Troy Ounce vs Standard Ounce: the difference
Stop making the mistake between 28.35g and 31.10g during your transactions.
The troy ounce (symbol: ozt) is the standard unit of measurement for precious metals on world markets. It weighs exactly 31.1035 grams. This is the basis of the LBMA or COMEX price.
The avoirdupois ounce, used in common trade in the United States and the United Kingdom, weighs 28.3495 grams — which is 9.7% less. Confusing the two on a transaction of 1kg of gold represents an error of CHF 1,200.
The tola is the traditional unit of South Asia (India, Pakistan, Emirates) and weighs 11.6638g. Five tolas make 58.319g, slightly less than 2 troy ounces. Very common in transactions for inherited jewelry.
Quick Conversion: 1 troy ounce = 31.1035g = 2.666 tolas = 480 grains. Use the converter below for all instant conversions.