There are a lot of different ounces, including: avoirdupois ounce (mass, except precious metals and medicine) Troy ounce (mass, precious metals only: gold, silver, platinum) apothecary ounce (mass, medicine) US fluid ounce (volume) UK fluid ounce (volume) ounce force (engineering, probably an avoirdupois at some particular gravity)
12 troy ounces = 1 troy pound 12 apothecary ounces = 1 apothecary pound 16 avoirdupois ounces = 1 avoirdupois pound 16 US fluid ounces = 1 US liquid pint 20 UK fluid ounces = 1 imperial pint Finally, the Latin root of ounce is "uncia," meaning a twelfth. Note that the more common ounces are 1/16ths and 1/20ths. On Thursday 11 March 2004 22:36, Predrag Lezaic wrote: > I have been using this site > http://www.sciencemadesimple.net/EASYweight.html to convert grams > -ounces etc but was surprised when I had a choice between troy or > avoirdupois ounces. What the heck is this? Like one is not complicated > enough. It turns out that products that I am importing from europe are > using avoirdupois conversio. > > Thanks, > Predrag
