A Cup is a measurement of capacity or volume, whereas a gram is a measure of mass (~weight).

Therefore, technically they can not be compared.

However, for water 280 g = 280 cm

One (metric) cup = 250 ml.

Therefore 280 grams of water = 1.12 cups.

Therefore, technically they can not be compared.

However, for water 280 g = 280 cm

^{3}= 280 ml.One (metric) cup = 250 ml.

Therefore 280 grams of water = 1.12 cups.