Gemstones are traditionally weighed in units like ratti and carat, and understanding how to convert between them is important for jewelers, gem traders, and buyers alike.
What is a Ratti?
Ratti is a traditional Indian unit of mass used for weighing gemstones.
It is widely used in India, Pakistan, and other parts of South Asia.
1 ratti = 0.182 grams (approximate standard).
Note: Some regions may use slightly different ratti values, but 0.182 g is the most common.
What is a Carat?
Carat (ct) is the international standard unit for gemstone weight.
1 carat = 0.2 grams.
Carats are subdivided into 100 points (e.g., 0.50 ct = 50 points).
Ratti to Carat Conversion Formula
Formula:
Carat
=
Ratti
×
0.91
Carat=Ratti×0.91
Since:
1 ratti ≈ 0.182 g
1 carat = 0.2 g
Therefore: 0.182 g / 0.2 g ≈ 0.91 carat
Quick Conversion Table
Ratti Carat (Approx)
1 0.91 ct
2 1.82 ct
3 2.73 ct
5 4.55 ct
10 9.10 ct
Why Convert Between Ratti and Carat?
Global Standards: Carat is used worldwide in trade and certification.
Transparency: Buyers can compare prices accurately.
Appraisal: Gem testing labs use carats for official reports.
Conclusion
Whether you’re buying a gemstone in India or exporting it abroad, knowing how to convert ratti to carat ensures fair trade and clear communication. Always ask for weights in both units if you want full clarity!