10K Gold Calculator
Price 10K gold from the weight on your scale. The karat is locked at 10, the lowest karat sold as gold in the United States.
10K gold value
1 troy oz = 31.1 g · 1 oz = 28.35 g · 1 dwt = 1.555 g
10K · 41.7%
Priced as 10 ÷ 24. The usual stamp is 417.
Common 10K weights
| Weight | Pure gold | Melt value |
|---|---|---|
| 1 g | 0.417 g | — |
| 5 g | 2.083 g | — |
| 10 g | 4.167 g | — |
| 20 g | 8.333 g | — |
| 50 g | 20.833 g | — |
| 1 oz | 11.812 g | — |
One piece at 10K, using the price above. 1 oz is the regular ounce (28.35 g), not a troy ounce (31.103 g).
Selling? See what buyers may pay for scrap gold.
Related karats
On this page
10K gold is 10 ÷ 24, which is 41.7% gold. The usual stamp is 417. In the US it is the lowest fineness that can legally be called karat gold.
10K is the US legal floor for the word “gold”
The Federal Trade Commission Jewelry Guides draw a line at 10 karat. An item under that fineness is not supposed to be described as karat gold in the United States. That rule is about naming, not about whether lower alloys exist. 9ct gold, standard in Britain and stamped 375, is 37.5% gold and is real gold. It simply sits under the American naming line. A US shop that calls a 9ct chain “10K” is rounding in the wrong direction. Price the stamp you can see.
Because 10K is the floor, it collects the jewelry that has to survive and still be affordable in a heavier weight. Class rings are the clearest case. A crest, a shank and a stone setting add up, and the ring is worn against desks, weights and steering wheels. The extra alloy in 10K makes that shape harder than the same shape in 14K. Mall chains, some men’s signets and a lot of children’s jewelry land here for the same pair of reasons: toughness, and less gold per gram so a chunky piece does not become a luxury purchase.
Less gold per gram is not the same as “not worth weighing”. A class ring of 12 to 18 grams is common. At 41.7% that is several grams of pure gold, enough that the melt value is worth knowing before a buyer names a figure. A dainty 10K bracelet of 2 grams is a different object. The calculator is locked at 10K so you can change the weight without the karat drifting upward to a more flattering number.
Why 10K looks paler and wears harder
Most of a 10K piece is not gold. The 41.7% that is gold gives the metal its value. The rest is copper, silver, zinc, nickel or a similar mix, and that mix is what you see and feel. Yellow 10K often looks brassy next to a 14K or 18K chain, because the copper is no longer a minority. White 10K is largely the color of the white metals, usually brightened with rhodium. When people say 10K “doesn’t look like real gold”, they are reacting to that alloy, not to a fake. The test is the stamp and, if you are selling, an assay.
Hardness is the useful side of the same alloy. Prongs on a class ring, the edge of an engraved crest, and a shank that is not very wide all hold up better in 10K than they would in 18K. The piece will still scratch. Those scratches do not lower melt value. A repair that left a blob of solder on the inside does, if the solder stays on the scale, because solder is not 10K. Stones are not 10K either. A class ring’s stone can be a real gem or a synthetic, and either way it should be off the gold weight.
Plated jewelry imitates this color on purpose. A brass chain with a gold-colored plate can look as yellow as 10K and weigh whatever the base metal weighs. The plate is too thin to price as 41.7% gold. If the only mark is GP, GEP, HGE or RGP, leave this page. If there is no mark at all, do not promote the piece to 10K because it “looks like class-ring gold”.
Where the 10K or 417 mark hides
On a class ring, look inside the shank, away from the engraving of the school and the year. The karat mark is small and it is often next to the maker’s name. “10K” and “417” are the two forms. 417 parts per thousand is 41.7%. Ten divided by 24 is 41.67%, so the struck mark is the rounded fineness and this calculator uses the karat formula. The gap is a sliver. It will not explain a buyer who offers half of melt. It can explain two careful quotes that differ by a fraction of a percent.
Chains hide the mark on the clasp. Bracelets hide it on the plate or the fold-over clasp. Earrings hide it on the post or the butterfly, which is sometimes a different metal from the earring face. Read the part you are weighing. A 10K face on a steel post should not be priced as if the post were gold.
10K GF is gold-filled, not solid. The fraction in front of it, often 1/20 or 1/10, is the share of the item’s weight that is the gold layer, and that layer itself is only 10K. Solid 10K and 10K gold-filled are different calculations. This page is the solid one. Quantity on the calculator is for matching pieces, such as a pair of solid cuffs, not for counting a plating thickness.
