Ratti to Carat Conversion: Your Complete Guide to Gemstone Weight

 If you’re shopping for gemstones in India or South Asia, you’ll often hear the weight described in ratti. But if you’re buying or selling internationally, you’ll see carats everywhere.

So what’s the difference? How do you convert one to the other?

This blog will explain what ratti and carat mean, why conversion matters, and how you can easily do it yourself.

What is Ratti?

  • Ratti is a traditional Indian unit for measuring gemstones.

  • It is based on the weight of the Gunja (Abrus precatorius) seed.

  • Still widely used in India, especially for astrological gemstones.

  • Standardized modern value:

    1 ratti ≈ 0.182 grams

What is Carat?

  • Carat (ct) is the global standard unit for gemstone weight.

  • Used universally by jewelers, laboratories, and in the gemstone trade.

  • Defined as:

    1 carat = 0.2 grams

  • Carats are further divided into 100 points (so 0.50 ct = 50 points).

How to Convert Ratti to Carat

It’s actually very simple!

Formula:

Carat=Ratti×0.91\text{Carat} = \text{Ratti} \times 0.91

Why?

  • 1 ratti ≈ 0.182 g

  • 1 carat = 0.2 g

  • 0.182 ÷ 0.2 ≈ 0.91

Simple Rule:

Multiply ratti by 0.91 to get carats.

Quick Conversion Table

RattiCarat (Approx.)
10.91 ct
21.82 ct
32.73 ct
54.55 ct
109.10 ct

Example:

A 5 ratti gemstone ≈ 4.55 carats.

Why Is This Conversion Important?

Fair Pricing:
Carat is the standard for pricing in global markets. Knowing the conversion helps you check if you’re paying the right price.

Transparency:
Some sellers may use traditional units to confuse buyers. Being able to convert ensures clarity.

Certification:
Gemological labs always certify in carats.

Better Resale Value:
If you want to sell internationally, carat weight is what buyers need.

Buying Tips for Gemstone Shoppers

 Ask the seller for weight in both ratti and carats.
Check if they use the standardized ratti (some regions have small variations).
 Insist on certified weighing scales.
 For international trade, finalize the deal in carats.
 Get certified gemstone reports from recognized gem labs.

Final Thoughts

Whether you're buying gemstones for astrology, jewelry, or investment, understanding ratti to carat conversion is essential.

Just remember the simple formula:

Ratti × 0.91 = Carat

Use it to make smart, confident, and transparent buying decisions.

If you found this guide helpful, share it with friends or fellow buyers. Stay informed, shop

Comments

Post a Comment