Scrap Gold Calculator
Add matching scrap-lot weights and karat values in one common weight unit, then apply an entered spot price and payout percentage. Melt value and estimated payout remain separate.
How to use this calculator
Enter matching scrap weights, non-metal exclusions, and any karats through 24, plus unit, spot price, currency, payout percentage, and fixed fee.
Review assay, stones, solder, plated or filled items, scale unit, price timestamp, refining loss, minimum lot, payment terms, and buyer spread.
Read pure grams, pure troy ounces, theoretical melt value, and estimated payout.
Formula
For each lot, fine gold = (gross weight − entered non-metal weight) × karat ÷ 24. Payout = max(0, total melt value × payout percentage − fixed buyer fee).
Worked example
20 g of 14-karat scrap contains 20 × 14 ÷ 24 = 11.667 g fine gold before assay and buyer deductions.
Assumptions and limits
- The item is treated as homogeneous at its entered karat; only an assay and buyer terms can establish actual payable gold.
- Scrap Gold Calculator treats the entered values as estimates and does not infer missing project, account, or personal details.
- Calculations retain working precision except where the cited method requires an intermediate rounding step; displayed values are then formatted separately. Source rules and dated rates must be rechecked when they change.
Sources
- LBMA: Precious Metal PricesGold benchmark price context. Reviewed 2026-08-14.
- National Institute of Standards and Technology: SI Units — LengthLength, area, volume, and unit-conversion conventions. Reviewed 2026-08-14.
- National Institute of Standards and Technology: Precious Metals Conversion InformationOfficial formula or method source used by this calculator. Reviewed 2026-08-14.
- Federal Trade Commission: Buying Platinum, Gold, and Silver JewelryOfficial formula or method source used by this calculator. Reviewed 2026-08-14.
- Commodity Futures Trading Commission: 10 Things to Ask Before Buying Physical Gold, Silver, or Other MetalsOfficial formula or method source used by this calculator. Reviewed 2026-08-14.
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Verification
How this calculator is checked
Trust comes from reproducible evidence, not model confidence. You can inspect the formula, assumptions, worked example, and cited sources on this page.
- Versioned calculationFormula logic is kept separate from the interface and covered by automated registry and behavior checks.
- Cited evidenceSources linked for independent checking: 5.
- Transparent AI useAI may assist drafting or adversarial review. Agreement between models is not proof, and no human expert review is claimed unless a named reviewer is shown.
Frequently asked questions
How does the Scrap Gold Calculator work?
For each lot, fine gold = (gross weight − entered non-metal weight) × karat ÷ 24. Payout = max(0, total melt value × payout percentage − fixed buyer fee).
What information should I enter in the Scrap Gold Calculator?
Enter matching scrap weights, non-metal exclusions, and any karats through 24, plus unit, spot price, currency, payout percentage, and fixed fee, then verify assay, stones, solder, plated or filled items, scale unit, price timestamp, refining loss, minimum lot, payment terms, and buyer spread.
What should I verify before using this Scrap Gold Calculator result?
The item is treated as homogeneous at its entered karat; only an assay and buyer terms can establish actual payable gold.
Last updated 2026-08-25 · multi-item-net-payout-v2 · content-2026-08-14 · Published by YunFanLabs