How many packets of sugar make up 40 grams? Of course, not every packet of sugar is the same, but a little research of the published nutritional information from fast food restaurants in the United States revealed that a packet contains about 4 grams of sugar, and those 4 grams of sugar have 15 calories. This means that there about ten packets of sugar in a can of regular soda, accounting for the 150 calories. That’s a lot of sugar!