Baby Feeding Amount Calculator (Formula + Breastmilk)
Estimate daily formula or breastmilk volume by infant age and weight, per AAP / WIC standard feeding guidelines for healthy term infants.
Volumes per AAP Pediatric Nutrition Handbook (8th ed., 2024) + WIC Infant Feeding Guide. Weight rule of 2.5 fl oz / lb / day capped at 32 oz/day. Applies to healthy term infants on standard 20-kcal/oz formula or breastmilk. Premature, NICU, or special-formula infants follow individualized protocols. After 6 months, introduce iron-rich solids while continuing milk per AAP.
General calculation reads
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About this tool
Standard infant feeding volumes for healthy term babies are derived from two convergent guidelines. By body weight, the AAP Pediatric Nutrition Handbook (8th ed., 2024) and the WIC Infant Feeding Guide recommend 2.5 fl oz of formula per pound of body weight per day, up to about 32 fl oz per day, as a target for the first 6 months. By calorie content, term infants need approximately 100–110 kcal/kg/day in the first 3 months, dropping to 80–90 kcal/kg/day by 6 months — at 20 kcal/oz standard formula, that translates to 5.0–5.5 oz/kg/day initially. By age-band feeding pattern, breastfed and formula-fed infants follow similar daily totals after the first 2 weeks: 0–1 month 16–24 oz/day in 8–12 feeds; 1–2 months 20–28 oz in 7–10 feeds; 2–4 months 24–32 oz in 6–8 feeds; 4–6 months 28–32 oz in 5–7 feeds; 6–12 months 24–28 oz in 4–6 feeds as solids displace milk per AAP starting at 6 months. These are population guidelines — every baby varies, and pediatricians track weight gain (regaining birth weight by 2 weeks; doubling by 5 months; tripling by 12 months) as the real measure.
How to use it
- Enter baby age in months and weight in pounds or kilograms.
- Read recommended total daily volume, per-feed estimate, and feeds-per-day band.
- Compare against your pediatrician's individual recommendation — they have full growth history.
Frequently asked questions
- Does this apply to breastmilk too?
- Yes — total daily milk intake (breastmilk or formula) follows the same volume guidance. Breastfed babies regulate intake more naturally, so the daily total may vary day-to-day more than formula.
- What if my baby is premature?
- Preterm infants follow specialized feeding protocols based on corrected gestational age and caloric density of fortified milk. This calculator is for term infants only — work with your NICU dietitian or pediatrician.
- When do I start solids?
- Per AAP, around 6 months when developmental signs appear (head control, interest in food, doubled birth weight). Continue breastmilk or formula as the primary nutrition source through 12 months.
- Is the 2.5 oz/lb rule a hard cap?
- It is a planning target. The actual maximum varies; consult your pediatrician if your baby consistently wants more than 32 oz/day after 4 weeks, or much less than the guideline.
- Is data sent anywhere?
- No. All math runs in your browser.