Purity
21K gold is 21 parts gold out of 24: 87.5% fine gold, normally marked 21K or 875.
Gold spot price
$4,392.72 per troy ounce
$141.23 per gram of pure gold · $105.92 per gram of 18K
Figures show melt value — the market value of the recoverable gold content. They are not an offer, an appraisal, or investment advice. Buyers pay a percentage of melt that varies by business model.
21 karat · 87.5% pure
21K Gold Price & Calculator
See a live spot-based 21K gold price, calculate any weight, and understand exactly what an 875 hallmark means before you compare a jewelry quote or buyer offer.
Input
Weight & purity
Max input: 999,999 per item.
Pure gold
0.0000 oz
Price / oz
$4,392.72
Price / gram
$141.23
Formula: weight in troy ounces × karat purity × gold price per ounce. Dealer offers may be lower than this market-value estimate.
Live market estimate
Current 21K gold value in USD
21K / 875 fine · spot-based melt estimate
Loading live gold and exchange rates…
This is an international spot-based melt estimate, not an official local jewelry retail or buyback rate.
Calculated from XAU/USD spot and the selected currency exchange rate.
Open with these settingsPrice formula
21K value = fine-gold spot price × 0.875 × item weight after a correct unit conversion.
Best comparison
Compare melt value separately from workmanship, tax, stones, retail margin, and a dealer’s buyback deduction.
How to calculate 21K gold value
- 1Check the piece for a 21K or 875 mark, then confirm questionable or unmarked jewelry with a professional test.
- 2Weigh only the gold-bearing parts in grams, tola, pennyweight, or troy ounces.
- 3Select 21K so the calculator applies the 0.875 fine-gold ratio to the live or manual spot price.
- 4If you are selling, compare the 100% melt estimate with the buyer’s actual payment after all deductions.
To put this into practice, use Gold Karat Calculator, check the assumptions with Gold Price Per Gram, and compare the result in 22K Gold Calculator.
What 21K and 875 mean
Karat is a fraction of 24. Dividing 21 by 24 gives 0.875, so a 10 gram 21K item contains 8.75 grams of fine gold before any allowance for stones or non-gold findings. The millesimal mark 875 expresses the same purity as 875 parts gold per thousand.
A stamp is evidence, not a laboratory result. Repairs, solder, replacement clasps, plating, or counterfeit marks can change the recoverable content. Use a competent jeweler or refiner when the amount is material.
Worked formula without a stale price
Take the live 24K price per gram shown on the site and multiply by 0.875. Multiply that 21K gram rate by the item’s net gold weight. For example, a 12 gram piece contains 12 × 0.875 = 10.5 grams of fine gold; its melt estimate is 10.5 multiplied by the current pure-gold price per gram.
This page calculates from the current XAU/USD quote and, when needed, a live currency conversion. It does not freeze a dollar number into the article, so the method stays accurate when the market moves.
Melt value, retail price, and buyback price are different
A new-jewelry price can include design work, labor, tax, store overhead, and local premiums. A scrap buyer works in the opposite direction and may deduct assay, refining, risk, and margin from melt value. Neither number should be presented as if it were the spot value of the metal.
Ask for weight, tested purity, price basis, and every deduction in writing. That makes two offers comparable even when one dealer quotes per gram and another quotes a total.
Primary sources and further reading
- Federal Trade Commission — Jewelry Guides — US guidance on truthful precious-metal content representations.
- Bangladesh Jeweller’s Association — Gold Price — Primary market example publishing separate 21K and 22K hallmarked rates.
Common questions
How pure is 21K gold?
Exactly 87.5% by the karat formula. The remaining 12.5% is alloy metal added for color and durability.
Is 875 the same as 21K?
Yes. 875 is millesimal fineness; 21K is the same proportion expressed out of 24 parts.
Is the live number a guaranteed selling price?
No. It is a spot-based melt estimate. A real offer can be lower after testing, refining, non-gold weight, and margin.
Open the calculator
Enter weight, purity, currency, and payout percentage in the main tool.