Originally from http://gramcup.com/grams-to-cups-conversion/
- For brown sugar, it also differs from the rest. I cup is the same as 220g and same as 7.750z.
- Salt is added to almost any food which is been cooked to add taste and for healthy purposes since when it is iodized, it prevents goiter. Have ever asked yourself it measurement? Let me break it down for you. 2 table spoons are equivalent to 40 grams which is the same as 1.4 oz. a cupful is 300 grams or 10.71 oz.
- Butter is another essential ingredient in our foods and it measures as follows: 2 table spoons are equivalent to 30 grams. A cup is 240 grams
More at Sugar, salt and butter