<Tr> <Td> </Td> <Td> ≈ </Td> <Td> 0.833 </Td> <Td> imperial cups </Td> </Tr> <Tr> <Td> </Td> <Td> ≈ </Td> <Td> 8.33 </Td> <Td> imperial fluid ounces </Td> </Tr> <P> A customary "cup" of coffee in the U.S. is usually defined as 4 fluid ounces, brewed using 5 fluid ounces of water . Coffee carafes used with drip coffee makers, such as Black and Decker models, have markings for both water and brewed coffee, since the carafe is also used for measuring water prior to brewing . A 12 - cup carafe, for example, has markings for 4, 6, 8, 10, and 12 cups of water or coffee, which correspond to 20, 30, 40, 50, and 60 fluid ounces of water or 16, 24, 32, 40, and 48 fluid ounces of brewed coffee, respectively, the difference being the volume lost to evaporation during brewing . </P> <P> Australia, Canada, New Zealand, and some other members of the Commonwealth of Nations--being former British colonies that have since metricated--employ a "metric cup" of 250 millilitres . Although derived from the metric system, it is not an official metric unit . </P>

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