Your astrologer said "wear a 5 ratti Pukhraj" — but the gemstone listing says "4.55 carats." Are they the same? Almost! Carat is the international jewellery unit, ratti is the traditional Vedic unit, and converting between them confuses almost every gemstone buyer. This free calculator solves it in one click.
Enter a weight value to see the conversion.
Based on the standard: 1 Ratti = 0.91 Carat = 182.25 mg (pakki ratti)
Quick Carat to Ratti Conversion Chart
1 Carat
1.1 Ratti
2 Carat
2.2 Ratti
3 Carat
3.3 Ratti
4 Carat
4.4 Ratti
5 Carat
5.49 Ratti
6 Carat
6.59 Ratti
7 Carat
7.69 Ratti
8 Carat
8.79 Ratti
9 Carat
9.89 Ratti
10 Carat
10.99 Ratti
Based on the standard: 1 Ratti = 0.91 Carat
Carat vs Ratti — What's the Difference?
Carat is the international standard for weighing gemstones — 1 carat equals exactly 200 milligrams. Ratti is the traditional Indian unit, used for centuries in Vedic astrology, historically based on the weight of the ratti seed (Gunja). Today, the standard "pakki ratti" used across the gemstone trade equals 0.91 carat (182.25 mg) — the standard this calculator uses.
Astrological recommendations are almost always given in ratti, while gemstones are sold in carats — getting the conversion wrong means wearing a stone lighter than prescribed, which may reduce its astrological effect. A traditional tip: when in doubt between two available weights, astrologers generally suggest going slightly above the prescribed ratti, never below.
Frequently Asked Questions
How many carats is 1 ratti?
1 ratti = 0.91 carat (182.25 milligrams), as per the standard pakki ratti used in the gemstone trade.
Why do some jewellers use a different ratti value?
The traditional "kachi ratti" (based on the actual Gunja seed, ~121 mg) differs from the standardised "pakki ratti" (182.25 mg). Always confirm which standard is being used before buying.
How much ratti gemstone should I wear?
The common guideline is about 1 ratti per 10–12 kg of body weight, adjusted for the planet's strength in your chart. For your exact prescribed weight, consult Rohit Sharma.