The amount of formula an 11-month-old should have varies from child to child but ranges between 24 and 40 ounces per day, according to BabyCenter. The sites recommends that children at this age take four or five bottles of 6 to 8 ounces of formula each day supplemented by healthy solid foods.
BabyCenter lists several signs that indicate whether or not a child is receiving the right amount of formula. These signs include consistent weight gain in a predictable pattern, a relaxed and satisfied disposition after feeding, and four to six wet diapers per day. Signs a child needs more formula include finishing the bottle quickly and looking around for more. The child's pediatrician is the best resource to answer any concerns about nutrition and weight.
The American Academy of Pediatrics presents a sample menu and feeding schedule for children from 8 to 12 months of age to help guide parents in making healthy feeding decisions. This menu suggests giving 4 to 6 ounces of formula at breakfast, lunch and dinner as well as one snack of 4 to 6 ounces and 6 to 8 ounces at bedtime. These formula feedings are supplemented by solid foods, such as cereal, fruit, vegetables, meat and cheese, at each meal.