Depending on what part of the world a gold bar is manufactured or the manufacturer’s preference, the weight unit a gold bar is weighed in can vary. In most nations where English is the first language, manufacturers usually will use the troy ounce as the unit in which gold is determined in. One troy ounce is equal to 31.1034768 grams. The troy ounce is distinct from the avoirdupois ounce which is 28.349523125 grams. The spot price of gold is what one troy ounce of gold is selling for at a given time.

Another unit which gold bars are weighed in is Grams. Gold bars that are weighed in grams can vary from one gram to a thousand grams (one kilo gold bar). Some of the most common sizes of gold bars that are manufactured in grams are 1, 2.5, 5, 10, 20, 50, 100, 250, 500, and one kilo. The next unit which gold bars are weighed in is Tolas. Some nations that use the tola to weigh gold are India, Pakistan, Bangladesh, Nepal, and Singapore. The tola was the weight of the silver rupee coin issued by the British East India Company. One tola is equal to 11.6638038 grams or 0.375 troy ounces.

One last unit which gold bars are weighed in is Taels. The tael was used in many eastern Asian nations and can vary from nation to nation or region to region. In China and Taiwan a tael is equal to 37.5 grams; in Hong Kong a tael is equal to 37.8 grams. Gold tael bars usually come in three shapes biscuits, doughnuts, and boat shape. The unit in which gold bars are manufactured and weighed in can vary from culture to culture, but thanks to the metric system gold bars can be compared a little easier.