How Much Is 18K Gold Worth? Real Melt Value Today

What does the 750 stamp actually guarantee?

It guarantees a ratio and nothing else. 750 means 750 parts gold per thousand — 75% by weight, which is 18 parts of 24, which is 18 karat. The stamp says nothing about weight, nothing about craftsmanship, and nothing about whether the piece is worth more assembled than melted.

You will see the same purity expressed as 18K, 18KT, or 0.750 depending on where the piece was made. European makers overwhelmingly use 750. American makers use 18K. Swiss watch cases use 750, usually stamped inside the caseback alongside a maker's mark and a case number. All of them mean the identical alloy for valuation purposes.

The remaining 25% is what gives 18K its color and its working hardness. Copper and silver for yellow, extra copper for rose, palladium or nickel for white. None of it affects melt value — a refiner pays on the gold fraction, and 18K rose and 18K white settle at exactly the same rate per gram.

What matters far more than the color is whether the stamp is followed by letters. 750 GP, 18K GF, 18K HGE and RGP are plating and filling codes describing items that are mostly base metal. A gold-filled piece carries roughly 2–3% gold by weight; treating it as solid 18K overstates its value by an order of magnitude. Our gold hallmarks guide decodes the whole vocabulary, stamp by stamp.

What is a gram of 18K worth right now?

The arithmetic is short enough to do standing at a counter. Spot gold is quoted per troy ounce, and a troy ounce is 31.103 grams, so:

spot price ÷ 31.103 × 0.75 = 18K value per gram

Use a clean assumed price of $4,400 per troy ounce, which sits comfortably inside the $4,300–$4,500 band gold has traded near recently. Divide by 31.103 and pure gold is $141.46 per gram. Multiply by 0.75 and 18 karat gold is $106.10 per gram.

That is the number to carry. From there, the other units fall out immediately: a pennyweight of 18K (1.555 g) is $164.98, a standard avoirdupois ounce (28.350 g) is $3,007.94, and a full troy ounce of 18K metal is $3,300.00 — which is exactly 75% of $4,400, as it must be.

Because spot moves every session, treat $106.10 as a reference point rather than today's truth. Gold moving from $4,300 to $4,500 shifts 18K from about $103.69 to $108.51 per gram — a swing of nearly $5 on every gram you own, which on a 100-gram estate lot is roughly $480. That is why the calculator above reads a live price instead of a hardcoded one, and why a printed chart from last spring is fine for the purity column and useless for the dollar column.

What does a large lot come to? A 171-gram example

The most useful version of "how much is 18K gold worth" arrives with a specific weight attached — someone has an estate lot on a scale and wants a real number rather than a rate. So let us run one properly.

171 grams of 18K gold, which is a little under five and a half troy ounces of metal, at our assumed $4,400/oz price:

171 g × $106.10 = $18,142.95 melt value

That figure represents the gold content and nothing more. It assumes the full 171 grams is solid 18K — no stones, no steel clasps, no watch movements, no enamel. Every gram of non-gold in that pile has to come off the top before the number means anything.

Now apply the market. Nobody pays 100% of melt, because refining, assay, shipping, insurance and profit all come out of the same pot. Using the payout ranges that hold across the industry, the realistic offers on that lot spread out like this:

• Online refiner at 70–90%: $12,700 – $16,329
• Local coin or bullion dealer at 65–85%: $11,793 – $15,422
• Jewelry store at 50–75%: $9,071 – $13,607
• Pawn shop at 40–60%: $7,257 – $10,886

Best realistic offer to worst realistic offer on the same 171 grams: a spread of roughly $9,071. That is not a rounding error or a negotiation nuance — it is half the value of the lot, decided entirely by which door the seller walks through first. Three quotes on a lot this size is not diligence, it is arithmetic. We rank the buyer types in detail on where to sell gold and break down the percentages on what percentage do gold buyers pay.

What is your specific weight worth?

Rather than make you do the multiplication, here is the lookup. All figures assume 18K at $106.10 per gram, derived from gold at $4,400 per troy ounce. Find the row nearest your weight, or interpolate — the relationship is perfectly linear.

Two cautions on reading this table. First, these are melt values — the ceiling, not the offer. Multiply by 0.4 to 0.9 depending on the buyer to get a realistic payout, and see how much below spot should you sell gold for where in that band you should be aiming.

Second, the weight has to be gold weight. A 25-gram bracelet with a steel spring clasp and four commercial-grade stones is not 25 grams of 18K, and the buyer will not pretend otherwise. Weigh, deduct, then look up. How to weigh gold covers doing this properly with a $15 scale.

Why is an 18K watch case such a reliable trap?

This deserves its own section because it is the single most common way people overestimate an 18K holding, and the error is usually in the thousands.

A gold watch is not a gold object. It is a gold *case* attached to a movement made of brass, steel and jewels, often with a steel caseback, a sapphire or mineral crystal, steel spring bars, and — on integrated bracelets — links that may be gold, may be steel, or may be alternating. Put the whole watch on a scale and multiply by $106.10 and you will produce a number that no buyer on earth will honor.

Run the real math instead. Say a vintage dress watch weighs 52 grams complete on the head, and the seller reasons: 52 × $106.10 = $5,517.15. But once a watchmaker removes the movement, dial, hands and crystal, and once the steel caseback is set aside, the actual 18K content — case, bezel and gold buckle — comes to 31.0 grams.

