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How much should my baby eat?
A free baby feeding calculator. Enter weight and age to see how much formula or breast milk per feed and per day, in ounces and milliliters.
Typical at this age: 6 to 8 feeds. Fewer feeds means bigger feeds.
Per feed
3.6oz
≈ 105 ml · range 3.1–4.2 oz
Per day (24 hours)
25oz
≈ 740 ml
About 2.5 oz per lb of body weight a day (AAP), shared across 7 feeds. Follow your baby's cues: it's fine to stop early or offer a little more.
How much formula does a newborn need?
After the first week, most babies take about 2.5 oz of formula per pound of body weight per day (about 165 ml per kg), spread over 6 to 12 feeds. That's roughly 2 to 4 oz (60 to 120 ml) per feed in the first months, and usually no more than 32 oz (960 ml) a day.
Formula per day by weight
After the first week, using the AAP average of 2.5 oz per pound per day, capped at 32 oz.
| Weight | Per day (oz) | Per day (ml) | Per feed at 8 feeds | Per feed at 6 feeds |
|---|---|---|---|---|
| 6 lb (2.7 kg) | 15 oz | 445 ml | 1.9 oz (55 ml) | 2.5 oz (75 ml) |
| 7 lb (3.2 kg) | 17.5 oz | 520 ml | 2.2 oz (65 ml) | 2.9 oz (85 ml) |
| 8 lb (3.6 kg) | 20 oz | 590 ml | 2.5 oz (75 ml) | 3.3 oz (100 ml) |
| 9 lb (4.1 kg) | 22.5 oz | 665 ml | 2.8 oz (85 ml) | 3.8 oz (110 ml) |
| 10 lb (4.5 kg) | 25 oz | 740 ml | 3.1 oz (90 ml) | 4.2 oz (125 ml) |
| 11 lb (5.0 kg) | 27.5 oz | 815 ml | 3.4 oz (100 ml) | 4.6 oz (135 ml) |
| 12 lb (5.4 kg) | 30 oz | 885 ml | 3.8 oz (110 ml) | 5 oz (150 ml) |
| 13 lb (5.9 kg) | 32 oz | 945 ml | 4 oz (120 ml) | 5.3 oz (160 ml) |
| 14 lb (6.4 kg) | 32 oz | 945 ml | 4 oz (120 ml) | 5.3 oz (160 ml) |
| 15 lb (6.8 kg) | 32 oz | 945 ml | 4 oz (120 ml) | 5.3 oz (160 ml) |
1 oz = 29.57 ml. Values rounded to 0.1 oz and 5 ml.
How we calculate this
Formula, after the first week: daily oz = 2.5 × weight in lb, capped at 32 oz. Per feed = daily oz ÷ feeds in 24 hours. Milliliters = oz × 29.57. This follows the AAP guidance on HealthyChildren.org.
First week (0 to 6 days): about 1 to 2 oz (30 to 60 ml) per feed, 8 to 12 feeds a day, from AAP and CDC. We show the middle of that range.
Expressed breast milk: about 750 ml (25 oz) a day from 1 to 6 months and about 600 ml (20 oz) a day from 6 to 12 months (Australian Breastfeeding Association averages). In the first month we use the smaller of the weight estimate and 750 ml.
The per-feed range divides the daily amount by the typical number of feeds for your baby's age (for example, 8 to 12 for newborns). These numbers are for healthy, full-term babies. Preemies and babies with medical needs often have their own plan from the care team.
When to call your pediatrician
- Your baby often seems hungry after full feeds, or regularly takes much less than usual.
- Spitting up large amounts after most feeds, or seeming in pain while feeding.
- Not back to birth weight by about 2 weeks, or your pediatrician has concerns about weight gain.
- Fewer wet diapers than expected for your baby's age (after day 5, fewer than 6 in 24 hours), or dark yellow urine.
- A temperature of 100.4°F (38°C) or higher in a baby under 3 months. Call right away, day or night.
- Very sleepy, floppy or hard to wake for feeds, or less alert than usual.
- Refusing feeds, or several feeds in a row that are much smaller than usual.
- Signs of dehydration: dry mouth, no tears, a sunken soft spot on the head, or no poop along with very few wet diapers.
- Yellow skin or eyes that's spreading or getting deeper, especially in the first week.
- Forceful or green vomiting, or blood in the poop.
Call 911 (or your local emergency number) if your baby has trouble breathing, turns blue or gray around the lips, or won't wake up.
If something feels off, trust your gut and call. That's what they're there for.
Frequently asked questions
How much formula does a newborn need in the first week?
In the first week, most newborns take about 1 to 2 oz (30 to 60 ml) per feed, 8 to 12 times in 24 hours. On day one many take much less, because their stomach is tiny. Amounts climb through the week as they wake up and get the hang of feeding.
What is the 2.5 oz per pound rule?
The American Academy of Pediatrics says babies take, on average, about 2.5 oz (75 ml) of formula per pound of body weight per day. A 10 lb baby averages about 25 oz a day. It's an average, not a target, and AAP says babies usually need no more than about 32 oz in 24 hours.
Does a breastfed baby need more milk as they grow?
Not much. Exclusively breastfed babies take about the same amount, around 750 ml (25 oz) a day on average, from 1 to 6 months, according to the Australian Breastfeeding Association. Breast milk changes to match your baby, so bottles of expressed milk usually stay around 3 to 4 oz.
My baby wants more than the calculator says. Is that OK?
Usually, yes. Growth spurts, hot days and cluster feeding all bump up intake for a while. Watch your baby's cues: rooting, sucking on hands and lip smacking mean hungry, and turning away or relaxed hands mean full. If your baby often takes far more or far less than this range, ask your pediatrician.
How do I know my baby is getting enough?
Steady weight gain, 6 or more wet diapers a day after day 5, regular poops, and a baby who seems content after most feeds are the usual signs. Your pediatrician tracks weight at checkups. If you're unsure, use our wet diaper checker and bring your notes to the next visit.
Sources
- American Academy of Pediatrics (HealthyChildren.org): Amount and Schedule of Formula Feedings(opens in a new tab)
- Centers for Disease Control and Prevention (CDC): How Much and How Often to Feed Infant Formula(opens in a new tab)
- Centers for Disease Control and Prevention (CDC): How Much and How Often to Breastfeed(opens in a new tab)
- Australian Breastfeeding Association: Expressing: the basics (how much expressed milk babies take)(opens in a new tab)
- NHS: Formula milk: common questions(opens in a new tab)
Last reviewed: November 2026
Feedoo Baby shares general information, not medical advice. Every baby is different. If you're worried about feeding, weight gain, diapers or your baby's health, call your pediatrician, midwife or health visitor.
Let the app keep the running total
Feedoo Baby compares every logged feed with an age-based daily intake band, so at 3am you can see how today is going without doing the math.
- Log a bottle or breastfeed in two taps, in ml
- A home target bar and a Metrics tab with intake bands by age
- Next-feed banner and reminders before a feed is due
- Share the same log with your partner, grandparents or nanny
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