Ratti to Carat Conversion: Understand Gemstone Weights Before You Buy

When buying a Navratna gemstone—which includes Ruby, Pearl, Red Coral, Emerald, Yellow Sapphire (Pukhraj), White sapphire, Blue Sapphire (Neelam), Hessonite (Gomed), and Cat’s Eye (Lehsunia)—you’ll often hear the word ratti used to describe its weight.

But if you’re browsing certified gems or shopping online, you’ll also see carat mentioned. Let’s clear the confusion and understand how to convert between the two. Also, some people get confused between Karat Vs Carat. But, no worries, we’ve got a complete guide to clear your confusion.

What is a Ratti?

Ratti is a traditional Indian weight unit still widely used in the gemstone trade, especially for astrological purposes.

There are two kinds:

• Pakki Ratti: 180 mg (0.90 carat)
• Kachi Ratti: 120 mg (0.60 carat)

Ratti to Carat Conversion Table 

Note:
– 1 carat = 200 mg

Where is Kachi Ratti Used? 

Kachi Ratti is more commonly used in traditional markets across:

• Punjab
• Haryana
• Rishikesh & Haridwar
• Parts of Gujarat
• Parts of Maharashtra

Elsewhere in India, Pakki Ratti is the standard.

How Many Ratti Should I Wear? 

Always consult your astrologer first. Each person’s birth chart (kundli) determines the correct stone and weight.

If guidance is unavailable, a general rule of thumb is:

1 ratti per 10 kg of body weight

Example: A person weighing 70 kg may wear a 7-ratti stone (approx. 6.3 carats if using pakki ratti).

Important:

This is only a guideline. Astrological recommendation should always take precedence.

A Note on What We Sell 

We only sell gemstones based on carat, which is the internationally accepted unit of weight in the gemstone trade. This ensures transparency, accuracy, and global standardization.

-Learn about the real benefits of buying gemstones online with Precious Carats.

Final Tip 

Clarity in weight units is key to getting the right gemstone at the right price. Always ask whether the seller is quoting in pakki or kachi ratti, and cross-check the certified carat weight.

Explore certified, untreated Navratna gemstones at PreciousCarats — where trust meets tradition. Also, learn about 30 gemstones for healing for chakras, reiki, aura & emotional balance and get to know more about it with Precious Carats.

Ratti to Carat Conversion Chart (2 to 11 Ratti)

Explanatory Conversion Chart: Ratti (Traditional) to Carat

FAQ’s

📿 How Many Ratti Should I Wear?

• Always follow your astrologer’s guidance.

• General rule of thumb: 1 Ratti per 10 kg body weight.

Example:

• 70 kg person → 7 Ratti stone ≈ 6.3 carats (Pakki Ratti basis).

⚠️ Important: This is only a rule of thumb. Personalized astrological advice is best.

How many carats is 5.25 ratti ?

We’re using Pakki Ratti (the standard in most of India):

• 1 Ratti (Pakki) = 0.90 carat

• So, 2.25 Ratti = 2.25 × 0.90 carat

Step by step:

• 5 × 0.90 = 4.50

• 0.25 × 0.90 = 0.225

• Total = 4.725 carats

✅ 5.25 Ratti = 4.725 carats (Pakki Ratti basis)

👉 If someone is using Kachi Ratti (0.60 carat each), then:
5.25 × 0.60 = 3.15 carats.

What should be the Price per ratti of a Gem ?

At preciouscarats.com , we  price our gems as per the international standard of gemstone weight  ie . Carat which results in a benefit of about 10 % above weight charged using pakki ratti and 40 % above weights charges on Kachi ratti .

How many carats is 7.25 ratti ?

We’re using Pakki Ratti (the standard in most of India):

• 1 Ratti (Pakki) = 0.90 carat

• So, 7.25 Ratti = 7.25 × 0.90 carat

Step by step:

• 7 × 0.90 = 6.3

• 0.25 × 0.90 = 0.225

• Total = 6.525 carats

✅ 7.25 Ratti = 6.525 carats (Pakki Ratti basis)

👉 If someone is using Kachi Ratti (0.60 carat each), then:
7.25 × 0.60 = 4.35 carats.

How many carats is 2.25 Ratti?

• Pakki Ratti: 2.25 × 0.90 = 2.025 carats

• Kachi Ratti: 2.25 × 0.60 = 1.35 carats

❓ How many carats is 3.25 Ratti?

• Pakki Ratti: 3.25 × 0.90 = 2.925 carats

• Kachi Ratti: 3.25 × 0.60 = 1.95 carats

❓ How many carats is 4.25 Ratti?

• Pakki Ratti: 4.25 × 0.90 = 3.825 carats

• Kachi Ratti: 4.25 × 0.60 = 2.55 carats

  ❓ How many carats is 6.25 Ratti?

  • Pakki Ratti: 6.25 × 0.90 = 5.625 carats

  • Kachi Ratti: 6.25 × 0.60 = 3.75 carats

    ❓ How many carats is 8.25 Ratti?

    • Pakki Ratti: 8.25 × 0.90 = 7.425 carats

    • Kachi Ratti: 8.25 × 0.60 = 4.95 carats

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    ❓ How many carats is 9.25 Ratti?

    • Pakki Ratti: 9.25 × 0.90 = 8.325 carats

    • Kachi Ratti: 9.25 × 0.60 = 5.55 carats

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    ❓ How many carats is 10.25 Ratti?

    • Pakki Ratti: 10.25 × 0.90 = 9.225 carats

    • Kachi Ratti: 10.25 × 0.60 = 6.15 carats