how much ounce or gram in an IO cup ?

[catshanon]

Originally Posted by zoaElite

The number of grams varies in a cup due to particle size, for salt its around 292g per cup. 1 Cup also equals 8 ounces, I'm kind of confused what your asking though.

What I am asking is that if I just have a bucket of salt, how much will I need to make a gallon of water of standard SG. IO says 1/2 cup, but that is irrelevant to me as I don't know how big of a cup to use. Hence I am asking for the metric amount that a cup holds. If I know the gms or ounce, then I can measure it out.