Purity
9K (9ct) gold is 37.5% fine gold and uses the recognized 375 fineness mark in the United Kingdom.
Gold spot price
$4,392.72 per troy ounce
$141.23 per gram of pure gold · $105.92 per gram of 18K
Figures show melt value — the market value of the recoverable gold content. They are not an offer, an appraisal, or investment advice. Buyers pay a percentage of melt that varies by business model.
9 carat · 37.5% pure
9K Gold Price & Calculator
Calculate 9K or 9ct gold from the live spot price and verify the 375 hallmark, net weight, and likely deductions before treating any quote as fair.
Input
Weight & purity
Max input: 999,999 per item.
Pure gold
0.0000 oz
Price / oz
$4,392.72
Price / gram
$141.23
Formula: weight in troy ounces × karat purity × gold price per ounce. Dealer offers may be lower than this market-value estimate.
Live market estimate
Current 9K gold value in USD
9K / 375 fine · spot-based melt estimate
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This is an international spot-based melt estimate, not an official local jewelry retail or buyback rate.
Calculated from XAU/USD spot and the selected currency exchange rate.
Open with these settingsCommon market
It is a familiar jewelry standard in the UK and other markets that use British-style carat descriptions.
Valuation
A 9K item’s metal value is 0.375 of the pure-gold value for the same net weight.
How to calculate 9K or 9ct gold value
- 1Look for 9K, 9ct, or a complete UK hallmark containing the 375 fineness mark.
- 2Weigh the gold item accurately; deduct stones, watch movements, springs, and other non-gold parts.
- 3Select 9K so the calculator multiplies the fine-gold price by 0.375.
- 4Compare the melt estimate with resale value before scrapping branded, antique, or intact jewelry.
To put this into practice, use Gold Karat Calculator, check the assumptions with Gold Price Per Gram, and compare the result in 10K Gold Calculator.
What the 375 hallmark confirms
The UK government’s hallmarking guidance identifies 375 as the fineness mark for 9 carat gold: at least 375 parts gold per thousand. For gold articles over the UK exemption weight, a proper hallmark also includes a sponsor or maker mark and an Assay Office mark.
A standalone 375 stamp on an imported or underweight item is not the same evidence as a complete independently applied UK hallmark. It still tells you the claimed purity, but professional testing is sensible before a high-value sale.
9K price per gram formula
Start with the pure-gold price per gram, which is the troy-ounce spot price divided by 31.1034768. Multiply by 0.375 for the theoretical 9K melt value per gram. Then multiply by the net gold weight.
Do not divide a troy-ounce price by the 28.3495 grams in a kitchen ounce. That mistake overstates every result. The calculator performs the troy conversion and keeps the working precision behind the displayed rounded amount.
When 9K jewelry can be worth more than melt
Melt value is a metal floor, not a universal resale price. A signed maker, period design, complete set, wearable condition, or valuable stones can make a piece more desirable intact. Check comparable second-hand sales before allowing a buyer to destroy it for refining.
For true scrap, obtain itemized quotes using the same weight and purity. A buyer should be able to explain any difference between the calculated melt value and the amount offered.
Primary sources and further reading
- GOV.UK — Hallmarking practical guidance — Official 375 fineness and compulsory hallmark guidance.
- UK Hallmarking Act 1973 — Primary legislation for recognized precious-metal standards.
Common questions
Are 9K, 9ct, and 375 the same?
Yes. They are three common ways to describe gold that is 37.5% fine by weight.
Is 9K real gold?
Yes. It is a gold alloy. Its fine-gold share is lower than 10K, 14K, or 18K, so its melt value per gram is proportionally lower.
Does every 375 mark guarantee a UK hallmark?
No. A complete UK hallmark contains additional compulsory marks. If provenance or value is uncertain, arrange a professional test.
Open the calculator
Enter weight, purity, currency, and payout percentage in the main tool.