According to Johns Hopkins Medicine, a seven-month-old baby should have 30 to 32 ounces of formula per day. Typically, this is fed to the baby across three to five feedings.
In addition to formula, Johns Hopkins recommends that seven-month-old babies have a variety of soft foods every day. Three to five tablespoons of single grain iron-fortified cereal should be mixed with formula. Two to three tablespoons of plain strained fruit and of vegetables should be offered twice daily. Two times a day, babies should eat one to two tablespoons of strained meat or other protein food. Babies are allowed four to six ounces of juice from a cup, as well as a few snacks, such as arrowroot cookies, toast or crackers.