The weight of a bowl of rice is about100g, while 20 grams of rice is equivalent to 20 grams, which is about 1/5 of that of a bowl of rice. The size of the bowl and the thickness and tightness of the rice will affect the weight and volume of a bowl of rice. The volume of a normal bowl is 150ml, and that of a bowl of rice is about 100g, which is equivalent to 100g in grams of rice, and that of rice is about one bowl.