Gold Karat Purity & Weight Unit Converter
HOTConvert gold weight (Korean Don, Grams, Troy Ounces) and compute pure fine gold content across 24K, 18K, and 14K.
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(CLS Prevention Active · Zero Shift)1 Korean Don = 3.75g / 1 oz t = 31.1035g
24K Pure Fine Gold (99.9%)
Enter market spot to calculate melt value
Weight Conversions & Pure Gold Content
0.999g
0.266 Don / 0.0321 oz t
1.000g
0.0010 kg
0.267Don
0.027 Nyang
0.0322oz t
~0.0353 regular oz
$84.92
* Intrinsic scrap bullion value excluding refinery melting loss and jeweler design fees.
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(CLS Prevention Active · Zero Shift)Precious Metals Metric Standards: Karat Fractions, Traditional Asian Don, and International Troy Ounces
Gold trading and precious jewelry valuation operate across disparate regional weight metrics. While international commodity exchanges (LBMA, COMEX) price bullion in US Dollars per 'Troy Ounce (oz t)', domestic consumer markets in South Korea, Japan, and parts of East Asia traditionally conduct physical retail transactions using the 'Don' (1 Don = 3.75 grams) and 'Nyang' (10 Don = 37.5 grams). Failing to distinguish between these regional units introduces severe valuation errors during cross-border bullion acquisitions.
Crucially, investors must avoid conflating the standard avoirdupois ounce with the precious metal Troy Ounce. An everyday postal ounce weighs approximately 28.35 grams, whereas a precious metal Troy Ounce (oz t) equals precisely 31.1034768 grams—nearly 9.7% heavier. Calculating precious metal scrap value using standard commercial ounces undervalues gold by nearly one-tenth of its intrinsic net worth. Exactly one troy ounce yields approximately 8.294 traditional Korean Don.
Furthermore, jewelry purity is universally graded in 'Karats' based on a 24-part fractional scale ($/24). Pure 99.9% fine investment gold is designated as 24K, while 18K contains 75.0% pure gold, and 14K contains 58.5% pure gold. Evaluating scrap estate jewelry requires isolating fine gold mass from non-precious alloy metals. OrvoKit's Gold Karat & Weight Converter delivers simultaneous cross-conversions across Grams, Troy Ounces, Regular Ounces, Kilograms, and Korean Don alongside scrap melt calculations.
Mathematical Foundations: Karat Proportions & Troy Ounce Weight Physics
The 24-part purity ratio, statutory Korean Don standards, and scrap jewelry melt equations.
The karat system traces back to ancient carob seeds used as balance counterweights, where 24 carobs equaled one Roman solidus coin. 18 Karat equals 18/24 (75.0% pure gold), and 14 Karat equals 14/24 (58.33% statutory, 58.5% commercial standard).
👉 The 15g 18K chain yields 11.25g of pure gold, resulting in an intrinsic scrap valuation of approximately $818.
- Statutory 3.75g Metric Codification: Under South Korean weights and measures law, the traditional 'Don' unit is legally fixed at exactly 3.750 grams.
- Troy vs Avoirdupois Mass: Precious metals trade exclusively in troy ounces ($1\text{ oz t} = 31.1035\text{ g}$), whereas groceries trade in avoirdupois ounces ($1\text{ oz} = 28.3495\text{ g}$).
- Colored Gold Alloy Parity: White, rose, and yellow 18K gold all possess identical 75.0% fine gold purities; only secondary alloying metals (copper, silver, palladium) differ.
- Hallmark Standards: European fineness hallmarks stamp '750' for 18K, '585' for 14K, and '999' or '999.9' for fine investment bullion.
Gold Karat Fineness, Hallmarks, and Regional Weight Equivalents
Comparative matrix across purities, hallmark stamps, and regional weight metrics.
| Fineness Tier (Karat) | Gold Purity (%) | European Hallmark Stamp | Fine Gold per Korean Don (3.75g) | Typical Applications & Durability |
|---|---|---|---|---|
| 24K (Pure Gold) | 99.90% to 99.99% | 24K / 999 / 999.9 | 3.750 g (100% fine) | Investment bars, Asian wedding jewelry, mint coins |
| 22K (Crown Gold) | 91.60% to 91.67% | 22K / 916 | 3.435 g (0.916 Don) | Sovereign coins, Middle Eastern & Indian bridal gold |
| 18K (Fine Jewelry) | 75.00% | 18K / 750 | 2.813 g (0.750 Don) | Diamond bridal rings, luxury Swiss watches (Rolex) |
| 14K (Popular Commercial) | 58.50% | 14K / 585 | 2.194 g (0.585 Don) | Everyday fashion chains, earrings, durable daily wear |
| 12K (Vintage/Antique) | 50.00% | 12K / 500 | 1.875 g (0.500 Don) | Antique estate pieces, vintage gold-filled watch cases |
| 10K (Minimum US Legal) | 41.70% | 10K / 417 | 1.564 g (0.417 Don) | US class rings, affordable heavy jewelry |
| 1 Troy Ounce Bullion | 99.99% | 1 oz t / 999.9 | 31.1035 g (8.294 Don) | Global institutional trading standard bullion bars |
* ※ Always check for '750' or '585' stamps on inner ring shanks to verify genuine solid gold content rather than plating.
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(CLS Prevention Active · Zero Shift)How to Use
11. Enter Weight & Choose Unit
Input bullion or jewelry mass into Grams (g), Troy Ounces (oz t), Korean Don (3.75g), Ounces (oz), or Nyang.
22. Select Karat Purity Tier
Choose alloy grade: 24K (99.9%), 22K (91.6%), 18K (75.0%), 14K (58.5%), or 10K (41.7%).
33. Input Current Market Spot Price
Enter current spot price per gram, per troy ounce, or per Korean Don to evaluate intrinsic melt value.
44. View Fine Gold Content & Refiner Scrap Estimate
Inspect net fine gold weight and estimated cash payout factoring in standard assay refining fees (2-4%).
Estate Scrap Gold, Asian Bullion & International Trade Scenarios
Real-world precious metal trading and cross-border conversion case studies.
Liquidating a 24K 3.75g baby ring at daily spot rates without scrap melt deduction.
Translating gold spot at $2,400/oz t ($77.16/g) into domestic Korean 1-Don base cost (~$289.35).
Calculating that 25 grams of mismatched 14K jewelry contains 14.63 grams of pure gold (~$1,100 melt value).
Converting a 100g European investment cast bar into 3.215 troy ounces or 26.66 Korean Don.
💡 Gold Trading Pro Tips & Value-Protection Rules
Solid gold jewelry carries stamped numerical purity hallmarks. Avoid pieces stamped 'GP' (Gold Plated), 'GF' (Gold Filled), or 'RGP' which hold negligible scrap gold value.
Precious metal refiners pay exclusively for gold mass. High-end jewelers will unmount or tare out synthetic cubic zirconias before weighing.
Jewelers and refiners incur costs melting low-karat alloys into fine 24K bullion, deducting a standard refining fee from the gross melt value.
Cast bars carry 3-5% fabrication minting premiums and local sales tax/VAT (10% in Korea), unlike non-physical gold accounts (e.g. KRX gold).
⚠️ Common Pitfalls & Mistakes to Avoid
Frequently Asked Questions (FAQ)
Expert answers to the most frequently asked questions and edge cases.
An everyday postal/grocery ounce (avoirdupois) weighs approximately 28.35 grams, whereas a precious metal Troy Ounce (oz t) equals precisely 31.1034768 grams (~9.7% heavier). Global commodities exchanges trade gold and silver exclusively in troy ounces.
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