Troy Weighting System
The troy weighting system was originally used in Troyes in France to measure the weight of precious metals such as gold and silver. The troy ounce (t oz / ozt) is today the only measure of the troy weighting system that is still in use.
- 1 troy ounce (t oz / ozt) = 31.1034768 grams
- 1 troy ounce (t oz / ozt) = 0.0311034768 kilograms
- 1 troy ounce (t oz / ozt) = 480 grains
- 1 grain = 0.06479891 grams
Don’t confuse a troy ounce with a standard (avoirdupois) ounce…
A troy ounce is about 10% heavier than a standard (avoirdupois) ounce. When the silver price is advertised or said to be $30 per fine ounce in the market place, the ounce is in reference to a troy ounce which is equal to 1.09714286 standard (avoirdupois) ounces.
- one troy ounce (t oz / ozt) = 1.09714286 ounces
- 0.911458333 troy ounce (t oz / ozt) = one ounce (oz)