A 12 gram class ring at the live price
Twelve grams is a realistic class ring once the stone is not being counted as gold: heavy enough to feel like the rings people keep in a drawer, light enough that it is not a championship ring loaded with side stones. Use your own scale if you have the ring in your hand. The line below prices 12 grams of 10K at the calculator’s price, and it puts the same weight in 9K and in 14K beside it so the neighbours are in money, not only in percent.
The worked example uses 12 gram 10K class ring and fills in from the price in the calculator.
That figure is melt. A buyer paying “seventy percent of melt” is not disagreeing with the karat. They are taking a share for testing, refining and their business. Check any offer against the scrap gold calculator, which keeps typical refiner, jeweler and pawn ranges next to the melt value. Come back here if you only wanted the 10K ceiling.
The units are the same four used on the rest of the site. One pennyweight is 1.55517384 g, and US jewelers often weigh scrap in pennyweights. One troy ounce is 31.1034768 g. One regular ounce is 28.349523125 g. A kitchen scale set to ounces is the regular ounce. Pricing those ounces as troy ounces overstates the gold by about 9.7%.
10K against 9ct and against 14K
9K, written 9ct in Britain, is 37.5% gold. 14K is 58.3% gold. Same weight, the pure gold in 10K is 10/9 of the pure gold in 9ct, about 11% more, and 10/14 of the pure gold in 14K, about 29% less. A heavy 10K ring still beats a light 14K chain whenever 10/24 of the ring’s grams is greater than 14/24 of the chain’s grams. Do that comparison with the two calculators rather than with a rule of thumb about which karat is “the good one”.
| Karat | Percent | Stamp | Pure gold in 10 g |
|---|---|---|---|
| 9K / 9ct | 37.5% | 375 | 3.75 g |
| 10K | 41.7% | 417 | 4.17 g |
| 14K | 58.3% | 585 | 5.83 g |
Ten grams times 10 ÷ 24 is 4.17 grams of pure gold. The table is that arithmetic for three karats. It is not a price. The dollar value moves with the quote in the calculator, and it should, because freezing a price into this paragraph would be wrong by the next market session.
Retail is a third number, and for class rings it is often far above melt because you paid for the school crest, the stone and the labor. Years later, as scrap, the crest is just 10K metal. Knowing both numbers keeps a low scrap offer from feeling like an insult and a high scrap offer from feeling like a windfall you cannot check. Odd stamps that are not 10K, 417, 9ct or 14K belong on the gold karat calculator, which is the purity converter for the whole chart. Anything you would rather price with the karat left open belongs on the gold calculator.
10K Gold Calculator questions
Is 10K real gold?
Yes. 10K is 10 parts gold out of 24, which is 41.7% gold. In the United States it is the lowest karat that the Federal Trade Commission Jewelry Guides allow a seller to call karat gold. Anything below that can still contain gold, but it should not be sold under a karat-gold name. 9ct, which is common in Britain, sits just under that US line.
What does a 417 stamp mean?
417 means 417 parts gold per thousand, or 41.7%. Ten divided by 24 is 41.67%, which is 416.7 parts per thousand, and the struck mark is 417. This calculator uses 10/24. You will also see the stamp written as 10K. Both belong on this page.
Why are class rings often 10K?
A class ring is worn every day, often for years, and it is usually heavier than a fashion band. 10K is harder than 14K because more of the weight is alloy, so the crest and the shank hold up. The lower gold percentage also keeps the price of a heavy ring in reach. A 12 or 15 gram class ring can still contain several grams of pure gold. Weight is doing as much work as the karat.
Does 10K look like gold?
It looks paler than 14K or 18K. Yellow 10K can look brassy because of the copper in the alloy. White 10K is mostly the color of the white metals, often with a rhodium plate. If a “10K” piece looks like bright new yellow gold and has no stamp, do not assume the karat. Plated jewelry is finished to look richer than it is.
Is a light 10K chain worth less than a heavy 14K chain?
Almost always, yes, but do the multiplication. Pure gold weight is total weight times 10/24 for 10K, and times 14/24 for 14K. A 20 gram 10K chain holds about 8.3 grams of pure gold. A 8 gram 14K chain holds about 4.7 grams. The heavier 10K piece wins. The calculator is here so you do not have to guess from the stamp alone.
How close is 10K to 9ct?
10K is 41.7% gold. 9ct, the British mark, is 37.5% gold and is stamped 375. The same weight of 10K has 10/9 the pure gold of 9ct, about 11% more. They are neighbours, not the same alloy. A UK piece marked 9ct or 375 belongs on the 9K page, even if an American buyer describes it loosely as “about 10K”.