Gold Purity Converter - Gold Silver Rate Live

Q: How is the gold value calculated from karat and weight?

Gold value = Pure gold weight × Rate per gram (24K). First calculate pure gold: Weight × Purity%. For example, 10 grams of 22K gold → 10 × 91.67% = 9.167g pure gold. Then multiply by the 24K rate: 9.167 × ₹9,500 = ₹87,086.50.

Interactive Tool

Gold Purity Converter Calculator

Select a conversion mode, enter your values, and get instant results — purity percentage, pure gold weight, and total value.

Enter Your Gold Details

Gold Karat

Purity Percentage (%)

Weight (grams)

24K Rate (₹/gram)

Purity

91.67%

916‰ millesimal

Equivalent Karat

22K

BIS 916 hallmark

Pure Gold Content

9.167 g

of 10g total weight

Gold Value

₹87,084

pure gold × rate

Values are calculated from the rate you entered. For the latest gold rate, visit our Gold Rate Today page. Actual dealer prices may include making charges and GST.

Reference

Gold Karat to Purity Percentage — Complete Table

The table below lists every standard gold karat with its millesimal fineness, purity percentage, pure gold in 10 grams, and common use across markets.

Karat	Millesimal (‰)	Purity %	Pure gold in 10g	BIS Hallmark	Common Use
24K Popular	999‰	99.90%	9.990 g	999	Bullion bars, coins, investment gold
23K	958‰	95.83%	9.583 g	958	Britannia standard (UK)
22K Popular	916‰	91.67%	9.167 g	916	Indian & GCC jewellery, BIS 916 hallmark
21K	875‰	87.50%	8.750 g	875	Gulf region jewellery
20K	833‰	83.33%	8.333 g	833	Traditional Gulf jewellery
18K Popular	750‰	75.00%	7.500 g	750	European & luxury jewellery
14K	585‰	58.33%	5.833 g	585	Western markets, US jewellery
10K	417‰	41.67%	4.167 g	417	Entry-level jewellery
9K	375‰	37.50%	3.750 g	375	UK & Australian jewellery

* Millesimal fineness = purity parts per thousand. 999‰ = 99.9% pure gold. BIS hallmark numbers correspond to the millesimal fineness stamped on certified jewellery in India.

How It Works

Gold Purity Conversion Formulas

Formula 1 — Karat to Purity Percentage

Purity (%) = (Karat ÷ 24) × 100

Example: 22K → (22 ÷ 24) × 100 = 91.67%
Example: 18K → (18 ÷ 24) × 100 = 75.00%
Example: 14K → (14 ÷ 24) × 100 = 58.33%

Formula 2 — Purity to Millesimal Fineness

Millesimal Fineness (‰) = Purity (%) × 10

Example: 91.67% × 10 = 916‰ → This is the BIS 916 hallmark
Example: 75.00% × 10 = 750‰ → This is the BIS 750 hallmark

Formula 3 — Pure Gold Content

Pure Gold (g) = Total Weight (g) × Purity (%)

Example: 10g of 22K gold → 10 × 0.9167 = 9.167g of pure gold
Example: 20g of 18K gold → 20 × 0.7500 = 15g of pure gold

Formula 4 — Gold Value Calculation

Gold Value = Pure Gold Weight (g) × 24K Rate (₹/g)

Example: 9.167g × ₹9,500 = ₹87,086.50

Step-by-Step Examples

Sample Gold Purity Calculations

These worked examples use a 24K gold rate of ₹9,500/gram. The rate you enter in the calculator will update the values in real time.

Karat 22K (BIS 916)
Purity 91.67% (916‰)
Total weight 10 grams
Pure gold 9.167 g
24K rate used ₹9,500.00/g

✓ Estimated value: ₹87,086.50

Karat 18K (BIS 750)
Purity 75.00% (750‰)
Total weight 20 grams
Pure gold 15 g
24K rate used ₹9,500.00/g

✓ Estimated value: ₹1,42,500.00

BIS Hallmarking India

What Do BIS Hallmark Numbers Mean?

The Bureau of Indian Standards (BIS) hallmarking system certifies gold jewellery purity. Since 2021, BIS hallmarking is mandatory for gold jewellery sold in India. The number stamped on certified jewellery is the millesimal fineness.

916

22 Karat Gold

91.6% Pure Gold

The most popular gold purity for jewellery in India. 916 gold is durable and close to pure gold in colour. Required for making intricate designs.

750

18 Karat Gold

75.0% Pure Gold

18K gold (750 hallmark) is harder than 22K, making it ideal for diamond-studded and studded jewellery. Popular in European styles.

585

14 Karat Gold

58.5% Pure Gold

14K gold is more affordable and very durable. The 585 hallmark is common in Western markets and increasingly available in India.

999

24 Karat Gold

99.9% Pure Gold

The purest form of gold. Used for bullion coins, bars, and digital gold investment. Too soft for regular jewellery making.

BIS hallmarked jewellery also carries a 6-digit alphanumeric HUID (Hallmark Unique ID) which can be verified on the BIS Care app or website at www.bis.gov.in.

FAQ

Frequently Asked Questions — Gold Purity

What is gold purity and how is it measured?

Gold purity measures the proportion of pure gold in an alloy. It is expressed in three ways: karat (K), millesimal fineness (e.g. 916‰), and percentage (%). 24K gold is the purest at 99.9%. Most jewellery uses 22K (91.6%) or 18K (75%) because pure 24K gold is too soft for everyday wear.

What does BIS 916 hallmark mean?

BIS 916 is the Bureau of Indian Standards hallmark for 22K gold. The number 916 means the gold contains 916 parts per thousand — or 91.6% — pure gold. Since 2021, BIS hallmarking is mandatory for all gold jewellery sold in India. The hallmark guarantees the quality of the gold you are buying.

How do I convert 22K gold to purity percentage?

Divide the karat number by 24 and multiply by 100. For 22K: (22 ÷ 24) × 100 = 91.67%. This means 22K gold is 91.67% pure gold. The remaining 8.33% is copper, silver, or zinc added to improve hardness and durability for jewellery making.

How much pure gold is in 10 grams of 22K gold?

10 grams of 22K gold contains 9.167 grams of pure gold. Formula: 10 × 91.67% = 9.167g. At ₹9,500/gram (24K rate), the pure gold value is approximately ₹87,086.50.

What is the difference between 916 and 750 gold?

916 gold (22K) contains 91.6% pure gold, while 750 gold (18K) contains 75% pure gold. 916 is closer to pure gold in colour and higher in value per gram. 750 (18K) is harder, making it better for detailed and diamond-studded jewellery. Both carry BIS hallmarks certifying their purity.

How is the gold value calculated from karat and weight?

Gold value = Pure gold weight × 24K rate per gram. Step 1: Calculate pure gold — Weight × Purity%. Step 2: Multiply by the 24K rate. For example: 10g of 22K → 9.167g pure gold → 9.167 × ₹9,500 = ₹87,086.50. Note: actual purchase or sale price may differ due to making charges, GST, and dealer margins.

Is 24K gold better than 22K for jewellery?

24K gold is purer (99.9%) and more valuable per gram, but it is too soft for most jewellery — it scratches and bends easily. 22K gold (91.6% pure) strikes the best balance between purity and durability, which is why it is the most popular choice for gold jewellery in India and the GCC.

What is the purity of gold in coins and bars sold in India?

Gold coins and bars sold by banks and certified dealers in India are typically 24K (999‰ millesimal fineness — 99.9% pure). Some coins, such as the Sovereign gold bond and RBI coins, are 999 purity. Always check the BIS certification or assay certificate when buying gold coins or bars.

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