How Much Formula Does My Baby Need?

AngelaRD, LDN, CBS

Read time: 4 minutes

What should I know about how much formula my baby needs?

  • Understand how to estimate about how much formula your 0 to 6 month old needs per day

  • Learn about how formula needs change after 6 months of age

  • Know how hunger and fullness cues are an important part of how much formula your baby drinks

When it comes to feeding your baby, responding to your baby’s hunger cues and feeding on demand is best. But as parents we often want more specific guidance, especially when it comes to how many ounces of formula we should be feeding our baby each day. How much is enough? How much is too much? Let’s set the record straight.

Learning Center - More info on formula

How much formula for babies ages 0 to 6 months?

During the first 6 months when solid foods are not yet in the picture, there’s a simple rule of thumb to help figure out how much formula your baby needs:

Start with offering 2.5 ounces of formula per pound of body weight each day.1,7

Remember that your baby may periodically take more or less than this amount depending on their hunger and growth spurts.

Here is an example for a baby who weighs ten pounds:

  • 10 pounds x 2.5 ounces = 25 ounces total per day

To figure out the number of ounces per bottle, divide total ounces per day by the number of feedings your baby has in a day.

If your baby feeds 8 times per day, you would divide 25 by 8, which comes out to a little over three ounces per feeding:

  • 25 ounces total per day / 8 feeding times per day = 3.12 ounces per feeding

Read more: 

Everything You Need to Know About Preparing and Storing Infant Formula

Preparing Formula: What Type of Water Should I Use?

How much formula for ages 6 to 12 months?

Once your baby reaches six months of age, complimentary solid foods are introduced.2 You may find that they naturally take a little less formula as they get closer to 1 year.3 This is normal!

Just remember, formula and/or breastmilk should remain the primary source of nutrition, with solid foods secondary to that, up until your baby is one year old.4

Read more: Introducing Solids: First Foods and Textures

Want to make sure your baby is drinking the right amount of formula? Ask our Happy Experts, who are registered dietitian nutritionists and infant feeding experts, for free. Chat now!

Average formula amounts based on baby’s age


Number of feedings per day

Amount of formula per feed

Birth-1 week


2-3 ounces

1 week-1 month


2-4 ounces

1-3 months


4-5 ounces

3-6 months


6-7 ounces

6-9 months


7-8 ounces

9-12 months


7-8 ounces


*Note that The American Academy of Pediatrics suggests babies should not be drinking more than 32 ounces of formula per day.1  If you notice your little one is taking in more than this, reach out to your pediatrician to discuss.

Formula feeding tips

Follow your baby’s hunger and fullness cues to know how much formula they need

Keep in mind, each baby is different and the above formula amounts are just averages. Babies’ appetites may change, just as ours do! Your baby may eat more or less on any given day.

By responding to your baby’s hunger cues (sucking on hands; opening and closing mouth; rooting) and fullness cues (starts and stops the feeding often; unlatching or spitting out the nipple; fidgets and is distracted; closes mouth), you will likely be giving your baby exactly what they need.9

Read more: Understanding Your Baby’s Hunger and Fullness Cues: Responsive Feeding

Try paced bottle feeding

This method of bottle-feeding helps prevent overfeeding by putting your little one in control and allowing them to eat exactly how much they need.10 

With a few simple steps, a slow-flow nipple, and a bit of practice, paced bottle feeding will come naturally to you and your little one. Read about how to do it here: What is Paced Bottle Feeding?

How will I know baby is getting enough formula?

Your baby’s weight gain is the most important sign that your baby is getting enough formula. You’ll also want to look at diapers to know how your little one is doing.

For a newborn, look for 5 or more wet diapers and at least 1 dirty diaper per day. An older baby may have 5 or more wet diapers per day along with 1 dirty diaper every day or even every 2 to 3 days.11 Remember that every baby has a different stooling pattern, so just watch your little one’s pattern and be aware when it changes.

Read more: 

Feeding Tips for Healthy Weight Gain in Babies and Toddlers

How Can I Relieve Constipation for My Baby and Toddler?

Let’s Chat!

We know parenting often means sleepless nights, stressful days, and countless questions and confusion, and we want to support you in your feeding journey and beyond.

Our Happy Experts are a team of lactation consultants and registered dietitian nutritionists certified in infant and maternal nutrition – and they’re all moms, too! They’re here to offer personalized support on our free, one-on-one, live chat platform Monday through Friday, from 8am–6pm ET. No appointment needed, no email or sign-up required. Chat Now!

Read more about the experts that help write our content!

For more information on this topic, check out the following articles:  

Should I Formula Feed On Demand or on a Schedule?

How do I Supplement my Breastfed Baby with Formula?

Choosing the Best Bottles and Nipples for my Baby

Should I Switch my Baby's Formula?