Gold Value Calculator

How the Gold Value Calculator Works

The gold value calculator runs two sums, not one. The first is melt value: what the gold in your hand would be worth if it were refined into pure metal. The second is the buy price: what Gold King Bullion pays for it today. Keeping those apart solves most of the confusion around selling gold.

Melt value starts with weight. Gold is quoted per troy ounce everywhere in the world, and a troy ounce is not the ounce on a kitchen scale. One troy ounce is 31.1035 grams, or 20 pennyweights, so 31 grams is just under a troy ounce and a 20-pennyweight chain is exactly one. The calculator converts whichever unit you enter into troy ounces before it does anything else.

Next comes purity. A karat is 1/24 of the whole, so 14-karat gold is 14 parts gold and 10 parts alloy, or 58.3% gold. Melt value is weight times fineness times spot price. A 10-gram 14-karat ring holds 5.83 grams of gold, whatever the ring weighs with its stones and solder included.

The second sum applies our published buy price for that karat: per gram, per ounce and per pennyweight. That figure sits below melt value for reasons set out further down. Melt tells you what the metal is worth. The buy price tells you what a transaction looks like today.

Karat, Fineness, and What the Stamp Actually Means

The gold value calculator uses the standard karat conversions below, the same figures an assay office works from.

Mark	Gold content	Parts per 1,000
24k	100%	1,000
22k	91.7%	917
18k	75.0%	750
14k	58.3%	583
10k	41.7%	417
9k	37.5%	375
8k	33.3%	333

Two details catch people out. First, 14-karat is not half of 24-karat; it is 58.3%, so a 14-karat piece is worth more than half its 24-karat equivalent. Second, the calculator treats 24-karat as pure, while real 24-karat bullion is usually 99.9% fine. At a $3,937 spot that one-tenth of a percent is about $3.94 an ounce: negligible on a chain, worth knowing on a bar.

A stamp is a claim, not a measurement. The FTC's jewelry guides require karat marks to be accurate, and reputable dealers still verify before paying. Solder, repairs and worn clasps can pull real fineness below the mark, which is why we test with X-ray fluorescence rather than reading the stamp and guessing. You can read about how electronic gold testing works before you come in.

Grams, Pennyweights, and Troy Ounces: Getting the Weight Right

Weight errors cost more than karat errors, because they are easy to make and hard to notice. A postal scale that rounds to the nearest gram can be 2% out on a 25-gram bracelet, and much worse on a ring. Use a scale that reads to 0.1 gram, weigh the piece as it is, then weigh it again without any stones that will be removed before refining.

Unit	Equivalent	Where you see it
1 troy ounce	31.1035 grams	Spot prices, bullion bars and coins
1 pennyweight (dwt)	1.5552 grams	US estate jewelry, older chains and charms
20 pennyweights	1 troy ounce	Jewelry lots and scrap bags
1 gram	0.643 dwt	Modern jewelry, most European pieces

Pennyweight still appears on American jewelry tags and estate inventories, so the gold value calculator gives you a column for it. If your scale reads grams and a buyer quotes pennyweights, convert before comparing, not after.

Worked Example: An 18.4-Gram 14-Karat Chain

Take a 14-karat rope chain weighing 18.4 grams. Using the gold value calculator's table as the page rendered it on 2 November 2026, with gold at $3,937.00 an ounce, the work runs in three steps.

1. Gold content: 18.4 g × 58.3% = 10.73 grams of fine gold.
2. Melt value: 10.73 g × $126.58 a gram (spot divided by 31.1035) = $1,358.60.
3. Buy price: 18.4 g × $59.04 a gram for 14-karat = $1,086.34.

The gap is $272.26, roughly 20% of melt. It is refining, assay, the risk of holding metal while the price moves, and the dealer's margin. That order of magnitude is what you should expect from any honest buyer at this price level.

Worked Example: 2.6 Pennyweight of 10-Karat Rings

Now two 10-karat wedding bands weighing 2.6 pennyweights together. Same date, 2 November 2026, and the same $3,937.00 spot. Feed those weights into the gold value calculator and the arithmetic is short, because the table already carries a pennyweight column.