31.0 g × $106.10 = $3,289.07

The seller's estimate was $2,228 too high, and nobody lied to anybody. The weight was simply never gold weight.

A few things to check before you assume any watch case is solid 18K:

• Look inside the caseback, not on the outside. Solid gold Swiss cases are stamped 750 or 0.750 internally, usually with a helmeted-head or fineness punch and a case number.
• "Fond acier" or "acier" means steel back. Very common on mid-century gold-cased watches — the front is gold, the back is not, and only the gold portion counts.
• Gold-capped, plaqué, laminated and 20-micron cases are not solid gold. A "plaqué or G20" mark means a measured plating thickness, not solid metal.
• Test the bracelet separately. Gold head on a steel bracelet is an extremely common combination.

And the most important rule, which overrides all of the above: if the watch runs and carries a recognized name, do not scrap it. A working Rolex, Patek, Omega, Cartier or Vacheron in a gold case is worth a large multiple of its metal, and melting it is the most expensive mistake available in this entire subject. Get a specialist quote first. Metal value is the floor beneath a watch, never the price of one.

What will a buyer actually hand you?

18K is desirable scrap. High purity means better recovery per batch, so clean, sorted 18K parcels tend to sit toward the upper end of each buyer type's range — but only if you make buyers compete for them.

The hierarchy holds consistently: online refiners pay roughly 70–90% of melt, local coin and bullion dealers 65–85%, jewelry stores 50–75%, pawn shops 40–60%, and the mail-in services that advertise heavily as little as 20–50%. The variable that moves you within a range is not charm — it is parcel size, sorting quality, and whether the buyer knows you have another quote in your pocket.

Four practices that measurably improve outcomes:

1. Weigh everything yourself first, in grams, and write it down. A seller who states the weight before the buyer does is very hard to short-weigh.
2. Ask for a price per gram of 18K, never a lump sum for the bag. A lump sum is designed to be incomparable.
3. Never let mixed karats onto one scale. A pile of 18K priced as 14K loses about 29% of its value silently. Sort by stamp first; the karat gold calculator prices each pile separately.
4. Treat a refusal to explain the formula as a no. Any legitimate buyer can tell you their spot reference, their purity assumption, and their payout percentage in one sentence.

Before mailing anything to a remote buyer, the FTC's guidance on selling gold jewelry is a genuinely useful ten minutes — it covers what reputable mail-in operations disclose about appraisal, insurance and returning your items if you reject the offer.

When is 18K worth far more than its gold?

18K is the house karat of the luxury trade, which makes this question more pressing here than at any other purity. A meaningful share of 18K items are worth substantially more intact than melted, and the melt figure is only the correct benchmark once you have ruled that out.

The categories worth checking, in rough order of how often people get them wrong:

Signed jewelry. Cartier, Van Cleef & Arpels, Bulgari, Tiffany, Boucheron, Buccellati. A signature next to the 750 stamp changes the entire calculation. Search sold listings for your specific model, then get a quote from a jewelry reseller or auction consigner before any scrap buyer sees it.

Watches, as covered above — the largest single category of avoidable loss.

Antique and period pieces. Victorian, Edwardian, Art Deco and mid-century modernist work with a legible maker's mark often carries collector demand that melt value ignores entirely.

Anything with box and papers. Original packaging and documentation can add meaningfully to resale and nothing at all to melt.

A refiner is buying an ingredient. A collector is buying an object. If your piece is an object, do not sell it as an ingredient.

Where none of that applies — an unbranded chain, a single earring, a bent bangle, a dated setting nobody wants — melt value is the honest floor, and the calculator above is your negotiating baseline rather than an aspiration. If the item came from an estate, note that inherited gold has its own cost-basis and tax considerations; the IRS treats gold as a collectible, and Topic 409 is the starting point. This is general information rather than tax advice — a large inherited holding is worth a professional's hour.

How do you avoid the three most expensive mistakes?

When people ask how much is 18K gold worth and end up unhappy with the answer they got at a counter, the cause is almost always one of three errors — and all three are cheap to prevent.

Mistake one: weighing non-gold as gold. Stones, steel clasps, spring bars, watch movements, enamel, cord and rhodium-plated base-metal findings all read on a scale and none of them pay. Remove or estimate them before you calculate. This is the error behind the watch-case example above and behind most of the disappointment at the counter.

Mistake two: mixing karats on one scale. 18K at $106.10 per gram weighed alongside 14K at $82.52 and priced as one pile is a guaranteed loss, and it happens through sloppiness at least as often as through malice. Sort, weigh separately, price separately. If you have 14K in the same drawer, how much is 14K gold worth gives you that pile's number.

Mistake three: accepting the first offer. The 171-gram example above showed a $9,000 spread across buyer types on identical metal. There is no version of this transaction where one quote is enough, and no legitimate buyer is offended by being told you are getting others.

One more that does not quite make the podium but costs people regularly: assuming a fake stamp is a real one. 18K commands real money, which makes it worth counterfeiting, and plated brass wearing a crisp 750 mark is common. A magnet test costs nothing, an acid kit costs about $20, and an XRF scan at a coin dealer takes seconds — how to tell real gold from fake runs through them in order. Verify the metal, then run it through the gold calculator, then go shopping for quotes. In that order, the number you end up with is one you can defend.

Frequently Asked Questions