Learn about the key gold and gemstone units and how to convert between them with simple, accurate formulas.
Gold and gemstones in India are weighed using grams, karats, and Ratti. Each unit serves a distinct purpose. Understanding their differences helps you price jewellery, read valuations, and compare offers. Ratti in Gold often varies by local practice, so always confirm the standard before converting.
Ratti is a traditional Indian unit of mass derived from the gunja seed. Two standards are common today:
Jeweller’s (sunari) Ratti: 1 Ratti = 0.1215 grams
Pakki Ratti (astrological use): 1 Ratti ≈ 0.182 grams
Both appear in jewellery and gemstone trade. Confirm which standard your jeweller or valuer follows. For quick reference, 1 Ratti gold in gram is either 0.1215 g (jeweller’s) or ≈0.182 g (Pakki).
For example, 5 Ratti equals ≈0.6075 g (5 × 0.1215) or ≈0.91 g (5 × 0.182)
Understanding how Ratti and karat differ helps ensure accurate gold and gemstone valuation.
Here is a table highlighting the main differences between the two units:
| Aspect | Ratti | Karat (ct) |
|---|---|---|
What it measures |
Traditional Indian unit of mass |
International unit of gemstone mass |
Fixed value |
Two standards in use |
1 ct = 0.2 g |
Common standards |
Jeweller’s Ratti = 0.1215 g; Pakki Ratti ≈ 0.182 g |
Single global standard |
Usage |
Jewellery and astrological gemstones in India |
Diamonds and coloured gemstones worldwide |
Variability |
Varies by standard and local practice |
No variability |
Typical context |
Local trade, legacy invoicing |
Certification, lab reports, retail |
Convert to grams |
Multiply Rattis by 0.1215 or 0.182 |
Multiply karats by 0.2 |
Convert to each other |
ct = (Ratti in g) ÷ 0.2 |
Ratti = (ct × 0.2) ÷ Ratti in g |
Not to confuse with |
Karat (K) = gold purity |
Karat (K) = gold purity |
Note: Always confirm which Ratti standard your counter uses before converting or pricing.
Understanding conversions between karat, Ratti, and gram ensures accurate jewellery valuation and pricing.
Here is a simple reference table showing how these units convert:
| Conversion Type | Formula | Result (Approximate) |
|---|---|---|
1 Ratti to Karat (Jeweller’s) |
0.1215 ÷ 0.2 |
0.6075 ct |
1 Ratti to Karat (Pakki) |
0.182 ÷ 0.2 |
0.91 ct |
1 Karat to Ratti (Jeweller’s) |
0.2 ÷ 0.1215 |
1.65 Ratti |
1 Karat to Ratti (Pakki) |
0.2 ÷ 0.182 |
1.10 Ratti |
1 Ratti in Gram |
- |
0.1215 g or 0.182 g |
Since Ratti can follow two standards in India, always confirm whether your jeweller uses the jeweller’s Ratti (0.1215 g) or the Pakki Ratti (0.182 g) before calculating.
These conversion factors help you understand how gemstone and gold weights are represented in different systems.
Karat is a globally standardised unit for measuring gemstone mass, where 1 karat equals 0.2 grams.
In contrast, Ratti measurements differ slightly depending on the standard used.
Using the jeweller’s Ratti (0.1215 g):
1 Ratti = 0.1215 ÷ 0.2 = 0.6075 karat
Using the Pakki Ratti (0.182 g):
1 Ratti = 0.182 ÷ 0.2 = 0.91 karat
For example, a gemstone weighing 5 Rattis would be approximately 3.04 karats (jeweller’s) or 4.55 karats (Pakki).
Tip: For consistent valuation, always check which standard your jeweller or appraiser follows before performing a gold Ratti to gram conversion.
Understanding the conversion between Ratti and gram helps ensure correct valuation during gold or gemstone transactions.
The value of 1 Ratti in gram depends on which standard you use:
Jeweller’s (Sunari) Ratti: 1 Ratti = 0.1215 grams
Pakki Ratti (Astrological use): 1 Ratti = 0.182 grams
So, when calculating total weight, multiply the number of Rattis by the corresponding conversion factor.