1. Melt value: 2.6 dwt × $82.02 a pennyweight = $213.25.
2. Buy price: 2.6 dwt × $65.67 a pennyweight for 10-karat = $170.74.

The 10-karat melt figure is lower than the 14-karat one because it holds 41.7% gold instead of 58.3%. The percentage gap between melt and buy price barely moves. Karat changes the size of the number; the spread changes much more slowly.

Worked Example: An 8.2-Gram 22-Karat Bracelet

High-karat pieces are where sellers most often underestimate. An 8.2-gram 22-karat bracelet, on the same 2 November 2026 table at $3,937.00 spot, returns this.

1. Melt value: 8.2 g × $116.03 a gram at 91.7% fineness = $951.44.
2. Buy price: 8.2 g × $93.09 a gram for 22-karat = $763.34.

Put that bracelet on a scale that reads 8 grams and you would quote $18.62 low before anyone mentions karat. Weight unit and scale resolution matter as much as the stamp.

Melt Value vs. Offer: Why the Two Numbers Differ

Melt value is theoretical. Nobody pays it to a walk-in seller, because turning jewelry into .999 fine metal costs money and takes time. A refiner charges for the melt and the assay, a dealer carries the price risk between buying and selling, and the business needs a margin to stay open. Any buyer who says otherwise is either misinformed or leaving something out.

What you should insist on is transparency about the size of the gap. A fair quote names the karat the buyer tested, the weight in grams or pennyweights, the per-gram price applied, and whether stones were deducted. If a number arrives with none of that behind it, ask for the breakdown. The gold value calculator exists so you can run that comparison before you walk in.

Compare price per gram for the same karat, never totals across different weights. Two quotes for a 12-gram chain and an 18-gram chain tell you nothing until both are reduced to dollars per gram.

What the Gold Value Calculator Cannot Price

The gold value calculator prices gold content, and nothing else. That leaves out diamonds and colored stones, watch movements, silver or platinum settings, base-metal springs and clasps, and hollow pieces whose interior is mostly air. Gold-filled, gold-plated and vermeil items carry a thin layer of gold over another metal, so their melt value is a fraction of a solid piece the same size.

Numismatic coins are a separate case. A pre-1933 US gold coin holds a known amount of gold, but its collector value can exceed melt by a wide margin, and melting it would destroy that value. That premium is invisible to the gold value calculator. If you are unsure which category a piece falls into, bring it in rather than guessing, and read how our cash-for-gold process works first.

Checking Today's Gold Price Before You Sell

The table was current when this page was rendered, and gold does not sit still. Spot has moved from roughly $3,900 to $3,950 an ounce in recent sessions, a 1% swing that is real money on a 20-gram chain. Before you rely on any figure from the gold value calculator, check the live number on our gold spot price page, or call Gold King Bullion at (602) 648-7777 for today's per-gram buy price at your karat.

For an independent benchmark, the London Bullion Market Association publishes the twice-daily LBMA Gold Price that most of the trade settles against. It is not a live tick, but it is the number institutions use, and comparing it with a dealer quote shows whether the spread you are offered is ordinary.

Frequently Asked Questions About Gold Value

Is the calculator's number what I will be paid?

The buy-price column is what Gold King Bullion pays at the karat and weight you entered, on the pricing the page was rendered with. Melt value is the higher, theoretical figure. If the two look far apart, check the karat and unit you selected first.

Why is 14-karat worth more than half of 24-karat?

Because 14/24 is 58.3%, not 50%. The alloy metals carry almost no value, but the gold share is well above half. The same logic puts 10-karat at 41.7% of pure gold, which often surprises sellers in the other direction.

Does the gold value calculator account for stones?

No. The gold value calculator prices the gold you tell it about. Stones, movements and non-gold findings are removed before weighing or deducted after testing, so a ring with a large diamond weighs more than the gold it prices. Our FAQ covers the pieces that need a hands-on look rather than a formula.