How many grams of sugar are in a cup?

There are 201 grams of granulated white sugar in one cup. Other sugars convert differently. If a person is using powdered sugar, also called confectioner's sugar, there are 128 grams in one cup. If one cooks with packed brown sugar, there are 220 grams in one cup.

Two hundred one grams of granulated white sugar are equivalent to 7.1 ounces. One hundred twenty-eight grams of confectioner's sugar (powdered sugar) convert to 4.5 ounces, and 220 grams of packed brown sugar weigh 7.75 ounces. The conversion rates to remember are that one ounce equals 28.34 grams and that one gram equals .035 ounces.