For example, If a gold ornament weighs 10 Rattis, it equals either 1.215 grams (jeweller’s standard) or 1.82 grams (Pakki standard).
Tip: Always confirm the Ratti type your jeweller uses before performing any conversion. Using the wrong factor can affect your valuation and price estimate.
The price of gold per Ratti varies depending on the daily market rate, city, and purity level (22K or 24K).
Since Ratti is not an SI unit, gold dealers typically convert it to grams to calculate its value accurately.
Use this simple formula for estimating price:
Gold price per Ratti = Current gold rate per gram × Ratti-to-gram conversion
For example, if the 24K gold rate is ₹6,200 per gram:
1 Ratti (0.1215 g) = ₹6,200 × 0.1215 = ₹754
1 Ratti (0.182 g) = ₹6,200 × 0.182 = ₹1,128
Disclaimer: Gold prices fluctuate daily based on market trends and location. Always check the latest city-wise rate before making any purchase or valuation.
Gold rates in India fluctuate daily due to global and domestic market factors. These include international gold prices, currency movements, import duties, and local demand. The rate also varies between 22K and 24K purity.
24K gold is considered pure gold and used mainly for investment
22K gold contains a small alloy percentage, making it suitable for jewellery
To estimate a gold item’s value, multiply its weight in grams by the current per-gram rate of the desired purity. For example, when the 24K gold rate is ₹6,200 per gram, a 5-gram item is valued at ₹31,000 before making or processing charges.
Note: Gold rates vary slightly across cities due to local taxes, logistics, and regional demand. Always check the latest live rate before purchase or valuation.
A gold loan is a secured form of credit where your gold jewellery is pledged as collateral. The loan amount depends on the purity, weight, and current market value of the gold.
Loan-to-Value (LTV) ratio
Most lenders offer up to 75% of the gold’s market value
Valuation method
Gold is tested for purity (usually 18K–24K) and weighed in grams
Tenure
Typically ranges from a few months to three years
Repayment options
Borrowers can choose EMIs, interest-only payments, or bullet repayment
Understanding the weight and purity of your gold through accurate gold Ratti to gram conversion ensures correct valuation during loan processing.
Disclaimer: Gold loan interest rates, LTV ratios, and repayment terms vary by lender. Always check the latest policy before applying.
The loan amount you can receive per gram of gold depends on the gold’s purity, market price, and lender’s LTV policy.
Use this simplified formula to estimate:
Gold loan per gram = (Current gold rate per gram × LTV%) × (Purity factor)
For example, if the 22K gold rate is ₹5,700 per gram and the LTV ratio is 75%:
₹5,700 × 75% = ₹4,275 per gram (approx.)
Purity of gold
Higher purity means higher valuation
Current market rate
Increases or decreases based on global gold prices affects Gold Loan Per Gram.
Lender policy
Some lenders may offer slightly higher LTV ratios for smaller loans.
Note: These figures are indicative. Actual loan amounts vary depending on the lender’s valuation and market conditions.
The value of 1 gram in Ratti depends on the standard used.
Jeweller’s Ratti: 1 gram = 8.23 Rattis (1 ÷ 0.1215)
Pakki Ratti: 1 gram = 5.49 Rattis (1 ÷ 0.182)
Always confirm the Ratti standard to ensure accurate conversion.
1 Ratti equals 0.6075 karat if you use the jeweller’s Ratti (0.1215 g) and 0.91 karat if you use the Pakki Ratti (0.182 g). This difference arises because Ratti is not standardised across India.
No, 1 karat equals 0.2 grams. Karat measures gemstone weight, while gram is a metric unit. These two are not equivalent, so conversions must be made carefully.
Use this simple formula:
For jeweller’s Ratti: Ratti = Karat × (0.2 ÷ 0.1215) = Karat × 1.646
For Pakki Ratti: Ratti = Karat × (0.2 ÷ 0.182) = Karat × 1.099
Accurate conversion helps ensure the correct weight and valuation during gemstone or jewellery assessments.