Baby's Milk Intake Calculator by Weight
Estimate how much milk your baby needs per day from body weight, age, and number of daily feeds. Results show a range (not a single target), plus per-feed amounts and mL→oz conversion.
⚠️ Educational guide only — not medical advice.
These are widely cited general guidelines. Always follow your pediatrician's advice. Practical signs of adequate intake — steady weight gain, enough wet diapers, alertness — matter more than any number on this page.
Valid range: 1–15 kg (2.2–33 lb).
Guideline bands: 0–6 months (weight-based), 6–12 months (fixed daily guide), 12–24 months (toddler guide).
Typical: 8–12 for newborns, 4–6 milk feeds once solids are established.
Scope boundary: this tool estimates total daily milk intake by weight and age band (metric, pediatric-guideline ranges).
For formula-specific planning in US ounces — including cost per day, can counts, and combo feeding — see our
baby formula feeding calculator.
Daily intake chart by age
| Age | Daily milk (mL) | Total fluids (mL/day) | Notes |
|---|---|---|---|
| 0–6 months | 120–180 per kg (≈150 avg) | = milk intake | Weight-based; milk is the sole nutrition source |
| 6–12 months | 500–700 | 800–1,000 incl. solids | Fixed guide, not weight-based; milk + complementary foods |
| 12–24 months | 200–400 | 800–1,300 | Cow's milk as part of a varied diet |
Worked examples
Signs your baby is getting enough milk
- Steady weight gain at checkups — the single most reliable sign.
- 6+ wet diapers per day after the first week.
- Regular bowel movements and alert, active periods between feeds.
- Baby seems content and settles after feeding.
If weight gain stalls or diaper counts drop, contact your pediatrician — numbers from a calculator never override clinical signs.
Frequently asked questions
How much milk should a baby drink per day?
For babies 0–6 months, the commonly cited guideline is about 150 mL per kg of body weight per 24 hours, with a typical range of 120–180 mL/kg/day. For 6–12 months, milk intake is usually around 500–700 mL per day as part of roughly 800–1,000 mL of total daily fluids including complementary foods. These are educational averages; always follow your pediatrician's advice.
How much milk should a baby drink per feed?
Divide the total daily amount by the number of feeds per day. For example, a 4 kg baby needing about 600 mL/day across 8 feeds gets roughly 75 mL per feed (about 2.5 oz). The calculator above does this division for the low, midpoint, and high ends of the daily range.
How many mL of milk per kg of baby weight?
For 0–6 months, guidance commonly references around 150 mL/kg/day, within a 120–180 mL/kg/day range. A 4 kg baby therefore needs roughly 480–720 mL per day, centered on 600 mL. After 6 months, intake shifts to fixed daily guidance rather than strict weight-based amounts.
How much milk does a 4 kg baby need per day?
At 150 mL/kg/day, a 4 kg baby needs about 600 mL per day, within a typical range of 480–720 mL (120–180 mL/kg). Across 8 feeds that is about 75 mL per feed (60–90 mL range), or roughly 2.5 oz per feed.
How do I convert mL to oz for a baby bottle?
Divide milliliters by 29.57 to get US fluid ounces. For example, 75 mL is about 2.5 oz and 600 mL is about 20.3 oz. The calculator shows both units automatically.
How much milk does a 6 to 12 month old need with solid foods?
Guidance typically suggests about 500–700 mL of milk per day for 6–12 month olds, within roughly 800–1,000 mL of total daily fluids including complementary foods and water. Milk is still an important nutrient source but no longer the only one.
How much milk should a 1 year old drink?
Around 12 months, guidance commonly suggests about 200–400 mL (roughly 1–2 cups) of cow's milk per day as part of a varied diet, not a weight-based calculation. Check with your pediatrician for your child's needs.
What are the signs my baby is getting enough milk?
Practical signs matter more than any number: steady weight gain, at least 6 wet diapers a day after the first week, regular bowel movements, alertness between feeds, and contentment after feeding. If you are worried, contact your pediatrician or lactation consultant rather than relying on a calculator.
Is the amount the same for breast milk and formula?
The volume guidelines are similar, but breastfed babies usually feed on demand and intake varies through the day, while formula amounts are easier to measure per bottle. This calculator estimates total daily intake regardless of milk type; for formula planning (costs, ounces, combo feeding) see our baby formula feeding calculator.
Do babies drink more during growth spurts?
Yes. Temporary increases in feeding frequency during growth spurts are normal and usually settle within a few days. A calculator range is a snapshot; following your baby's hunger cues is the standard advice.
Can I enter my baby's weight in pounds?
Yes. Switch the unit toggle to lb and the calculator converts to kilograms automatically (1 kg = 2.20462 lb) before applying the mL/kg guideline.
What is the upper limit of milk intake for a baby?
The high end of the 0–6 month range is about 180 mL/kg/day. Consistently exceeding the range, poor weight gain, or very few wet diapers are reasons to consult a pediatrician. Ranges are guides, not prescriptions.
Does this calculator work for premature babies?
Preterm babies have different nutritional needs and feeding is usually guided by corrected (adjusted) age and a neonatologist's plan. Use this tool only as background information and rely on your medical team's targets for a premature infant.
Is this calculator medical advice?
No. It is an educational tool based on widely cited general guidelines. It does not replace professional medical advice, diagnosis, or treatment. Always follow your pediatrician's recommendations for your baby.
Free tool by NRTechStudio