Originally Posted by Joanne
I can't measure in cups cos, well basically, I have no idea what a cup is (I live in the UK and I'm pretty sure we don't use cups).
Thanks for your help.
Ok, Joanne. You've opened a real can of worms here.
I have discussed this with Kreeli in a previous thread.
First off, it is incorrect/misleading to say that you do not use cups in the UK at the present time. The fact of the matter is that it is that it is illegal
to use "cups" or other "English" measures in sale or trade in the UK. You must use metric, or you can be charged with a crime
. The Common Market, and all that! This is a part of George Orwell's dark prophecy that did come true. The horror! The horror!
Second, even assuming we could turn the clock back 20 years when it was still legal to use the "English" system in the UK (note the major irony here), there is another aspect to the problem. The British (also known as the Imperial) gallon was/is 4.5459631 (metric) litres, whereas the US gallon is 3.785306 litres. That is, the US gallon is only about 83 percent the size of the British/Imperial gallon.
Now, despite the above, the US still uses the "English" measuring system, which means 4 quarts to the gallon, two pints to the quart, two cups to the pint--hence 16 cups to the gallon. But since the British/Imperial gallon is not the same as the US gallon, accordingly, the British/Imperial cup is 0.2841227 litres, or 284 mL, while the US cup is 0.2365816 litres, or 237 mL. Again, only about 83 percent as big.
Third, what I have told you is the exact truth. Yet there are those who find this all too complicated, so they will misrepresent the truth and tell you that a "cup" is 250mL, exactly 1/4th of a litre. Isn't that convenient? If only it were true.
Fourth, the above only applies to liquid measures. Also, there are other types of "cups"--for example, coffee cups and breakfast cups. The standard measuring cup in the US measures 8 fluid ounces, but coffee cups are usually 5 fluid ounces. So, if you buy a 4 cup coffee maker, it will make 20 fluid ounces of coffee, not 32.
Fifth, fluid ounces are also different in the US vs. Britain. There are 160 fluid ounces in the Imperial gallon, but only 128 in the US gallon, and these ounces are not equal either. 8 ounces to the US cup, 10 ounces to the Imperial/British cup.
Have I succeeded in confusing you yet?