How Much Formula Does My Baby Need?

One of the most common questions new formula feeding parents ask is deceptively simple: how much should I actually be giving my baby? Between the numbers on the tin, advice from family, and what feels like an ever-changing appetite, it's easy to feel unsure. Here's a straightforward breakdown based on guidelines, plus how to calculate it yourself.

Formula Serving Guide by Age

Every tin of formula includes its own serving suggestions, and these should always be treated as a starting guide rather than a strict rule — every baby is different. As a general reference, based on National Health and Medical Research Council guidance:

Days 1–4

30–60ml per kg of body weight, per day, increasing gradually over the first few days as your baby's stomach capacity grows.

Days 5 to 3 Months

Around 150ml per kg per day. Some babies, particularly those born preterm, may need up to 180–200ml per kg per day.

3–6 Months

Around 120ml per kg per day.

6–12 Months

Around 100ml per kg per day, sometimes reducing to 90ml per kg per day once solid foods are introduced alongside formula.

How to Calculate Volume Per Feed

Once you know the daily guideline for your baby's age, the maths is straightforward:

Current weight (kg) × recommended ml per kg per day = total volume over 24 hours

Then divide that total by the number of feeds your baby has in a day.

For example, a 6.4kg baby on the 3–6 month guideline: 6.4 × 120ml = 768ml total per day. If that baby has 6 feeds a day, that's 128ml per feed.

Keep in mind this is a guide, not a strict prescription — appetite naturally varies day to day, especially around growth spurts. If you have concerns about how much your baby is eating, your maternal child health nurse or GP is the best person to check in with.

Getting the Scoop Right, Every Time

A huge part of formula accuracy comes down to the scoop, not just the total volume. A "level scoop" means the powder sits exactly level with the top of the scoop — not overflowing, not under-filled. Too much powder makes the formula more concentrated than intended; too little dilutes it. Neither is what your baby's tummy is expecting.

It's also worth using the scoop that comes with your specific tin, since scoop sizes vary between brands. Switching tins without checking the new scoop size is one of the most common (and easiest to fix) formula prep mistakes.

Why Manual Scooping Gets Harder at 2am

In daylight, with a clear head, getting an accurate scoop count right is simple enough. At 2am, with a crying baby and a half-asleep brain, it's a different story and it's exactly the kind of moment where small errors creep in.

This is one of the main reasons Beaba developed the Milkeo Plus, an automatic bottle maker that measures, mixes, heats, and dispenses formula directly into the bottle in under 20 seconds. Rather than counting scoops by torchlight, you set your baby's usual volume once, and the machine takes care of consistent dosing every time — with a lump-free, evenly heated result, whether you want it at room temperature (22°C), body temperature (37°C), or hot enough for a cup of tea.

Because the Milkeo Plus doses formula automatically to your saved setting, it removes one of the biggest variables in accurate formula preparation: human error at the worst possible hour.

A Note on Compatibility

The Milkeo Plus works with most standard powdered formulas, but it isn't recommended for thickened milks, goat's milk formulas, rice protein formulas, or formulas containing high levels of vegetable oil or maltodextrin as a primary ingredient. If you're using a specialty formula, it's worth checking compatibility before setting up your machine.

FAQ

How much formula should a newborn have? 
In the first four days, babies typically need 30–60ml per kg of body weight per day, increasing gradually. From day five to three months, this rises to around 150ml per kg per day for most babies.

How do I calculate how much formula per feed? 
Multiply your baby's current weight in kilograms by the recommended ml per kg per day for their age, then divide that total by the number of feeds in 24 hours.

What does "level scoop" mean? 
It means the formula powder sits exactly flush with the top of the scoop — not heaped, not under-filled to keep the water-to-powder ratio accurate.

Can I use a different brand's scoop with my formula?
No. Always use the scoop provided with your specific tin, as scoop sizes differ between brands and using the wrong one will throw off the concentration.

Does the Milkeo Plus work with all formula brands?
It's compatible with most standard powdered formulas, but isn't recommended for thickened milks, goat's milk, rice protein formulas, or those high in vegetable oil or maltodextrin. Check the compatibility list for your specific brand before use.