Grams (g) to Carats (ct) Converter
Enter a value to instantly convert between weight units.
1 Gram = 5 Carat
Key Formulas
Kilogram → Pound
lb = kg × 2.20462Pound → Kilogram
kg = lb × 0.453592Gram → Ounce
oz = g × 0.035274Ounce → Gram
g = oz × 28.3495Formula
ct = g × 5A carat is exactly 0.2 grams, so one gram equals 5 carats. This conversion is fundamental in the gemstone and jewelry industry — a 1-carat diamond weighs 0.2 grams, and a 5-gram gold pendant weighs 25 carats. Jewelers work with both units daily, converting between them for pricing, inventory, and customer specifications.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A jeweler measuring a 1 g gold setting knows it's 5 carats for the price calculation.
1 g = 5 ct
A gemstone dealer weighing a 0.5 g diamond notes it as 2.5 carats for the certificate.
0.5 g = 2.5 ct
A jewelry manufacturer ordering 10 g of small diamonds needs 50 carats for the supply order.
10 g = 50 ct
A custom jewelry order specifies a 10-ct gemstone — the 2 g weight is needed for the gold setting design.
2 g = 10 ct