How Much Does a Gold Bar Weigh? Gold Bar Size and Weight.

They are all the same meaning for a long bar of precious metal bullion. The names can be applied to various other metals, but normally refer to gold and silver bullion bars. A "Bar" can actually be the technical term used when referring to a standard Good Delivery bar. Commonly a "bar" refers to a shape of a bullion product which has its mass (weight) and purity stamped on the material. A 'Biscuit" is the name given to thinner cast bars, sometimes also referred to as wafers. An "Ingot" is a common description given to the shape of a piece of cast metal. It can refer to non-precious metals as well as bullion, and usually retains the shape of its original cast.

The world's largest gold bar stands at 250 kg (551 lb), measuring at the base 45.5 cm × 22.5 cm and 17 cm high with a 5-degree draft angle (equal to 15,730 cm³, or 17.9 in × 8.9 in × 6.7 in ≈ 1062.04 in³)

The standard gold bar that's held and traded internationally by central banks and bullion dealers is known as the 'Good Delivery' bar. It typically weighs in at 400 troy ounces (27.5 pounds), and measures 7 inches x 3 and 5/8 inches x 1 and 3/4 inches, however dimensions and weights can vary between different institutions and uses.

You can get started with our free investors guide. Most gold bars weigh one troy ounce. Other common sizes are 5 oz, 10 oz gold bars, and 1 kilo gold bars (32.15 troy oz)

The avoirdupois system is a standard for measuring weight based on there being sixteen ounces in a pound. There are approximately 14.583 troy ounces in an avoirdupois pound (Avoirdupois ounce = 14.583 troy ounces. Precious metals are always quoted in troy ounces (31.1 grams), as opposed to the standard avoirdupois ounce of 28 grams.

• Protons/Electrons: 79
• Atomic Mass/weight: 196.96u
• The gravity of gold / Density: 19.32 grams per cubic centimeter (Twice as dense as silver)
• Number of Neutrons: 118

COMEX bars range between 95-105 oz based on purity. The most common is 100 oz size at a .9999 purity and is known as the standard for the North American gold futures market. Therefore, each $1 move in the price of gold translates into a $100 change in the value of the gold futures contract.

This is an easy test for any bar that comes from an accredited mint like Perth, Credit Suisse or RMC. The exact weight is stamped into the bar and should weigh EXACTLY that. There are criminal offenses for misrepresenting the weight on a gold bar so if it weighs anything else, you've found a fake. Make sure your scale is balanced before running this test. It is also best to follow this test with a density test to find if the precious metal is throughout the bar or coin.

An assay is a type of metal analysis used to measure the purity of a certain metal. Typically used to ensure that coins or bars produced by the refiner to reach the purity standards of the manufacturer. Once meeting the standards, i.e. .999 pure or .9999 pure, the metals can be stamped or poured into silver or gold bars and coins. Mints will send their products in individually sealed plastic assay cards to certify the assay is still accurate even after changing hands and sellers.