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This article is about the unit of measure. Ounce is also another name for the snow leopard.

The ounce is the name for a number of different units of mass (oz), and, confusingly, fluid volume (fl oz). See Imperial system of units and U.S. customary units for more about the frameworks within which these units are defined.

  • avoirdupois ounce defined by the avoirdupois system of mass (see pound). There are 16 ounces in the avoirdupois pound. The avoirdupois ounce is approximately 28.3 grams.
  • troy ounce defined by the troy system of mass. In troy weight, there are 12 ounces in a pound, and a troy pound is 5760 grains (approx. 373.24 grams), rather than 7000 (approx 453.59 grams). Note: at roughly 31.1 g, the troy ounce is about 10% more than the more common avoirdupois ounce.
  • The fluid ounce unit of volume also exists in the two versions of 28.4 (Imperial) and 29.6 ml (U.S.).

The symbol for ounce is ℥

The Dutch term ons is a unit of mass that is considerably more, 100 grams.

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Last updated: 11-10-2004 19:38:55