Fluid Ounce Article Index for
Fluid 		Website Links For
Fluid 		 

Information About

Fluid Ounce
  CATEGORIES ABOUT FLUID OUNCE
   
units of volume
   
ounce
   
customary units in the united states
   
imperial units
   
APPAREL
BABY
BEAUTY
BOOKS
CAR TOYS
CELL PHONES
DVD'S
ELECTRONICS
GOURMET FOOD
GROCERIES
HEALTH & PERSONAL
HOME & GARDEN
JEWELRY
MUSIC
MUSIC INSTRUMENTS
OFFICE PRODUCTS
SOFTWARE
SPORTING GOODS
TOOLS & HARDWARE
TOYS
VIDEO GAMES
SHOPPING HOME
MORE SHOPPING...




DEFINITION


The two types of ounces have slightly different definitions:


  • The U.S. fluid ounce is defined to be 1/128 of a U.S. gallon or 1/16 of a U.S. pint, about 1.804 cubic inches or 29.57 milliliters. This volume of cool, pure water weighs about 1.04 avoirdupois ounces (29.5 g).

  • U.S. regulation 21 CFR 101.9(b)(5)(viii) also defines a fluid ounce as exactly 30 ml, but this is for use in nutrition labeling only.2 These two definitions, one using English units and one metric, are not meant to concur exactly and are a common source of confusion.


In either system, the unit is often abbreviated as fl. oz., '''oz. fl.''', or '''fl oz'''. In the USA, it is common to refer to the unit simply as an "ounce", especially in cases where no confusion can occur with the unit of weight.


ETYMOLOGY


The word ''ounce'' derives originally from a word meaning "one" (originally "one" twelfth part of a Troy Pound ) Definition of ounce , from the Merriam-Webster online.. The word ''unit'' is also derived from the same original word, ''unus'' (one). [http://www.m-w.com/dictionary/unity In effect, the phrase "fluid ounce" is essentially equivalent to "liquid unit".


REFERENCES




SEE ALSO