18ct Gold Price

18ct Gold Price per Gram UK Today

Use our 18ct gold price calculator to check the price per gram and estimate the value of your jewellery. Also known as 18k or 750 gold, 18ct gold contains 75% pure gold. First, use the live pricing below as a starting point. Then, enter your item's weight in the calculator.

However, the figures shown are indicative. Your confirmed offer follows an assessment of your items' weight and purity; the calculator does not guarantee a payout.

18ct Gold Price Estimate Calculator

To begin, enter the weight in grams and select 18ct in our 18ct gold price calculator to calculate an estimated value. Also, check the update time shown with the prices, as market rates can change between your enquiry and valuation.

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Then, you can review our offer before deciding whether to sell. If you are unsure of an item's purity or weight, contact our team rather than guessing. For the wider market reference, see our live UK gold price in GBP.

What Do 18ct, 18k and 750 Mean?

18ct and 18k describe the same gold purity: 18 parts gold out of 24, or 75%. The remaining 25% consists of other metals. Similarly, the fineness number 750 means 750 parts gold per thousand. These terms describe purity, rather than the weight or price of an item.

First, look for marks inside a ring, on a pendant back or near a necklace clasp. For example, a readable mark can help you choose the appropriate calculator setting. However, marks do not replace an assessment, particularly where an item has worn markings or replacement parts.

For more information, read our guide to gold hallmarks or the Birmingham Assay Office's gold hallmarking guide.

How to Use the 18ct Gold Price Calculator

Our 18 carat gold price calculator uses the weight and purity you enter. For a useful estimate, follow these steps.

1. Identify your items. Make a list of the rings, chains or other pieces you want to value.
2. Check the purity. Select 18ct only where you have a reasonable basis for that choice.
3. Enter the weight. Use grams and calculate items of different purities separately.
4. Review the estimate. Record the weight, selected purity, date and result before comparing offers.

For example, a 9ct chain and an 18ct ring need separate calculations. Applying the 18ct rate to both would overstate the estimate. Likewise, check whether your scales include the weight of stones or other non-gold components.

How to Calculate the Value of 18ct Gold

To calculate an estimate manually, multiply the eligible weight of the 18ct gold alloy by the quoted 18ct rate per gram:

Estimated value = eligible alloy weight in grams × 18ct rate per gram

Because an 18ct rate already accounts for the metal's purity, no further purity adjustment is needed. Therefore, do not multiply the result by 75% again. Otherwise, you would apply the purity adjustment twice and understate the estimate.

Example Values for Different Weights

These examples use the same indicative 18ct rate shown above: £70.22 per gram. They estimate metal value, not a guaranteed buying offer. Exclude stones and non-gold parts from the weight.

Alternatively, use the 18ct gold price calculator above with your own weight and the displayed market pricing.

Why Your Final Offer May Differ

A calculator works with the details you provide. However, it cannot establish an item's purity or eligible metal weight remotely. Instead, your confirmed valuation follows inspection and testing, using the applicable buying rate.

Stones and Non-Gold Components

For example, stones, watch movements and non-gold fittings can contribute to an item's total weight. However, they should not automatically be valued at the 18ct gold price. For example, a stone-set ring weighing 10g does not necessarily contain 10g of 18ct alloy.

In addition, home scales provide only a starting point. Therefore, ask which weight is used in your offer and how it differs from your measurement. Avoid dismantling jewellery or removing stones simply to weigh the metal.

Purity and Market Movements

Testing may identify a different purity from the one selected in the calculator. In addition, market prices can change before your items arrive. For this reason, keep a record of your estimate so you can discuss any difference with the assessor.

When comparing rates, distinguish the underlying metal value from a buyer's payable rate. In other words, a spot-price benchmark does not automatically represent the amount a seller will receive.

How We Assess Your Items

First, we assess weight and gold content before making an offer. Our gold testing service uses X-ray fluorescence, or XRF, to help identify the metals present in an alloy.

If a result differs from your expectations, ask us to explain the assessment before accepting. You can also ask what testing involves, particularly if preserving an item's appearance matters to you.

Compare the 18ct Gold Price and Final Payment

First, check that competing estimates use the same weight and purity. Then, compare the amount you would actually receive, rather than the headline price alone.

• What buying rate per gram applies?
• What weight is included in the valuation?
• Are there any fees or deductions?
• How long is the offer available?
• When is payment arranged, and what happens if you decline?

Also, check postal insurance and return arrangements before sending anything. As a result, these details help you compare the complete service alongside the quoted rate.

Selling Broken or Unwanted Jewellery

For example, a snapped chain, damaged bracelet or single earring can still contain valuable gold. Explore our pages on selling gold rings, gold necklaces and scrap gold for more information.

However, metal value may not capture an item's antique, designer or collectable value. If that might apply to your piece, consider a specialist jewellery valuation before choosing how to sell.

Request Your Free Selling Pack

Once you have checked the 18ct gold price and reviewed your options, complete our free insured pack request form. We assess your items and provide an offer for you to consider.

Alternatively, contact our team with questions. You can also access our tools through the Sell My Gold app on Apple or Android.