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Mixed Karat Scrap Gold Calculator

Price a mixed scrap gold lot with multiple karats, multiple weights, and live melt-value subtotals in one calculation.

Calculate Your Gold's Value

Add each pile of scrap gold separately so every karat line is priced at its own purity before the lot total is combined.

⚡ Live Gold Price (per Troy Oz) Live Spot
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Estimated Mixed Lot Melt Value
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Lot Breakdown
Add at least one valid lot line before calculating.
Item AWeight × Purity+Item BWeight × Purity+Item CWeight × Purity
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Total Fine-Gold Content
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Combined Melt Value

Why Mixed Lots Need Their Own Calculator

Keep each weight and karat separate for a transparent lot total

Line-by-line purity wins

10K, 14K, and 18K do not share the same fine-gold fraction. Pricing each row separately prevents higher-karat pieces from being diluted inside a rough blended estimate.

Cleaner refiner negotiations

Refiners and local buyers quote faster when your lot is already sorted by hallmark. That reduces assay uncertainty and makes payout percentages easier to compare.

Better internal records

If you are liquidating estate jewelry, trade-ins, or a bench scrap bag, keeping karat-specific subtotals gives you a transparent audit trail for every line item.

Calculations use standard weight and purity formulas with live market spot prices. See our Calculation & Editorial Methodology for complete formula steps and limitation disclosures.

How to Sort a Mixed Scrap Gold Lot

Three practical steps before you ask any buyer for a quote

1
Group by stamp
Separate 417, 585, 750, 916, and 999-marked pieces into their own piles before you weigh anything.
If a piece is unmarked, isolate it instead of averaging it into a stamped pile.
2
Weigh each pile cleanly
Use grams, DWT, or troy ounces as needed, but keep every line item separate so the purity math stays accurate.
Remove stones, watch movements, and spring clasps first when they do not contain recoverable gold.
3
Compare against the total offer
Once the subtotals are combined, you have a realistic melt-value anchor for the entire lot.
That total is the right benchmark before you accept a refiner, jeweler, or pawn-shop quote. Learn how to calculate scrap gold value manually to see the exact formula behind each karat line item.

Frequently Asked Questions About Mixed-Karat Scrap Gold

Break the lot into separate karat lines, calculate each line at its own purity and weight, and then add the melt-value subtotals together.

Do not use a simple unweighted karat average. A correctly weight-adjusted purity can be mathematically valid, but valuing each row separately is clearer and reduces input mistakes.

Yes. Each row converts independently, so you can price grams, pennyweight, grains, and troy ounces in the same mixed lot.

Keep it out of the stamped piles. Unmarked pieces should be tested separately with acid, XRF, or a trusted jeweler before they are added into a lot total.

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