to gemstone carats for diamonds, jewelry, and gem weight estimates using the metric carat.
How to convert g to ct
To convert a value from grams (g) to carats (ct), enter the number in the converter above. Use the swap control if you need the reverse direction.
x is the source value in g; y is the result in ct.
Popular conversions
Quick answers for common g to ct values are available from the related conversion pages.
Use the related tools section for fixed-value conversions and the reverse direction.
Common conversion table
Quick reference table for common g to ct values:
| g | ct |
|---|---|
| 1 | 5 |
| 5 | 25 |
| 10 | 50 |
| 50 | 250 |
| 100 | 500 |
| 1,000 | 5,000 |
About grams
Gram (g) — One gram is one thousandth of a kilogram.
Common uses: Grams are common for recipes, nutrition labels, small parcels, lab measurements, and gemstone conversions.
About carats
Carat (ct) — One metric carat is exactly 0.2 grams. In this converter, carat means gemstone weight, not gold karat purity.
Common uses: Carats are used for diamond and gemstone weight in jewelry, gemology, grading reports, and auction listings.
Frequently Asked Questions
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