According to Pepsi, there are 69 grams of sugar in a 20-ounce bottle of Pepsi. When converted, that is about 13.8 teaspoons of sugar in each 20-ounce serving.
There are 48 teaspoons in a cup, which means that there is almost ? cup of sugar in every 20-ounce serving of Pepsi. Comparatively, there are 24 grams of sugar in a chocolate bar, or almost two-thirds less. The World Health Organization recommends that no more than 10 percent of total daily calories be derived from sugar. For an average adult, that is about 25 grams of sugar per day, or about 44 grams less than what is contained in a single 20-ounce Pepsi.