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9ct Gold Price Per Gram in the UK: How to Calculate It

Turn the live pure-gold price into a realistic 9ct-per-gram baseline and understand what a UK buyer may deduct.

August 10, 2026 · 7 min read

9ct Gold Price Per Gram in the UK: How to Calculate It

Key points

  • 9ct gold is 37.5% fine gold and normally carries a 375 fineness mark.
  • The 9ct melt value per gram is the pure-gold gram price multiplied by 0.375.
  • A buyer offer is normally below melt value because it includes testing, refining and margin.

To put this into practice, use Gold Price Per Gram, check the assumptions with Gold Karat Calculator, and compare the result in Scrap Gold Calculator.

The 9ct gold price per gram formula

Start with the current 24K gold price per gram in pounds sterling, then multiply it by 0.375. That is the theoretical metal value of one gram of 9ct gold before any buyer deductions. If your source quotes gold per troy ounce, divide the ounce price by 31.1035 first.

For example, if pure gold were £80 per gram, the fine-gold content of one gram of 9ct would be worth £30: £80 × 0.375. This is an illustration, not a current quote. Use the calculator with today’s price and GBP for a live estimate.

For an item, multiply that 9ct gram value by the item’s gold-only weight. A 6 gram ring at the illustrative rate would have a £180 melt value before stones, non-gold parts or commercial deductions.

What the 375 hallmark means

UK jewelry often expresses fineness in parts per thousand. A 375 stamp means 375 parts of every thousand are fine gold, equivalent to 37.5% or 9 carat. It does not mean the item weighs 375 grams or has a fixed cash value.

A full British hallmark can include a sponsor or maker mark, a 375 fineness mark, an assay-office symbol and sometimes a date letter. A simple 375 stamp is useful evidence, but a mark alone is not proof: damaged, imported and counterfeit items may require testing.

Keep anything marked GP, GEP, HGE, RGP, GF or gold plated out of a solid-gold calculation. Those terms describe a surface layer or bonded layer and cannot be valued as 9ct throughout.

Weighing 9ct jewelry correctly

Use a scale that reads to 0.01 gram on a hard, level surface. Group pieces by hallmark before weighing, because combining 9ct and 18ct in one total creates an inaccurate average unless each group is entered separately.

The gross weight may include gemstones, enamel, watch movements, steel springs and base-metal clasps. Do not damage a wearable piece to remove them, but expect a professional buyer to estimate or subtract non-gold weight.

Hollow chains and bangles are still valued by weight, not visual size. A large hollow item may contain less gold than a smaller solid piece, which is why scale weight and verified purity matter more than appearance.

Why UK buyer quotes are below the calculated value

Melt value is a benchmark, not a guaranteed payout. A buyer must verify the alloy, aggregate material, insure it, send it to a refiner and leave room for possible refining loss and business margin.

Compare quotes as a percentage of the same melt value. A £240 offer against a £300 calculation is 80%. This makes different pricing styles easier to compare than headline claims such as “best prices paid.”

Ask which spot price and weight the buyer used, whether stones were deducted, and whether the quote includes all fees. Get at least three like-for-like quotes before selling a meaningful lot.

When a 9ct piece may be worth more than scrap

Brand, age, craftsmanship, condition and gemstones can add value beyond gold content. Signed jewelry, intact antique hallmarks, unusual period designs and complete sets deserve a jewelry appraisal before being placed in a scrap lot.

For ordinary broken or unbranded pieces, melt value is the clearest baseline. Photograph the marks, record the weight and calculate each purity group before asking a buyer to test it.

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