Baby Feeding Amount Calculator
Enter your baby's age (and optionally weight) — the calculator shows typical formula per feed, number of feeds per day, and total daily ml based on pediatric guidelines.
verified Last updated: May 2026 · AAP / WHO guidelines
How the ranges work
The calculator uses consensus ranges from AAP (American Academy of Pediatrics) and WHO guidelines for formula feeding in the first year. The table applies to a healthy baby born at term; premature babies and those with special needs follow their pediatrician's specific schedule.
Two main estimation methods:
- By age — typical per-feed amount and feed count grow with age through ~4 months, then plateau. From 6+ months total formula gradually decreases as solids are introduced.
- By weight — clinical rule: about 150 ml per kilogram of body weight per day in the first 6 months, with a cap of ~950 ml/day. That's why most calculators top out near 950 ml even for larger babies.
Numbers are a guide. Individual feeds can be 50% above or below the range — watch the trend across a day and a week, not one data point.
groupsWhat parents most often notice
Tables are one thing — here's how parents actually describe feeding in real life:
- Eats less in the morning, more in the afternoon — appetite varies through the day
- Growth spurt — suddenly empties the bottle and wants more
- Refuses the bottle for a couple of days, then back to normal
- Eats slowly or pauses constantly
- Empties the bottle fast and wants more (maybe a fast-flow nipple)
- Spit-up after feeds — usually normal under 6 months
- Eats easier in arms than in the bouncer
- More night feeds during growth spurts
If the change in appetite overlaps with teething or worse sleep, those usually shift feeding for 2–3 days. Check wake windows too — an overtired baby has a harder time eating.
Hunger and fullness cues
Your baby tells you when they're hungry and when they're full — reading those signals matters more than any calculator.
Hunger cues (early → late)
- Mouthing, rooting
- Sucking on a hand or finger
- Fussing, turning head
- Crying (late cue — better to offer a feed before this)
Fullness cues
- Releases the nipple or breast
- Turns head away from the bottle
- Relaxed body, open hands
- Calms or falls asleep
- Doesn't engage with the offered bottle again
Don't push to "finish the bottle." Babies know how much they need — teaching them to ignore their own fullness signals is linked to worse food relationships later.
How it differs for breastfed babies
Breastfed babies aren't measured in ml — you can't see how much they took. Instead, you track:
- Feeding frequency: typically 8–12 feeds in 24 h at 0–3 months, 6–8 at 3–6 months, gradually fewer as solids start
- Satisfaction after a feed — relaxed body, releases the breast
- 5–6+ wet diapers a day after the first week
- Weight gain along the growth curve (check via the percentile calculator)
- Bowel movements vary — from several per day to one every few days, depending on age
For individual breastfeeding help, see an IBCLC lactation consultant — pediatricians have limited time for lactation specifics.
When to call the pediatrician
- Baby drinks far below the range for more than 2 days and shows signs of illness (fever, lethargy)
- Not gaining weight between measurements, or losing weight
- Fewer than 5–6 wet diapers a day (dehydration sign)
- Vomiting after every feed (a real stream, not spit-up)
- Diarrhea that persists or blood in stool
- Baby never seems full and cries a lot — could need a larger feed or a different nipple flow
Methodology
Ranges are based on AAP (American Academy of Pediatrics) and WHO guidelines for feeding a healthy term baby. The "150 ml × kg/day" rule is standard clinical pediatric practice for the first 6 months.
Last reviewed: May 2026. Ranges are a stable consensus across recent decades.
About the tool: KidyGrow was built by a parent and software engineer who wanted a simpler way to follow feeding and development. The goal isn't to replace your pediatrician or lactation consultant — just a reference you can cross-check.
help_outlineFAQ
How much formula does a baby need per feed?
30–60 ml in the first days, 90–120 ml at one month, 150–180 ml at three months, 180–210 ml at six months.
A single feed can vary by 50% — watch the trend across a day and a week, not one feeding.
How much formula does a baby need per day?
The clinical rule: about 150 ml per kilogram of body weight per day in the first 6 months, with a cap of ~950 ml/day.
After solids start (6+ months), total formula gradually drops.
What if my baby refuses the bottle or eats less?
Appetite varies day to day. Common reasons: teething, illness, milk temperature, fast nipple flow, the lull after a growth spurt.
If refusal lasts 2+ days or your baby looks unwell, talk to the pediatrician.
How do I know my baby is full?
Releases the nipple, turns head away, relaxes hands, doesn't engage with the offered bottle.
Don't push "finish the bottle" — pushing past fullness teaches your child to ignore their own cues.
How is it different for breastfed babies?
Breastfed babies aren't measured by ml. You track feeding frequency, satisfaction, wet diapers, and weight gain.
Typical range: 8–12 feeds in 24 h at 0–3 months, 6–8 at 3–6 months. For individual help, see an IBCLC.
When should I call the pediatrician?
If your baby drinks far below the range for more than 2 days and looks unwell, isn't gaining weight, has fewer than 5–6 wet diapers a day, vomits after every feed, or has diarrhea.
Calculator numbers don't replace a clinical exam.
Sources
- American Academy of Pediatrics — Amount and Schedule of Baby Formula Feedings.
- World Health Organization — Infant and young child feeding.
- HealthyChildren.org (AAP) — first-year feeding recommendations.
- La Leche League — breastfeeding guidance for new parents.
Informational only — not a substitute for pediatric care or a lactation consultant's advice.