Gold Karat & Purity Chart, Weight Units (Tola to Grams) & Formulas
Authoritative reference for gold buyers and jewellers: the full gold karat purity chart (10K–24K purity %), tola/gram/masha/ratti weight conversions, gold market terminology, hallmark codes, and exact calculation formulas.
1 tola = 11.664 grams (11.66 g) — the standard South Asian gold weight unit.
Gold purity by karat: 24K = 99.9% pure · 22K = 91.67% · 21K = 87.5% · 18K = 75% · 14K = 58.3% · 10K = 41.7%.
The Goldify Pro Gold Guide is a free reference for gold buyers, jewellers, and investors. It covers the full gold karat purity chart from 10K through 24K, traditional South Asian and Middle Eastern weight units — tola, masha, ratti, and gram — with exact conversion factors, calculation formulas for buying and selling, and a glossary of essential gold market terms including hallmark codes, making charges, and wastage. Use the four tabs below to navigate between Weight Units, Karat Purity, Glossary, and Formulas.
A factual reference for gold weight units, karat purity standards, industry terminology, and calculation formulas — everything a gold trader or jeweller needs in one place.
Weight Units
Tola · Masha · Ratti
Karat Purity
9K to 24K standards
Gold Glossary
14 key terms defined
Formulas
4 calculation sets
The Goldify Pro Gold Guide is a comprehensive reference for anyone who buys, sells, or trades gold — from first-time buyers to professional jewellers. Use the tabs below to look up weight unit conversions (tola, masha, ratti, gram, troy ounce), understand karat purity standards, explore a full gold glossary, and apply precise calculation formulas used by the trade.
The TMR system (Tola–Masha–Ratti) is the traditional gold weight standard used across Pakistan, India, Bangladesh, and neighbouring regions. It is used alongside grams in most South Asian gold markets.
Tola
11.664g
= 12 Masha = 96 Ratti
Masha
0.972g
= 8 Ratti = 1/12 Tola
Ratti
0.1215g
= 1/8 Masha = 1/96 Tola
TMR ↔ Gram Conversions
A tola is exactly 11.664 grams; a troy ounce is 31.1035 grams. The table below converts every common gold weight unit to its metric equivalent.
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Understanding Gold Weight Units in South Asia
Gold trading in Pakistan, India, and Bangladesh has historically used the tola system — a measurement rooted in ancient Vedic trade. One tola, standardized at 11.664 grams, remains the dominant unit for quoting gold prices in South Asian markets, even as international spot prices are denominated in troy ounces. Understanding the relationship between tola, masha, ratti, gram, and troy ounce is essential for anyone participating in these markets.
The masha (1/12 of a tola = 0.972 g) and ratti (1/96 of a tola = 0.1215 g) are used for precise measurement of small quantities — particularly for gemstone-set jewellery and fine pieces where fractions of a gram matter. Goldify Pro's converters handle all these unit conversions automatically in real time using live gold rates.
Karat Purity — What Every Jewellery Buyer Must Know
The karat system divides pure gold into 24 parts. 24 Karat (24K) gold is 99.9% pure and used for bullion coins and investment bars. 22 Karat (22K) — the most popular for jewellery in South Asia — is 91.6% pure gold alloyed with copper or silver for durability. 18 Karat (18K) is 75% pure and preferred in Western markets for its resistance to scratching.
When buying jewellery, always verify the hallmark stamp — a government-certified purity mark that guarantees the gold content. In Pakistan, the PSQCA hallmark certifies purity; in India, the BIS hallmark is the legal standard. Unlicensed or unstamped jewellery carries risk of misrepresented purity, which can significantly affect resale value.
How to Calculate Gold Value — The Right Way
The correct formula for gold value is: Value = Weight (tola) × Rate per Tola. For gram-based calculations, divide the tola rate by 11.664 to get the per-gram rate first. Never divide a per-gram rate back to tola by multiplying by 11.664 if the original rate was already per-tola — this introduces compounding errors. Always work from a single authoritative rate source and apply the exact conversion constants used in this guide.
Frequently Asked Questions
Put the Formulas to Work
Apply any of these conversions instantly using Goldify Pro's free professional calculators — no manual math required. All tools support custom gold rates.
Open Gold CalculatorsView Quick Rate TablesImportant Disclaimer
Educational purpose only. All content in this guide is provided for informational and educational purposes. It does not constitute financial, investment, or trading advice of any kind.
Conversion constants. All weight conversion values (Tola, Masha, Ratti, Troy Ounce) are based on internationally accepted and historically established standards.
Market prices vary. Gold rates displayed elsewhere on this site reflect live market data and are subject to change. Always verify with your local dealer before any transaction.
Sources: World Gold Council, LBMA, Bureau of Indian Standards, Pakistan Standards & Quality Control Authority.
Karat Guide
Gold Karat & Purity Table
Gold purity is measured in karats (K). Pure gold is 24K. Every karat represents 1/24th part of pure gold. Use this table to compare purity, fineness, and common uses from 10K to 24K.
| Karat | Purity | Purity Bar | Fineness |
|---|---|---|---|
10K | 41.67% | 417 | |
12K | 50.00% | 500 | |
14KPopular | 58.33% | 583 | |
16K | 66.67% | 667 | |
18KPopular | 75.00% | 750 | |
20K | 83.33% | 833 | |
21KPopular | 87.50% | 875 | |
22KPopular | 91.67% | 917 | |
23K | 95.83% | 958 | |
24KPopular | 99.99% | 999 |
Fineness (Parts per 1000)
Fineness = (Karat ÷ 24) × 1000e.g. 22 Karat → (22 ÷ 24) × 1000 = 916.7
Purity Percentage
Purity % = (Karat ÷ 24) × 100e.g. 18 Karat → (18 ÷ 24) × 100 = 75.0%
Pure Gold Weight
Pure wt = Total weight × (Karat ÷ 24)e.g. 10g of 18 Karat → 10 × 0.75 = 7.5g pure
Gold Value
Value = Pure weight × Price per grame.g. 7.5g × rate/g = total gold value
Fineness is stamped on hallmarked gold (e.g. 750 = 18K, 916 = 22K, 999 = 24K). Always verify with a certified assayer.
Editorial Policy
Goldify Pro Editorial Team
VerifiedGold market analysts & weight-conversion specialists
Last reviewed: April 15, 2026·Last updated: April 15, 2026
Content verification
Sourcing
ISO 9202, NIST & British Indian Mints Act standards for all weight and purity figures.
Corrections
Factual errors corrected within 72 hours. Significant changes noted with a dated update badge.
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