How Much Formula to Feed Your Baby by Age
One of the most common questions in the early weeks is simply: how much is enough? The honest answer is that every baby is a little different, and the numbers below are averages, not targets. Most babies do a very good job of regulating their own intake when they are fed responsively.
Use this guide as a frame of reference — and let your baby's cues, nappies, and weight tell you how the rhythm is actually going.
The General Pattern
Babies eat roughly 150–200 ml of formula per kilogram of body weight per day in the first few months, split across several feeds. As they grow, the volume per feed goes up and the number of feeds per day comes down.
| Age | Typical amount per feed | Feeds per day |
|-----|-------------------------|---------------|
| 0–1 week | 30–60 ml (1–2 oz) | 8–12 |
| 1–4 weeks | 60–90 ml (2–3 oz) | 7–9 |
| 1–2 months | 90–150 ml (3–5 oz) | 6–7 |
| 2–4 months | 120–180 ml (4–6 oz) | 5–6 |
| 4–6 months | 150–210 ml (5–7 oz) | 5 |
| 6–12 months | 180–240 ml (6–8 oz) | 4–5 (alongside solids) |
These are ranges. A 3-month-old might reliably take 120 ml one feed and 180 ml the next, and that's completely normal.
Signs of a Good Intake
More useful than the number on the bottle:
- Nappies — around 6 or more wet nappies per day from day 5 onward, with regular bowel movements
- Weight — steady gain along the baby's own growth curve (not necessarily a particular percentile)
- Alertness — active, responsive periods between feeds
- Settling — generally calm and satisfied after a feed, not inconsolable
If those markers look healthy, the amounts are probably right for your baby — even if they look a bit different from the averages in the table.
Feeding on Cues, Not on the Clock
Responsive feeding means reading the baby rather than the clock. Offer the bottle when you see early hunger cues:
- Rooting or turning toward the bottle
- Hands going to the mouth
- Smacking lips
- Soft fussing
Stop — or at least pause — when you see fullness cues:
- Turning the head away
- Relaxing the hands
- Slowing the suck
- Falling asleep
- Pushing the bottle away
It's fine for one feed to be larger than the next. It's also fine to leave milk in the bottle. Finishing the bottle is not a goal.
Around 4 Months: A Common Wobble
Many parents notice their baby suddenly wanting more milk, or feeding more often, around 4 months. This is often mistaken for a supply problem or a need to switch formula — but it is usually a developmental leap combined with distraction during feeds.
Offering more frequent, shorter feeds in a calm environment usually rides this out within a week or two. If feeds stay rushed, paced bottle feeding can help.
When Solids Start
Most babies begin exploring solid food around 6 months. From this point:
- Total milk intake plateaus rather than continuing to rise
- Milk remains the primary source of nutrition through 12 months
- Amounts per feed and total daily intake vary more, depending on how much solid food the baby is actually eating
Aim for around 500–720 ml (17–24 oz) of formula across the day between 6 and 12 months, adjusting for the baby's cues and growth.
When to Ask for Guidance
Talk to a health visitor, midwife, or paediatrician if:
- The baby is consistently taking much less than the ranges above and weight gain is slow
- The baby seems hungry again almost immediately after every feed
- Feeds end with distress, vomiting (beyond typical spit-up), or choking
- You are regularly going over 960 ml (32 oz) in 24 hours
- Nappies are unusually dry or the baby seems lethargic
Early support is easier than late support, and health professionals are used to these questions.
Log Every Bottle with Flaske
When you are splitting feeds between caregivers, it is easy to lose track of how much the baby has taken today — especially at night. Flaske keeps a quiet, running tally so you don't have to do the mental arithmetic.
With Flaske, you can:
- Log each bottle with amount and time in seconds
- See the day at a glance, including total intake
- Share a synced view with a partner or caregiver
- Review patterns over the week to spot rhythms
Flaske uses private iCloud sync — your baby's feeding data stays inside your own iCloud account and is visible only to the caregivers you invite.
References and Further Reading
- CDC: How much and how often to feed — US guidance on age-based formula amounts
- NHS: Formula milk — common questions — UK National Health Service
- Ammehjelpen: Flaskemating — Norwegian bottle-feeding guidance
This content is for informational purposes only and does not replace professional medical advice. Consult your healthcare provider for personalised guidance.
Frequently asked questions
How much formula does a newborn need per feed?
In the first few days, most newborns take 30–60 ml (1–2 oz) per feed, every 2–3 hours. This gradually increases to around 60–90 ml (2–3 oz) by the end of the first month. Those are averages — some babies take more, some less, and that's usually fine as long as weight gain and nappies look healthy.
How much should a 2–6 month old take?
A common pattern is 120–180 ml (4–6 oz) per feed, 5–6 times a day, with total daily intake around 120–200 ml per kilogram of body weight until solids start. After about 6 months, total daily milk typically plateaus even as solids increase.
How much is too much?
Most babies do not need more than about 960 ml (32 oz) of formula per 24 hours. If your baby seems constantly hungry on that amount, talk to a health visitor or paediatrician before increasing further — it is often a pacing or comfort issue rather than a hunger issue.
What are early hunger cues?
Rooting, sucking on hands, turning the head toward the breast or bottle, smacking lips, and soft fussing are all early cues. Crying is a late cue — it's easier to feed a calm, early-cue baby than an upset one.
How do I know the baby is full?
Fullness cues include turning the head away, closing the mouth, relaxing the hands, slowing the suck, or falling asleep. A baby who turns away does not need the rest of the bottle.
Should I wake my baby to feed?
In the first two weeks, yes — most guidance recommends waking a newborn who sleeps longer than 3–4 hours during the day to feed. Once the baby is back to birth weight and gaining steadily, it is usually fine to let them sleep longer stretches and feed on demand.