Approx 250gm per cup. So 1 and 3/5 cups in 400 gm.
http://wiki.answers.com/Q/How_many_cups_is_in_400_...

There are 28.349 grams in an ounce and 8 ounces in a cup, so 400 grams in cups would
http://www.chacha.com/question/whatisis400gram...

A cup is approximately 8 ounces, and there are 28.34 grams in an ounce. Once you know this information, doing the math necessary to work out how many grams are in a cup is easy. 28.34
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