Precious Metals & Currency Converter
Real-time bullion valuation for Gold, Silver, Platinum, Palladium, and Copper across troy ounces, grams, carats, and pennyweights, coupled with universal multi-currency foreign exchange calculations.
Gold Purity Valuation Breakdown (1 oz t)
| Grade / Karat | Purity | Pure Content | Melt Value (USD) |
|---|---|---|---|
| 24K | 99.9% | 31.072 g | $2,497.50 |
| 22K | 91.6% | 28.491 g | $2,290.00 |
| 18K | 75.0% | 23.328 g | $1,875.00 |
| 14K | 58.5% | 18.196 g | $1,462.50 |
| 10K | 41.7% | 12.970 g | $1,042.50 |
| 9K | 37.5% | 11.664 g | $937.50 |
Engineering Guide: Troy Weights, Karats & Bullion Metallurgy
The Difference: Troy Ounce vs. Standard Ounce
In precious metals and precious gemstones, mass is measured in the Troy system, inherited from the medieval French trade city of Troyes.
- 1 Troy Ounce (oz t) = exactly 31.1034768 grams
- 1 Avoirdupois Ounce (oz) = approximately 28.3495 grams
- 1 Troy Ounce = 1.09714 standard ounces (9.7% heavier)
- 1 Kilogram = 32.1507 Troy Ounces
Gold Karat (kt) Calculation Formula
The karat rating measures the ratio of pure gold to alloy elements in 24 parts:
For silver, fineness is described as parts per thousand (e.g. 925 parts pure silver and 75 parts copper for Sterling Silver).
Recommended Handbooks & Professional Tools
Auto-RotatingEssential high-yield reference standards and hardware for engineers
Machinery's Handbook (31st Edition - Toolbox Edition)
by Erik Oberg, Franklin D. Jones
The 3,000-page ultimate manufacturing & mechanical engineering reference.
AISC Steel Construction Manual (16th Edition)
by American Institute of Steel Construction
The official code manual for structural steel design, member tables & specifications.