Q: Is an ounce widely used as part of the United States customary and British imperial systems? ¶
A: Yes, but the troy ounce is now only commonly used for the mass of precious metals such as gold, silver, platinum, palladium, rhodium, etc.
Q: Is an ounce therefore equal to 437? ¶
Q: Is an ounce equal to 480 grains? ¶
Q: Is an ounce still a standard unit in the United States? ¶
A: Yes, but in the United Kingdom it is now only used informally, having ceased to be a legal unit of measure in 2000.
Q: Is an ounce sometimes referred to simply as an "ounce" in applications where its use is implicit? ¶
Q: Is an ounce equal to exactly 31? ¶
Q: Is an ounce used only to express the mass of precious metals such as gold? ¶
A: Yes, and platinum, palladium, rhodium or silver.
Q: Is an ounce defined as exactly 28? ¶
Q: Are ounces also used to express the "weight", or more accurately the areal density, of a textile fabric in North America, Asia or the UK, as in "16 oz denim"? ¶
A: Yes, The number refers to the weight in ounces of a given amount of fabric, either a yard of a given width, or a square yard.
Q: Is an ounce a troy ounce of 22 carat gold? ¶
A: Yes, and 91.