Gold Bar Value Calculator

The value of a gold bar depends on its weight, purity, and the current spot price. A standard 1 oz gold bar at .9999 purity is worth exactly the spot price of gold. Larger bars like the 400 oz Good Delivery bar (what central banks hold) are worth over USD 1 million at current prices.

The 1 troy ounce gold bar is the most popular size for individual investors. For institutional investors and central banks, the 400 troy ounce Good Delivery bar is the standard. Smaller bars (1g, 5g, 10g) are popular as gifts and entry-level investments.

Gold bar purity indicates the percentage of pure gold in the bar. .9999 (four nines fine) means 99.99% pure gold. .999 is 99.9% pure. .995 is the minimum purity for London Good Delivery bars. The remaining fraction is typically trace amounts of silver, copper, or other metals.

Yes, physical gold bars always sell for a premium over the spot price to cover refining, minting, shipping, and dealer margins. Larger bars tend to have lower premiums per ounce (1-3%), while smaller bars carry higher premiums (5-15%). Buying larger bars is more cost-efficient per ounce of gold.

A troy ounce (31.1035 grams) is about 10% heavier than a regular ounce (28.3495 grams). All precious metals are measured in troy ounces. When you see gold prices quoted 'per ounce,' it always means per troy ounce.

For investment, look for bars from LBMA-accredited refiners like PAMP Suisse, Valcambi, Perth Mint, or Royal Canadian Mint. The 1 oz and 10 oz sizes offer the best balance of liquidity and low premiums. Always buy .999+ purity bars with assay certificates for maximum resale value.