Scrap Gold Calculator - Net Scrap Value Estimate

A scrap gold calculator estimates the metal value of unwanted gold from its weight, purity, the per-unit gold price, and an optional flat refining fee. Use it when sorting old jewelry, broken chains, dental gold, coin leftovers, or an inherited lot and you want a planning number.

• • Pricing a mixed jewelry lot: Run the calculator for each purity band and add the net values to size up the whole box.
• • Comparing a per-gram offer: Enter the local per-gram or per-pennyweight price the buyer quoted, so the result matches the offer format.
• • Estimating a mail-in kit return: Add the assay and refining fee the kit provider publishes, then compare the net scrap value with the promotional check.
• • Sanity-checking a coin or bar: Verify a quoted bullion price per troy ounce matches the scrap value after purity, before accepting a buy-back offer.

Scrap gold is gold that has to be melted and refined before it can be used again. That covers broken jewelry, single earrings, dental crowns, off-color coins, and other items where the practical path is a refiner. The value is driven by the fine gold content, not the original retail price.

The result is a planning number for the metal alone. It does not include retail markup, brand value, gemstones, designer premiums, craftsmanship, tax, or shipping. A buyer may pay less than the calculated value because the refiner covers labor, testing, shipping, fraud risk, and margin.

If you also want a buyer-payout estimate in the same lot, the gold melt calculator applies a payout percentage to a similar melt calculation.

The scrap gold calculator mirrors the same five steps a refiner follows: weigh the lot, translate the karat or assay report into a purity fraction, isolate the pure gold, multiply by a per-unit market price, and subtract any flat fee.

• Weight in selected unit: The entered weight in grams, troy ounces, pennyweights, or standard ounces.
• Purity fraction: Karat divided by 24, or custom purity percent divided by 100.
• Price per selected unit: The gold price in the same unit as the weight, such as dollars per gram.
• Refining fee: An optional flat assay or refining fee subtracted from the gross metal value.

Karat is a purity ratio, not a weight unit. A 14K item is modeled as 14 parts gold out of 24, so only part of the gross weight becomes pure gold. The remaining alloy can include copper, silver, nickel, zinc, or palladium, and has no separate value in a scrap sale.

The price input is flexible. If a refinery quotes dollars per pennyweight, choose pennyweights and enter that per-dwt price. The math stays in the same unit end to end.

According to NIST, one troy ounce equals 31.1034768 grams and equals 20 pennyweights for precious-metals pricing.

According to FTC Consumer Advice, 18K gold is 18 parts gold mixed with six parts another metal, which supports modeling karat purity as karat divided by 24.

If the per-unit price is quoted in a different currency than the offer, convert it first with the currency converter calculator so the result matches what you would actually be paid.

Four ideas drive the result: fine weight, karat purity, price-per-unit quoting, and the flat refining fee. Changing any one of them changes the net scrap value in a different way.

Do not mix jewelry weight and fine-gold weight when reading a buyer's worksheet. A 14K bracelet that weighs 20 grams does not contain 20 grams of gold. The fine-gold estimate is closer to 11.67 grams before assay tolerance and solder are considered.

The custom purity field handles hallmarks such as 916, 750, or 585 and assay reports that state a percentage. Enter 91.6 or 91.7 for many 22K-style references, 75 for 18K, or the percent on a reliable certificate.

For a paper exposure to gold rather than physical scrap, the futures contract calculator models notional value and margin on the same metal.

Run one calculation per purity band when you have a mixed lot, then add the net scrap values for a portfolio view. Use the same per-unit price for each band so the totals are consistent.

1. 1 Weigh the lot: Use a digital scale and read the weight in the unit you plan to quote in.
2. 2 Pick the matching unit: Select grams, troy ounces, pennyweights, or standard ounces so weight and price use the same unit.
3. 3 Set the karat or purity: Use the karat stamp, or choose custom purity for a fineness mark or assay report.
4. 4 Enter the per-unit price: Type the price in the same unit, such as dollars per gram, that you want the result to mirror.
5. 5 Add the refining fee if any: Enter the flat fee, or leave it at zero to compare the pure metal value with the offer.
6. 6 Review the outputs: Compare the net scrap value with the per-gram and per-troy-ounce results to see whether the offer lines up with the metal content.

Suppose you have 12 pennyweights of 18K chain at a quoted $55 per pennyweight and a $10 mail-in kit fee. Enter 12 dwt, 18K, $55, and $10. The net scrap value is the number to compare with the kit's promotional check, while the per-troy-ounce value shows the equivalent price per ounce of pure gold for a bullion comparison.

After the sale clears, the holding period return calculator can compare your original purchase cost with the net scrap value you actually received.

A scrap gold estimate is most useful when it turns a vague quote into numbers you can audit. The outputs help with selling, recordkeeping, and pricing discipline.

• • Works in the unit your buyer uses: Per-gram, per-troy-ounce, and per-pennyweight prices are all supported, so you do not have to convert offers before comparing them.
• • Shows the fee impact up front: Subtracting the refining or assay fee makes it easier to see whether a small lot is worth mailing in or better sold in person.
• • Separates metal from resale story: You can see what the gold content is worth before considering brand, condition, design, gemstones, or sentimental value.
• • Helps sort a mixed lot quickly: Run the calculator once per purity band, then add the net values to size up the whole bag or box in a few minutes.
• • Supports estate and insurance notes: Document the inputs, price, date, and source so an estimate is reproducible for records or appraisal support.

Use the per-troy-ounce equivalent to compare with a spot price or a bullion quote, and the per-gram number to compare with a local jewelry buyer. Many small shops quote per gram of 14K rather than per ounce of fine gold, and the calculator translates between the two.

Keep notes with the gold price, the date, the source, and the fee used. Gold prices move during the day, so an estimate from the morning can be stale by the afternoon.

If you are weighing the cash value of a sale against reinvesting the proceeds, the investment calculator shows the alternative growth path side by side.

The estimate changes when weight, purity, price, unit, or the refining fee change. Real transactions can also include details the scrap gold calculator cannot see.

• • The calculator assumes the selected purity applies to the entire entered weight. It cannot detect plating, filled jewelry, solder differences, or mixed-metal parts.
• • The result is not a live bid, appraisal, tax value, or firm sale quote. Confirm testing method, fees, payment timing, and the price source with the buyer or refiner.

If the lot contains gold-plated or gold-filled items, the entered purity overstates the gold content. An assay lab is the only way to recover that gold.

For taxes, estate, or insurance, document the price source and consider a qualified appraisal. A scrap gold estimate is a screening tool, not a substitute for professional testing.

According to LBMA, the London Bullion Market Association publishes benchmark precious-metal prices, so a scrap gold estimate should match the price unit and quote time of the comparison offer.

When you know what a buyer paid and what you originally paid, the percentage return calculator can measure the realized gain or loss on the lot.