Gold Analyzer (Grams) — Karat, Impurity & Live Value All-in-One
A gold analyzer is a one-screen valuation tool that takes a gross gram weight + karat purity and returns: pure gold content, alloy/impurity mass, purity percentage, hallmark fineness number (999/916/875/750), and the money value at the live international XAU/USD spot rate converted to 100+ currencies.
It is what scrap-gold dealers, pawnbrokers and jewellery valuers run for every piece walked into their shop. The full calculation in one number set means no back-of-envelope mental math at the counter.
All four outputs at once
Pure = Gross × (karat/24); Impurity = Gross × ((24−karat)/24); Purity % = (karat/24) × 100; Money value = Pure grams × (live XAU/USD ÷ 31.1035) × FX rate.
Sample conversions
| Input | Result |
|---|---|
| 20 g of 22K | Pure 18.33 g, Alloy 1.67 g, 91.67% pure, 916 fineness |
| 50 g of 18K | Pure 37.5 g, Alloy 12.5 g, 75% pure, 750 fineness |
| 100 g of 14K | Pure 58.3 g, Alloy 41.7 g, 58.33% pure, 583 fineness |
When to use this calculator
- Scrap-gold counter quotes
- Insurance appraisal
- Refiner intake estimation
- Pawn-loan calculation
Frequently asked questions
What does "fineness" mean compared to karat?
Fineness is parts per thousand. 916 fineness = 916/1000 = 91.6% pure = 22K. 999 fineness = 24K. Most modern jewellery hallmarks show fineness rather than the karat number.