How Much Formula Should I Feed My Baby: A Newborn & Infant Formula Feeding Guide

Feeding your baby is one of the most critical and nurturing parts of early parenting. Whether you’re exclusively using infant formula or combining it with breast milk, one of the most common questions Australian parents ask is: “How much formula should I feed my baby?”

The answer depends on your baby’s age, weight, and feeding habits. In this guide, we break it down using millilitres (ml) to help you feel confident and informed.

How Often Should I Feed My Baby Formula? How Much Formula

Newborns and infants need to feed often, especially in the first few weeks. Most babies feed every 3 to 4 hours initially. As they grow, feeding intervals naturally stretch. (How much and how often)

• Newborn (0–1 month): 60–90ml per feed, 8–12 times a day
• 1–2 months: 120–150ml every 3–4 hours
• 2–4 months: 150–180ml every 4 hours
• 6 months and older: 180‒230ml every 4–6 hours

Every baby is different so that feeding needs may vary. Some will be hungrier more often, while others feed less frequently but take in more during each feed. Give your baby what they need.

How Much Amount of Formula Does Your Baby Need Daily?

A general rule is that babies require around 150ml to 200ml of formula per kilogram of body weight per day.

For example, a 4kg baby might need approximately 600ml to 800ml of formula per day. Spread this amount evenly across the day based on your baby’s feeding routine.

Look for signs that your baby is getting enough, such as:

• Steady weight gain
• 6–8 wet nappies per day
• Appearing satisfied after feeds

Adjusting for Growth Spurts

Babies often experience growth spurts, during which they suddenly become more hungry and want to feed more frequently or drink more milk. Common growth spurts occur around:

• 7–10 days
• 3 weeks
• 6 weeks
• 3 months
• 6 months of age

During these phases, offer extra feeds as needed. Your baby’s appetite will typically settle within a few days.

Breast Milk and Formula Combination Feeding

If you’re combining breast milk and formula, you may find that feeding patterns differ. Breast milk is digested more quickly than formula, so that mixed-fed babies might feed more often. Monitor your baby’s overall intake and weight to ensure they’re getting enough.

Recognising Baby’s Feeding Cues

Sometimes babies don’t finish their bottles—and that’s okay. Watch for cues that your baby is full:

• Turning away from the bottle
• Slowing down sucking
• Falling asleep mid-feed

Avoid forcing your baby to finish every bottle. Let them lead the way.

Common Concerns – Formula-Fed Babies

• “My baby is gaining too much/too little weight.” Regular check-ups with your GP or MCH nurse help you track healthy growth.
• “Every baby eats differently.” That’s true. Some babies require 100ml per feed, while others need 180ml. Trust your baby’s signs.
• “How do I keep track?” That’s where Parenting Genie comes in.

🌟 Try the Genie Formula Calculator

Take the guesswork out of feeding. Use our Genie Formula Calculator to get personalised guidance based on your baby’s weight and age.

• Developed by Australian parenting experts
• Updated for local guidelines and measurements (ml)
• Fast and straightforward to use

Join the Parenting Genie Community

Do you need support from other parents and experts? Our Parenting Genie Community gives you:

• Access to exclusive parenting tools
• Weekly baby care tips
• A place to ask questions and feel supported

Book a Telehealth Session Today

If you’re feeling unsure, you don’t have to figure it out alone. Our Maternal Child Health Nurses (MCH) and Lactation Consultants (LC) offer one-on-one Telehealth sessions to:

• Review feeding schedules
• Answer your concerns about the formula
• Support your parenting journey

Final Thoughts – How Much Formula Should I Feed My Baby

Feeding your baby is a journey filled with learning and love. With a bit of guidance, the right tools, and support from Parenting Genie, you’ll feel more prepared and less overwhelmed.

Remember: every baby is different, and you’re doing a great job.

The Raising Children website has some resources on newborns and infants.