How to Use Scrap Gold Calculator
The Scrap Gold Calculator estimates how much your scrap gold is worth. Enter the weight and unit, choose the karat, enter the current price per troy ounce, and add the refinery’s fee percentage. The Scrap Gold Calculator returns the pure gold content and a net payout estimate.
- Weigh the item in grams or ounces.
- Pick the karat (or custom purity).
- Enter spot price per troy ounce.
- Enter the refinery fee (commonly 10-30%).
Formula & Theory - Scrap Gold Calculator
The Scrap Gold Calculator uses:
grams = weight · unitFactor
pureGrams = grams · purity
pureTroyOz = pureGrams / 31.1034768
gross = pureTroyOz · pricePerTroy
net = gross · (1 - fee)| Symbol | Meaning |
|---|---|
| purity | 24K=1.000, 22K=0.917, 18K=0.750, 14K=0.583, 10K=0.417 |
| unitFactor | g=1, oz=28.3495, troy=31.1035 |
Assumptions and Limits
The Scrap Gold Calculator assumes the listed karat is accurate and that the buyer pays based on a stated percentage of spot. Actual offers vary by buyer and condition.
Use Cases for Scrap Gold Calculator
- Selling old jewelry - know your minimum acceptable offer.
- Estate cleanup - estimate gold totals across many items.
- Pawn shop comparison - check competing offers.
- Education - understand how purity affects price.