Potatoes come in different sizes and weights. A normal size potato may weigh anything between 100 to 110 grams or less depending on the size of the vegetable as a singular unit. In many parts of United States and Ireland, a single potato can weigh up to 400 to 500 grams each. 74 to 75 % of the content of a potato is water and it is a good source of carbohydrates which measure up to 22.6 grams in each 100 grams of potato. The protein count of potatoes is, however, much less then any other vegetable that is only 1.6 % protein every 100 grams of potato. Potato intake can result in increase in blood sugar. When a potato is freshly dug, the Vitamin C and B content is as high as 30 milligrams per 100 grams.