Baby Feeding Calculator
Enter your baby's weight and age for an estimate of how much formula they need per day and per feed. Based on the AAP rule of thumb for formula-fed babies.
More in the feeding guides, including how to choose bottles and starting solids.
Feeding amount questions
- How much formula should a baby drink?
- The AAP rule of thumb is about 2.5 ounces of formula per pound of body weight per day, up to an average of about 32 ounces in 24 hours. So an 8-pound baby works out to roughly 20 ounces a day, split across feeds. It is an average, not a target, and your baby's appetite will vary day to day.
- How often should a newborn eat?
- In the early weeks, formula-fed newborns usually take 2 to 3 ounces every 3 to 4 hours, which is about 8 to 12 feeds in 24 hours. Feed on demand rather than by the clock, and wake a very sleepy newborn to feed if your pediatrician has advised it.
- How do I know my baby is getting enough?
- The reliable signs are steady weight gain, about 6 or more wet diapers a day once feeding is established, and a baby who seems content after feeds. The ounce count is a guide, not a rule. If you are unsure, your pediatrician can check growth at the next visit.
- Does this work for breastfeeding?
- No. Breastfed babies feed on demand and you cannot measure their intake in ounces. Offer the breast whenever your baby shows hunger cues, watch diapers and weight gain, and reach out to an IBCLC or your provider if feeding is painful or you are worried about supply.