How Do You Convert Troy Ounces to Kilograms?
Multiply troy ounces by 0.0311035 to get kilograms. The formula is: Kilograms = Troy Ounces x 0.0311035. Since 1 troy ounce = 31.1035 grams and 1 kilogram = 1,000 grams, the ratio is 31.1035 / 1,000.
Tom Brewer researches gold ETFs for his investment club. One share of a major gold ETF represents 1/10 of a troy ounce. The fund holds 25 million troy ounces. Converting: 25,000,000 x 0.0311035 = 777,588 kilograms (about 778 metric tons). He notes this is about 17% of the Fort Knox reserve, stored in bank vaults across London and Zurich.
Gold Bar Weight Reference
| Troy Ounces | Kilograms | Product |
|---|---|---|
| 1 ozt | 0.031 kg | Standard bullion coin |
| 5 ozt | 0.156 kg | 5-ounce bar |
| 10 ozt | 0.311 kg | 10-ounce bar |
| 32.15 ozt | 1.0 kg | Kilo bar |
| 100 ozt | 3.11 kg | 100-ounce bar |
| 400 ozt | 12.44 kg | Good Delivery bar |
| 1,000 ozt | 31.10 kg | Large institutional bar |
| 32,150 ozt | 1,000 kg (1 tonne) | One metric ton of gold |
Practical Applications
Central Bank Reserves
Maya Singh researches monetary policy for an economics class. The US gold reserve is 261.5 million troy ounces x 0.0311035 = 8,133.5 metric tons. Germany holds 3,352 tons, Italy 2,452 tons, and France 2,437 tons. She creates a chart showing how gold reserves compare to GDP and finds that smaller economies like Switzerland have the highest gold-to-GDP ratios.
Mining Production
Priya Patel writes about a gold mining company. Annual production is 750,000 troy ounces = 23,327.6 kg = 23.33 metric tons. At $2,100/ozt, annual revenue is $1.575 billion. She explains that moving 10 million tons of ore to extract 23 tons of gold gives a ratio of about 0.75 grams of gold per ton of rock.
Vault Storage
Sam Okafor tours a precious metals storage facility. The vault contains 2,000 Good Delivery bars at 400 ozt each = 800,000 ozt = 24,883 kg. Gold density is 19.3 g/cm3, so 24,883 kg occupies only 1.289 cubic meters — roughly a cube 1.09 meters on each side. He is amazed that $1.68 billion of gold fits in a space smaller than a refrigerator.