How Much Should Baby Eat?


I have a 5 1/2 month old baby, I feed him twice a day, in the morning he eats about 2 tablespoons of cereal. In the evening he eats 1/4 to 1/2 cup of vegies or fruits. His weight is in the 50th percentile, but he looks thin. How much a baby his age must eat?

Dr. Greene's Answer

Msfho, I speak with parents all over the world who express concern that their babies are eating too little – or too much. Some parents think that 90th percentile is an ‘A’ and 80th is a ‘B’. If their baby is at the 50th percentile, they are concerned that something is wrong. But healthy babies come in many shapes and sizes. The 50th percentile is a wonderful weight, sometimes called the target weight. Half of the healthy baby boys at that age weight more, half weigh less.

If he is taller than average, a more useful measure of his growth is the weight-for-length percentile (or for older children, the BMI percentile). Whatever you look at, keep in mind that (if he is in the healthy range) most of us would rather be on the slim side of healthy.

I understand that feeding our babies is a core part of our role as parents that we deeply want to know that we are doing it right.

Comments by friends, relatives, or strangers can heighten our concern: “He barely eats a thing. You need to feed him more.” “What a chubby baby!” “He looks so skinny. Are you feeding him enough?”

This preoccupation led to “scientific” guidelines of how many teaspoons of what type of food to offer, and how often. We now understand, though, that babies’ needs differ, and that the same baby may have different needs depending on what is happening on a particular day. Rigid guidelines can be counterproductive.

Children need ever-changing amounts of food, influenced by their activity level and developmental phase, the air temperature and relative humidity, and perhaps by a virus they might have.

How is a parent supposed to decide how much to feed?

At 5 ½ months, most of the nutrition still comes from breast milk or formula. The solids provide wonderful experience with flavors, textures, and the mechanics of eating.

A baby can breastfeed as much as he wants, or have about 20 to 32 ounces of formula per day. In addition, he can have as much or as little in the way of healthy solids he wants to supplement this.

Thankfully, babies are born with a sophisticated internal mechanism for determining just how much they need to thrive. Healthy babies given the right selection of healthy foods will tend to eat just the right amount (as long as we don’t short circuit this with empty calories in what they eat or drink).

Our role as parents is to offer healthy foods and to learn to recognize their signals and not to short-circuit our babies’ own sense of how much they need.

Independent toddlers might make it easy for us by saying “all done” or using hand signals to indicate, “I’m finished!” Before they have those skills, babies will use their whole bodies to get the message across, fidgeting in the high chair, or even standing up.

The signals of younger babies are quieter. A newborn may push the nipple out of the mouth, or just fall asleep. A baby who has entered the delightful stage of first solids will lean forward or open the mouth when hungry, and clench the mouth shut, turn aside, or lean back when satisfied. When babies get better at using their hands, they might push the spoon away.

There are several ways to tell if our dance of communication is working well. A bright, happy child is a good sign. Babies who aren’t getting enough to eat tend to be irritable or droopy (of course many other things can make them unhappy). Babies should make urine regularly. If they don’t urinate in 8 hours, it bears looking into. And throughout childhood, their growth will be plotted at each regular check-up to be sure that they are growing on target for themselves.

Too much food creates a bloated feeling. Too little leaves craving. But just right – the baby feels deeply satisfied. What joy to be able to give this pleasure to our babies and to watch them grow! After all, growth is what childhood is all about.

Last medical review on: October 03, 2009
About the Author
Photo of Alan Greene MD
Dr. Greene is a practicing physician, author, national and international TEDx speaker, and global health advocate. He is a graduate of Princeton University and University of California San Francisco.
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Recent Comments

hi! my baby is 9 months old but she still don’t know how to eat solid food. is it normal? how can i practice her to eat solid food?


This is an important time for your baby to learn to love great foods. Do you know why she isn’t eating solid foods? Does she reject a spoon? Or spit food out that you feed her?

If she’s rejecting a spoon, you might try offering her age-appropriate finger foods. She might enjoy picking up bits of banana or cheerios.

If that doesn’t work, talk to your pediatrician who might refer you to a feeding specialist. But don’t wait long. Once she hits a year old, it may get much harder.


My four month old is gaining weight and growing consistently since birth; always within the 75th percentile. However, she still eats the same amounts as when she was a few days old: roughly 16 to 18 ounces total of formula or pumped breast milk in a 24 hour period – never more than 2.5 ounces per feeding, which occurs about 8 to 10 times in 24 hrs. She is now a little over 15 pounds, so the “rules of thumb” indicate she should be eating at least twice what she eats now. I don’t get it. Her pediatrician is not worried and gave us the go-ahead to start rice cereal. Is this of concern? Is she indeed eating too little?